begin rework for js tests and hook examples

2025-12-06 17:27:52 +00:00 · 2022-06-06 14:05:17 +00:00
parent d452f9ca5a
commit 5f74392bcb
68 changed files with 4197 additions and 0 deletions
--- a/hook/examples/accept/accept.c
+++ b/hook/examples/accept/accept.c
@@ -0,0 +1,18 @@
+/**
+ * This hook just accepts any transaction coming through it
+ */
+#include "../hookapi.h"
+
+int64_t cbak(uint32_t reserved) { 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved ) {
+
+    TRACESTR("Accept.c: Called.");
+    accept (0,0,0); 
+
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/examples/accept/accept.js
+++ b/hook/examples/accept/accept.js
@@ -0,0 +1,34 @@
+const wasm = 'accept.wasm'
+if (process.argv.length < 3)
+{
+    console.log("Usage: node accept <account family seed>")
+    process.exit(1);
+}
+
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const secret  = process.argv[2];
+    const account = t.xrpljs.Wallet.fromSeed(secret)
+    t.feeSubmit(process.argv[2],
+    {
+        Account: account.classicAddress,
+        TransactionType: "SetHook",
+        Hooks: [
+            {
+                Hook: {
+                    CreateCode: t.wasm(wasm),
+                    HookApiVersion: 0,
+                    HookNamespace: "CAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFE",
+                    HookOn: "0000000000000000",
+                    Flags: t.hsfOVERRIDE
+                }
+            }
+        ]
+    }).then(x=>
+    {
+        t.assertTxnSuccess(x)
+        console.log(x);
+        process.exit(0);
+
+    }).catch(e=>console.log(e));
+}).catch(e=>console.log(e));
--- a/hook/examples/accept/makefile
+++ b/hook/examples/accept/makefile
@@ -0,0 +1,4 @@
+all:
+	wasmcc accept.c -o accept.wasm -O0 -Wl,--allow-undefined -I../
+	hook-cleaner accept.wasm
+
--- a/hook/examples/accept/pay.js
+++ b/hook/examples/accept/pay.js
@@ -0,0 +1,19 @@
+if (process.argv.length < 5)
+{
+    console.log("Usage: node pay <source family seed> <amount xrp> <destination account>")
+    process.exit(1)
+}
+const secret  = process.argv[2];
+const amount = BigInt(process.argv[3]) * 1000000n
+const dest = process.argv[4];
+const server = 'ws://localhost:6005'
+require('../../utils-tests.js').TestRig(server).then(t=>
+{
+    t.pay(secret, amount, dest).then(x=>
+    {
+        console.log(x);
+        process.exit(0);
+    });
+});
+
+
--- a/hook/examples/carbon/carbon.c
+++ b/hook/examples/carbon/carbon.c
@@ -0,0 +1,95 @@
+#include <stdint.h>
+#include "hookapi.h"
+
+int64_t cbak(uint32_t reserved)
+{
+    TRACESTR("Carbon: callback called.");
+    return 0;
+}
+
+int64_t hook(uint32_t reserved)
+{
+
+    TRACESTR("Carbon: started");
+
+    // before we start calling hook-api functions we should tell the hook how many tx we intend to create
+    etxn_reserve(1); // we are going to emit 1 transaction
+    
+    // hooks communicate accounts via the 20 byte account ID, this can be generated from an raddr like so
+    // a more efficient way to do this is precompute the account-id from the raddr (if the raddr never changes)
+    uint8_t carbon_accid[20];
+    int64_t ret = util_accid(
+            SBUF(carbon_accid),                                   /* <-- generate into this buffer  */
+            SBUF("rfCarbonVNTuXckX6x2qTMFmFSnm6dEWGX") );         /* <-- from this r-addr           */
+    TRACEVAR(ret);
+
+    // this api fetches the AccountID of the account the hook currently executing is installed on
+    // since hooks can be triggered by both incoming and ougoing transactions this is important to know
+    unsigned char hook_accid[20];
+    hook_account((uint32_t)hook_accid, 20);
+
+    // NB:
+    //  almost all of the hook apis require a buffer pointer and buffer length to be supplied ... to make this a
+    //  little easier to code a macro: `SBUF(your_buffer)` expands to `your_buffer, sizeof(your_buffer)`
+
+    // next fetch the sfAccount field from the originating transaction
+    uint8_t account_field[20];
+    int32_t account_field_len = otxn_field(SBUF(account_field), sfAccount);
+    TRACEVAR(account_field_len);
+    if (account_field_len < 20)                                   // negative values indicate errors from every api
+        rollback(SBUF("Carbon: sfAccount field missing!!!"), 1);  // this code could never be hit in prod
+                                                                  // but it's here for completeness
+
+    // compare the "From Account" (sfAccount) on the transaction with the account the hook is running on
+    int equal = 0; BUFFER_EQUAL(equal, hook_accid, account_field, 20);
+    if (!equal)
+    {
+        // if the accounts are not equal (memcmp != 0) the otxn was sent to the hook account by someone else
+        // accept() it and end the hook execution here
+        accept(SBUF("Carbon: Incoming transaction"), 2);
+    }
+
+    // execution to here means the user has sent a valid transaction FROM the account the hook is installed on
+
+    // fetch the sent Amount
+    // Amounts can be 384 bits or 64 bits. If the Amount is an XRP value it will be 64 bits.
+    unsigned char amount_buffer[48];
+    int64_t amount_len = otxn_field(SBUF(amount_buffer), sfAmount);
+    int64_t drops_to_send = 1000; // this will be the default
+
+
+    if (amount_len != 8)
+    {
+        // you can trace the behaviour of your hook using the trace(buf, size, as_hex) api
+        // which will output to xrpld's trace log
+        TRACESTR("Carbon: Non-xrp transaction detected, sending default 1000 drops to rfCarbon");
+    } else
+    {
+        TRACESTR("Carbon: XRP transaction detected, computing 1% to send to rfCarbon");
+        int64_t otxn_drops = AMOUNT_TO_DROPS(amount_buffer);
+        TRACEVAR(otxn_drops);
+        if (otxn_drops > 100000)   // if its less we send the default amount. or if there was an error we send default
+            drops_to_send = (int64_t)((double)otxn_drops * 0.01f); // otherwise we send 1%
+    }
+
+    TRACEVAR(drops_to_send);
+
+
+    // create a buffer to write the emitted transaction into
+    unsigned char tx[PREPARE_PAYMENT_SIMPLE_SIZE];
+
+    // we will use an XRP payment macro, this will populate the buffer with a serialized binary transaction
+    // Parameter list: ( buf_out, drops_amount, to_address, dest_tag, src_tag )
+    PREPARE_PAYMENT_SIMPLE(tx, drops_to_send++, carbon_accid, 0, 0);
+    
+
+    // emit the transaction
+    uint8_t emithash[32];
+    int64_t emit_result = emit(SBUF(emithash), SBUF(tx));
+    TRACEVAR(emit_result);
+
+    // accept and allow the original transaction through
+    accept(SBUF("Carbon: Emitted transaction"), 0);
+    return 0;
+
+}
--- a/hook/examples/carbon/carbon.js
+++ b/hook/examples/carbon/carbon.js
@@ -0,0 +1,38 @@
+const wasm = 'carbon.wasm'
+if (process.argv.length < 3)
+{
+    console.log("Usage: node carbon <account family seed>")
+    process.exit(1);
+}
+
+
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    t.fundFromGenesis(["rfCarbonVNTuXckX6x2qTMFmFSnm6dEWGX"]).then(()=>
+    {
+        const secret  = process.argv[2];
+        const account = t.xrpljs.Wallet.fromSeed(secret)
+        t.feeSubmit(process.argv[2],
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm(wasm),
+                        HookApiVersion: 0,
+                        HookNamespace: "CAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFE",
+                        HookOn: "0000000000000000",
+                        Flags: t.hsfOVERRIDE
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            process.exit(0);
+
+        }).catch(t.err);
+    }).catch(t.err);
+}).catch(e=>console.log(e));
--- a/hook/examples/carbon/makefile
+++ b/hook/examples/carbon/makefile
@@ -0,0 +1,5 @@
+all:
+	wasmcc carbon.c -o carbon.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner carbon.wasm
+
+
--- a/hook/examples/carbon/pay.js
+++ b/hook/examples/carbon/pay.js
@@ -0,0 +1,19 @@
+if (process.argv.length < 5)
+{
+    console.log("Usage: node pay <source family seed> <amount xrp> <destination account>")
+    process.exit(1)
+}
+const secret  = process.argv[2];
+const amount = BigInt(process.argv[3]) * 1000000n
+const dest = process.argv[4];
+
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    t.pay(secret, amount, dest).then(x=>
+    {
+        console.log(x);
+        process.exit(0);
+    });
+});
+
+
--- a/hook/examples/doubler/doubler.c
+++ b/hook/examples/doubler/doubler.c
@@ -0,0 +1,72 @@
+//Authors: NeilH, RichardAH
+// (joke) test hook that doubles incoming XRP payments and sends it back
+// April 1st 2021: Added (unfair) coin flip
+
+#include <stdint.h>
+#include "../hookapi.h"
+
+int64_t hook(uint32_t reserved)
+{
+    
+    uint8_t hook_accid[20];
+    if (hook_account(SBUF(hook_accid)) < 0)
+        rollback(SBUF("Doubler: Could not fetch hook account id."), 1);
+
+    // next fetch the sfAccount field from the originating transaction
+    uint8_t account_field[20];
+    int32_t account_field_len = otxn_field(SBUF(account_field), sfAccount);
+
+    // compare the "From Account" (sfAccount) on the transaction with the account the hook is running on
+    int equal = 0; BUFFER_EQUAL(equal, hook_accid, account_field, 20);
+    if (equal)
+    {
+        accept(SBUF("Doubler: Outgoing transaction. Passing."), 2);
+        return 0;
+    }
+
+    uint8_t digest[96];
+    if (ledger_last_hash(digest, 32) != 32)
+        rollback(SBUF("Doubler: Failed to fetch last closed ledger."), 3);
+
+    uint8_t key[32]; // left as 0...0
+    state(digest + 32, 32, SBUF(key)); // if this load fails then we don't care, the hash is just 0
+    etxn_nonce(digest + 64, 32); // todo: if we enforce sfFirstLedgerSequence = +1 then this will be impossible to cheat
+
+    uint8_t hash[32];
+    if (util_sha512h(SBUF(hash), SBUF(digest)) != 32)
+        rollback(SBUF("Doubler: Could not compute digest for coin flip."), 4);
+
+    if (state_set(SBUF(hash), SBUF(key)) != 32)
+        rollback(SBUF("Doubler: Could not set state."), 5);
+
+    // first digit of lcl hash is our biased coin flip, you lose 60% of the time :P
+    if (hash[0] % 10 < 6)
+        accept(SBUF("Doubler: Tails, you lose. Om nom nom xrp."), 4);
+
+    // before we start calling hook-api functions we should tell the hook how many tx we intend to create
+    etxn_reserve(1); // we are going to emit 1 transaction
+
+    // fetch the sent Amount
+    // Amounts can be 384 bits or 64 bits. If the Amount is an XRP value it will be 64 bits.
+    unsigned char amount_buffer[48];
+    int64_t amount_len = otxn_field(SBUF(amount_buffer), sfAmount);
+    int64_t drops_to_send = AMOUNT_TO_DROPS(amount_buffer) * 2; // doubler pays back 2x received
+
+    if (amount_len != 8)
+        rollback(SBUF("Doubler: Rejecting incoming non-XRP transaction"), 5);
+
+    uint8_t tx[PREPARE_PAYMENT_SIMPLE_SIZE];
+
+    // we will use an XRP payment macro, this will populate the buffer with a serialized binary transaction
+    // Parameter list: ( buf_out, drops_amount, drops_fee, to_address, dest_tag, src_tag )
+    PREPARE_PAYMENT_SIMPLE(tx, drops_to_send, account_field, 0, 0);
+
+    // emit the transaction
+    uint8_t emithash[32];
+    emit(SBUF(emithash), SBUF(tx));
+
+    // accept and allow the original transaction through
+    accept(SBUF("Doubler: Heads, you won! Funds emitted!"), 0);
+    return 0;
+
+}
--- a/hook/examples/doubler/doubler.js
+++ b/hook/examples/doubler/doubler.js
@@ -0,0 +1,35 @@
+const wasm = 'doubler.wasm'
+if (process.argv.length < 3)
+{
+    console.log("Usage: node doubler <account family seed>")
+    process.exit(1);
+}
+
+
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const secret  = process.argv[2];
+    const account = t.xrpljs.Wallet.fromSeed(secret)
+    t.feeSubmit(process.argv[2],
+    {
+        Account: account.classicAddress,
+        TransactionType: "SetHook",
+        Hooks: [
+            {
+                Hook: {
+                    CreateCode: t.wasm(wasm),
+                    HookApiVersion: 0,
+                    HookNamespace: "CAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFECAFE",
+                    HookOn: "0000000000000000",
+                    Flags: t.hsfOVERRIDE
+                }
+            }
+        ]
+    }).then(x=>
+    {
+        t.assertTxnSuccess(x)
+        console.log(x);
+        process.exit(0);
+
+    }).catch(t.err);
+}).catch(e=>console.log(e));
--- a/hook/examples/doubler/makefile
+++ b/hook/examples/doubler/makefile
@@ -0,0 +1,4 @@
+all:
+	wasmcc doubler.c -o doubler.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner doubler.wasm
+
--- a/hook/examples/doubler/pay.js
+++ b/hook/examples/doubler/pay.js
@@ -0,0 +1,19 @@
+if (process.argv.length < 5)
+{
+    console.log("Usage: node pay <source family seed> <amount xrp> <destination account>")
+    process.exit(1)
+}
+const secret  = process.argv[2];
+const amount = BigInt(process.argv[3]) * 1000000n
+const dest = process.argv[4];
+
+require('../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    t.pay(secret, amount, dest).then(x=>
+    {
+        console.log(x);
+        process.exit(0);
+    });
+});
+
+
--- a/hook/examples/error.h
+++ b/hook/examples/error.h
@@ -0,0 +1,46 @@
+// For documentation please see: https://xrpl-hooks.readme.io/reference/
+// Generated using generate_error.sh
+#ifndef HOOK_ERROR_CODES
+#define SUCCESS 0
+#define OUT_OF_BOUNDS -1
+#define INTERNAL_ERROR -2
+#define TOO_BIG -3
+#define TOO_SMALL -4
+#define DOESNT_EXIST -5
+#define NO_FREE_SLOTS -6
+#define INVALID_ARGUMENT -7
+#define ALREADY_SET -8
+#define PREREQUISITE_NOT_MET -9
+#define FEE_TOO_LARGE -10
+#define EMISSION_FAILURE -11
+#define TOO_MANY_NONCES -12
+#define TOO_MANY_EMITTED_TXN -13
+#define NOT_IMPLEMENTED -14
+#define INVALID_ACCOUNT -15
+#define GUARD_VIOLATION -16
+#define INVALID_FIELD -17
+#define PARSE_ERROR -18
+#define RC_ROLLBACK -19
+#define RC_ACCEPT -20
+#define NO_SUCH_KEYLET -21
+#define NOT_AN_ARRAY -22
+#define NOT_AN_OBJECT -23
+#define INVALID_FLOAT -10024
+#define DIVISION_BY_ZERO -25
+#define MANTISSA_OVERSIZED -26
+#define MANTISSA_UNDERSIZED -27
+#define EXPONENT_OVERSIZED -28
+#define EXPONENT_UNDERSIZED -29
+#define OVERFLOW -30
+#define NOT_IOU_AMOUNT -31
+#define NOT_AN_AMOUNT -32
+#define CANT_RETURN_NEGATIVE -33
+#define NOT_AUTHORIZED -34
+#define PREVIOUS_FAILURE_PREVENTS_RETRY -35
+#define TOO_MANY_PARAMS -36
+#define INVALID_TXN -37
+#define RESERVE_INSUFFICIENT -38
+#define COMPLEX_NOT_SUPPORTED -39
+#define DOES_NOT_MATCH -40
+#define HOOK_ERROR_CODES
+#endif //HOOK_ERROR_CODES
--- a/hook/examples/extern.h
+++ b/hook/examples/extern.h
@@ -0,0 +1,539 @@
+// For documentation please see: https://xrpl-hooks.readme.io/reference/
+// Generated using generate_extern.sh
+#include <stdint.h>
+#ifndef HOOK_EXTERN
+
+extern int32_t 
+_g(
+    uint32_t guard_id,
+    uint32_t maxiter
+);
+
+extern int64_t 
+accept(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    int64_t error_code
+);
+
+extern int64_t 
+emit(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+etxn_burden (
+    void
+);
+
+extern int64_t 
+etxn_details(
+    uint32_t write_ptr,
+    uint32_t write_len
+);
+
+extern int64_t 
+etxn_fee_base(
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+etxn_generation (
+    void
+);
+
+extern int64_t 
+etxn_nonce(
+    uint32_t write_ptr,
+    uint32_t write_len
+);
+
+extern int64_t 
+etxn_reserve(
+    uint32_t count
+);
+
+extern int64_t 
+fee_base (
+    void
+);
+
+extern int64_t 
+float_compare(
+    int64_t float1,
+    int64_t float2,
+    uint32_t mode
+);
+
+extern int64_t 
+float_divide(
+    int64_t float1,
+    int64_t float2
+);
+
+extern int64_t 
+float_exponent(
+    int64_t float1
+);
+
+extern int64_t 
+float_exponent_set(
+    int64_t float1,
+    int32_t exponent
+);
+
+extern int64_t 
+float_int(
+    int64_t float1,
+    uint32_t decimal_places,
+    uint32_t abs
+);
+
+extern int64_t 
+float_invert(
+    int64_t float1
+);
+
+extern int64_t 
+float_log(
+    int64_t float1
+);
+
+extern int64_t 
+float_mantissa(
+    int64_t float1
+);
+
+extern int64_t 
+float_mantissa_set(
+    int64_t float1,
+    int64_t mantissa
+);
+
+extern int64_t 
+float_mulratio(
+    int64_t float1,
+    uint32_t round_up,
+    uint32_t numerator,
+    uint32_t denominator
+);
+
+extern int64_t 
+float_multiply(
+    int64_t float1,
+    int64_t float2
+);
+
+extern int64_t 
+float_negate(
+    int64_t float1
+);
+
+extern int64_t 
+float_one (
+    void
+);
+
+extern int64_t 
+float_root(
+    int64_t float1,
+    uint32_t n
+);
+
+extern int64_t 
+float_set(
+    int32_t exponent,
+    int64_t mantissa
+);
+
+extern int64_t 
+float_sign(
+    int64_t float1
+);
+
+extern int64_t 
+float_sign_set(
+    int64_t float1,
+    uint32_t negative
+);
+
+extern int64_t 
+float_sto(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t cread_ptr,
+    uint32_t cread_len,
+    uint32_t iread_ptr,
+    uint32_t iread_len,
+    int64_t float1,
+    uint32_t field_code
+);
+
+extern int64_t 
+float_sto_set(
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+float_sum(
+    int64_t float1,
+    int64_t float2
+);
+
+extern int64_t 
+hook_account(
+    uint32_t write_ptr,
+    uint32_t write_len
+);
+
+extern int64_t 
+hook_again (
+    void
+);
+
+extern int64_t 
+hook_hash(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    int32_t hook_no
+);
+
+extern int64_t 
+hook_param(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+hook_param_set(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t kread_ptr,
+    uint32_t kread_len,
+    uint32_t hread_ptr,
+    uint32_t hread_len
+);
+
+extern int64_t 
+hook_pos (
+    void
+);
+
+extern int64_t 
+hook_skip(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t flags
+);
+
+extern int64_t 
+ledger_keylet(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t lread_ptr,
+    uint32_t lread_len,
+    uint32_t hread_ptr,
+    uint32_t hread_len
+);
+
+extern int64_t 
+ledger_last_hash(
+    uint32_t write_ptr,
+    uint32_t write_len
+);
+
+extern int64_t 
+ledger_last_time (
+    void
+);
+
+extern int64_t 
+ledger_nonce(
+    uint32_t write_ptr,
+    uint32_t write_len
+);
+
+extern int64_t 
+ledger_seq (
+    void
+);
+
+extern int64_t 
+meta_slot(
+    uint32_t slot_no
+);
+
+extern int64_t 
+otxn_burden (
+    void
+);
+
+extern int64_t 
+otxn_field(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t field_id
+);
+
+extern int64_t 
+otxn_field_txt(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t field_id
+);
+
+extern int64_t 
+otxn_generation (
+    void
+);
+
+extern int64_t 
+otxn_id(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t flags
+);
+
+extern int64_t 
+otxn_slot(
+    uint32_t slot_no
+);
+
+extern int64_t 
+otxn_type (
+    void
+);
+
+extern int64_t 
+rollback(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    int64_t error_code
+);
+
+extern int64_t 
+slot(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t slot
+);
+
+extern int64_t 
+slot_clear(
+    uint32_t slot
+);
+
+extern int64_t 
+slot_count(
+    uint32_t slot
+);
+
+extern int64_t 
+slot_float(
+    uint32_t slot_no
+);
+
+extern int64_t 
+slot_id(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t slot
+);
+
+extern int64_t 
+slot_set(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    int32_t slot
+);
+
+extern int64_t 
+slot_size(
+    uint32_t slot
+);
+
+extern int64_t 
+slot_subarray(
+    uint32_t parent_slot,
+    uint32_t array_id,
+    uint32_t new_slot
+);
+
+extern int64_t 
+slot_subfield(
+    uint32_t parent_slot,
+    uint32_t field_id,
+    uint32_t new_slot
+);
+
+extern int64_t 
+slot_type(
+    uint32_t slot_no,
+    uint32_t flags
+);
+
+extern int64_t 
+state(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t kread_ptr,
+    uint32_t kread_len
+);
+
+extern int64_t 
+state_foreign(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t kread_ptr,
+    uint32_t kread_len,
+    uint32_t nread_ptr,
+    uint32_t nread_len,
+    uint32_t aread_ptr,
+    uint32_t aread_len
+);
+
+extern int64_t 
+state_foreign_set(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t kread_ptr,
+    uint32_t kread_len,
+    uint32_t nread_ptr,
+    uint32_t nread_len,
+    uint32_t aread_ptr,
+    uint32_t aread_len
+);
+
+extern int64_t 
+state_set(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t kread_ptr,
+    uint32_t kread_len
+);
+
+extern int64_t 
+sto_emplace(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t sread_ptr,
+    uint32_t sread_len,
+    uint32_t fread_ptr,
+    uint32_t fread_len,
+    uint32_t field_id
+);
+
+extern int64_t 
+sto_erase(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t field_id
+);
+
+extern int64_t 
+sto_subarray(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t array_id
+);
+
+extern int64_t 
+sto_subfield(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t field_id
+);
+
+extern int64_t 
+sto_validate(
+    uint32_t tread_ptr,
+    uint32_t tread_len
+);
+
+extern int64_t 
+trace(
+    uint32_t mread_ptr,
+    uint32_t mread_len,
+    uint32_t dread_ptr,
+    uint32_t dread_len,
+    uint32_t as_hex
+);
+
+extern int64_t 
+trace_float(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    int64_t float1
+);
+
+extern int64_t 
+trace_num(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    int64_t number
+);
+
+extern int64_t 
+trace_slot(
+    uint32_t read_ptr,
+    uint32_t read_len,
+    uint32_t slot
+);
+
+extern int64_t 
+util_accid(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+util_keylet(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t keylet_type,
+    uint32_t a,
+    uint32_t b,
+    uint32_t c,
+    uint32_t d,
+    uint32_t e,
+    uint32_t f
+);
+
+extern int64_t 
+util_raddr(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+util_sha512h(
+    uint32_t write_ptr,
+    uint32_t write_len,
+    uint32_t read_ptr,
+    uint32_t read_len
+);
+
+extern int64_t 
+util_verify(
+    uint32_t dread_ptr,
+    uint32_t dread_len,
+    uint32_t sread_ptr,
+    uint32_t sread_len,
+    uint32_t kread_ptr,
+    uint32_t kread_len
+);
+#define HOOK_EXTERN
+#endif //HOOK_EXTERN
--- a/hook/examples/genheaders.sh
+++ b/hook/examples/genheaders.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+headergen/generate_error.sh > error.h
+headergen/generate_extern.sh > extern.h
+headergen/generate_sfcodes.sh > sfcodes.h
+
--- a/hook/examples/headergen/README.md
+++ b/hook/examples/headergen/README.md
@@ -0,0 +1,2 @@
+Bash scripts herein will generate up to date headers from the Hooks source.
+You must pipe them into the desired output file.
--- a/hook/examples/headergen/generate_error.sh
+++ b/hook/examples/headergen/generate_error.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+RIPPLED_ROOT="`git rev-parse --show-toplevel`/src/ripple"
+echo '// For documentation please see: https://xrpl-hooks.readme.io/reference/'
+echo '// Generated using generate_error.sh'
+echo '#ifndef HOOK_ERROR_CODES'
+cat $RIPPLED_ROOT/app/hook/Enum.h | tr -d '\n' | grep -Eo 'hook_return_code : int64_t *{[^}]+}' | grep -Eo '[A-Z_]+ *= *[0-9-]+' | sed -E 's/ *= */ /g' | sed -E 's/^/#define /g'
+echo '#define HOOK_ERROR_CODES'
+echo '#endif //HOOK_ERROR_CODES'
--- a/hook/examples/headergen/generate_extern.sh
+++ b/hook/examples/headergen/generate_extern.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+RIPPLED_ROOT="`git rev-parse --show-toplevel`/src/ripple"
+echo '// For documentation please see: https://xrpl-hooks.readme.io/reference/'
+echo '// Generated using generate_extern.sh'
+echo '#include <stdint.h>'
+echo '#ifndef HOOK_EXTERN'
+cat $RIPPLED_ROOT/app/hook/applyHook.h  |  tr -d '\n' |  grep -Eo 'DECLARE_HOOK[^\(]+\([^\)]+\)'  |  grep DECLARE_HOOK |  cut -d'(' -f2 |  sed -E 's/_t,/_t/g' |  sed -E 's/  */ /g' | sort | grep -Ev '^$' | sed -E s'/\)/ \)/g' | tr '\t' ' '  | sed -E 's/^([^ ]+ [^ ]+)/\1,/g' | sed -E 's/,,*/,/g' | sed -E 's/\)/\)\n/g' | sort | grep -vE '^$' | sed -E 's/^([^,]+),/\1 (/g' | sed -E 's/\( *\)/(void)/g' | sed -E 's/, *\(/(/g' | sed -E 's/  */ /g' | sed -E 's/ *\( /(/g' | sed -E 's/ \)/)/g' | sed -E 's/\)([^;]?)/);\1/g' | sed -E 's/^int/extern int/g' | sed -E 's/^(extern [^ ]+ )/\1\n/g' | grep -Ev '^,+$' | sed -E 's/\(/\(\n    /g' | sed -E 's/, */,\n    /g' | sed -E 's/^extern/\nextern/g' | sed -E 's/\);/\n);/g'
+echo '#define HOOK_EXTERN'
+echo '#endif //HOOK_EXTERN'
--- a/hook/examples/headergen/generate_sfcodes.sh
+++ b/hook/examples/headergen/generate_sfcodes.sh
@@ -0,0 +1,30 @@
+#/bin/bash
+RIPPLED_ROOT="`git rev-parse --show-toplevel`/src/ripple"
+echo '// For documentation please see: https://xrpl-hooks.readme.io/reference/'
+echo '// Generated using generate_sfcodes.sh'
+cat $RIPPLED_ROOT/protocol/impl/SField.cpp | grep -E '^CONSTRUCT_' |
+    sed 's/UINT16/1/g' |
+    sed 's/UINT32/2/g' |
+    sed 's/UINT64/3/g' |
+    sed 's/HASH128/4/g' |
+    sed 's/HASH256/5/g' |
+    sed 's/UINT128/4/g' |
+    sed 's/UINT256/5/g' |
+    sed 's/AMOUNT/6/g' |
+    sed 's/VL/7/g' |
+    sed 's/ACCOUNT/8/g' |
+    sed 's/OBJECT/14/g' |
+    sed 's/ARRAY/15/g' |
+    sed 's/UINT8/16/g' |
+    sed 's/HASH160/17/g' |
+    sed 's/UINT160/17/g' |
+    sed 's/PATHSET/18/g' |
+    sed 's/VECTOR256/19/g' |
+    sed 's/UINT96/20/g' |
+    sed 's/UINT192/21/g' |
+    sed 's/UINT384/22/g' |
+    sed 's/UINT512/23/g' |
+    grep -Eo '"([^"]+)", *([0-9]+), *([0-9]+)' |
+    sed 's/"//g' | sed 's/ *//g' | sed 's/,/ /g' |
+    awk '{print ("#define sf"$1" (("$2"U << 16U) + "$3"U)")}'
+
--- a/hook/examples/hookapi.h
+++ b/hook/examples/hookapi.h
@@ -0,0 +1,48 @@
+/**
+ * Hook API include file
+ *
+ * Note to the reader:
+ * This include defines two types of things: external functions and macros
+ * Functions are used sparingly because a non-inlining compiler may produce
+ * undesirable output.
+ *
+ * Find documentation here: https://xrpl-hooks.readme.io/reference/
+ */
+
+#ifndef HOOKAPI_INCLUDED
+#define HOOKAPI_INCLUDED 1
+
+
+#define KEYLET_HOOK 1
+#define KEYLET_HOOK_STATE 2
+#define KEYLET_ACCOUNT 3
+#define KEYLET_AMENDMENTS 4
+#define KEYLET_CHILD 5
+#define KEYLET_SKIP 6
+#define KEYLET_FEES 7
+#define KEYLET_NEGATIVE_UNL 8
+#define KEYLET_LINE 9
+#define KEYLET_OFFER 10
+#define KEYLET_QUALITY 11
+#define KEYLET_EMITTED_DIR 12
+#define KEYLET_TICKET 13
+#define KEYLET_SIGNERS 14
+#define KEYLET_CHECK 15
+#define KEYLET_DEPOSIT_PREAUTH 16
+#define KEYLET_UNCHECKED 17
+#define KEYLET_OWNER_DIR 18
+#define KEYLET_PAGE 19
+#define KEYLET_ESCROW 20
+#define KEYLET_PAYCHAN 21
+#define KEYLET_EMITTED 22
+
+#define COMPARE_EQUAL 1U
+#define COMPARE_LESS 2U
+#define COMPARE_GREATER 4U
+
+#include "error.h"
+#include "extern.h"
+#include "sfcodes.h"
+#include "macro.h"
+
+#endif
--- a/hook/examples/macro.h
+++ b/hook/examples/macro.h
@@ -0,0 +1,544 @@
+/**
+ * These are helper macros for writing hooks, all of them are optional as is including hookmacro.h at all
+ */
+
+#include <stdint.h>
+#include "hookapi.h"
+#include "sfcodes.h"
+
+#ifndef HOOKMACROS_INCLUDED
+#define HOOKMACROS_INCLUDED 1
+
+// hook developers should use this guard macro, simply GUARD(<maximum iterations>)
+#define GUARD(maxiter) _g(__LINE__, (maxiter)+1)
+#define GUARDM(maxiter, n) _g(((__LINE__ << 16) + n), (maxiter)+1)
+
+#define SBUF(str) (uint32_t)(str), sizeof(str)
+
+#define REQUIRE(cond, str)\
+{\
+    if (!(cond))\
+        rollback(SBUF(str), __LINE__);\
+}
+
+// make a report buffer as a c-string
+// provide a name for a buffer to declare (buf)
+// provide a static string
+// provide an integer to print after the string
+#define RBUF(buf, out_len, str, num)\
+unsigned char buf[sizeof(str) + 21];\
+int out_len = 0;\
+{\
+    int i = 0;\
+    for (; GUARDM(sizeof(str),1),i < sizeof(str); ++i)\
+        (buf)[i] = str[i];\
+    if ((buf)[sizeof(str)-1] == 0) i--;\
+    if ((num) < 0) (buf)[i++] = '-';\
+    uint64_t unsigned_num = (uint64_t)( (num) < 0 ? (num) * -1 : (num) );\
+    uint64_t j = 10000000000000000000ULL;\
+    int start = 1;\
+    for (; GUARDM(20,2), unsigned_num > 0 && j > 0; j /= 10)\
+    {\
+        unsigned char digit = ( unsigned_num / j ) % 10;\
+        if (digit == 0 && start)\
+            continue;\
+        start = 0;\
+        (buf)[i++] = '0' + digit;\
+    }\
+    (buf)[i] = '\0';\
+    out_len = i;\
+}
+
+#define RBUF2(buff, out_len, str, num, str2, num2)\
+unsigned char buff[sizeof(str) + sizeof(str2) + 42];\
+int out_len = 0;\
+{\
+    unsigned char* buf = buff;\
+    int i = 0;\
+    for (; GUARDM(sizeof(str),1),i < sizeof(str); ++i)\
+        (buf)[i] = str[i];\
+    if ((buf)[sizeof(str)-1] == 0) i--;\
+    if ((num) < 0) (buf)[i++] = '-';\
+    uint64_t unsigned_num = (uint64_t)( (num) < 0 ? (num) * -1 : (num) );\
+    uint64_t j = 10000000000000000000ULL;\
+    int start = 1;\
+    for (; GUARDM(20,2), unsigned_num > 0 && j > 0; j /= 10)\
+    {\
+        unsigned char digit = ( unsigned_num / j ) % 10;\
+        if (digit == 0 && start)\
+            continue;\
+        start = 0;\
+        (buf)[i++] = '0' + digit;\
+    }\
+    buf += i;\
+    out_len += i;\
+    i = 0;\
+    for (; GUARDM(sizeof(str2),3),i < sizeof(str2); ++i)\
+        (buf)[i] = str2[i];\
+    if ((buf)[sizeof(str2)-1] == 0) i--;\
+    if ((num2) < 0) (buf)[i++] = '-';\
+    unsigned_num = (uint64_t)( (num2) < 0 ? (num2) * -1 : (num2) );\
+    j = 10000000000000000000ULL;\
+    start = 1;\
+    for (; GUARDM(20,4), unsigned_num > 0 && j > 0; j /= 10)\
+    {\
+        unsigned char digit = ( unsigned_num / j ) % 10;\
+        if (digit == 0 && start)\
+            continue;\
+        start = 0;\
+        (buf)[i++] = '0' + digit;\
+    }\
+    (buf)[i] = '\0';\
+    out_len += i;\
+}
+
+#define TRACEVAR(v) trace_num((uint32_t)(#v), (uint32_t)(sizeof(#v) - 1), (int64_t)v);
+#define TRACEHEX(v) trace((uint32_t)(#v), (uint32_t)(sizeof(#v)), (uint32_t)(v), (uint32_t)(sizeof(v)), 1);
+#define TRACEXFL(v) trace_float((uint32_t)(#v), (uint32_t)(sizeof(#v)), (int64_t)v);
+#define TRACESTR(v) trace((uint32_t)(#v), (uint32_t)(sizeof(#v)), (uint32_t)(v), sizeof(v), 0);
+
+#define CLEARBUF(b)\
+{\
+    for (int x = 0; GUARD(sizeof(b)), x < sizeof(b); ++x)\
+        b[x] = 0;\
+}
+
+// returns an in64_t, negative if error, non-negative if valid drops
+#define AMOUNT_TO_DROPS(amount_buffer)\
+     (((amount_buffer)[0] >> 7) ? -2 : (\
+     ((((uint64_t)((amount_buffer)[0])) & 0xb00111111) << 56) +\
+      (((uint64_t)((amount_buffer)[1])) << 48) +\
+      (((uint64_t)((amount_buffer)[2])) << 40) +\
+      (((uint64_t)((amount_buffer)[3])) << 32) +\
+      (((uint64_t)((amount_buffer)[4])) << 24) +\
+      (((uint64_t)((amount_buffer)[5])) << 16) +\
+      (((uint64_t)((amount_buffer)[6])) <<  8) +\
+      (((uint64_t)((amount_buffer)[7])))))
+
+#define SUB_OFFSET(x) ((int32_t)(x >> 32))
+#define SUB_LENGTH(x) ((int32_t)(x & 0xFFFFFFFFULL))
+
+// when using this macro buf1len may be dynamic but buf2len must be static
+// provide n >= 1 to indicate how many times the macro will be hit on the line of code
+// e.g. if it is in a loop that loops 10 times n = 10
+
+#define BUFFER_EQUAL_GUARD(output, buf1, buf1len, buf2, buf2len, n)\
+{\
+    output = ((buf1len) == (buf2len) ? 1 : 0);\
+    for (int x = 0; GUARDM( (buf2len) * (n), 1 ), output && x < (buf2len);\
+         ++x)\
+        output = (buf1)[x] == (buf2)[x];\
+}
+
+#define BUFFER_SWAP(x,y)\
+{\
+    uint8_t* z = x;\
+    x = y;\
+    y = z;\
+}
+
+#define ACCOUNT_COMPARE(compare_result, buf1, buf2)\
+{\
+    compare_result = 0;\
+    for (int i = 0; GUARD(20), i < 20; ++i)\
+    {\
+        if (buf1[i] > buf2[i])\
+        {\
+            compare_result = 1;\
+            break;\
+        }\
+        else if (buf1[i] < buf2[i])\
+        {\
+            compare_result = -1;\
+            break;\
+        }\
+    }\
+}
+
+#define BUFFER_EQUAL_STR_GUARD(output, buf1, buf1len, str, n)\
+    BUFFER_EQUAL_GUARD(output, buf1, buf1len, str, (sizeof(str)-1), n)
+
+#define BUFFER_EQUAL_STR(output, buf1, buf1len, str)\
+    BUFFER_EQUAL_GUARD(output, buf1, buf1len, str, (sizeof(str)-1), 1)
+
+#define BUFFER_EQUAL(output, buf1, buf2, compare_len)\
+    BUFFER_EQUAL_GUARD(output, buf1, compare_len, buf2, compare_len, 1)
+
+#define UINT16_TO_BUF(buf_raw, i)\
+{\
+    unsigned char* buf = (unsigned char*)buf_raw;\
+    buf[0] = (((uint64_t)i) >> 8) & 0xFFUL;\
+    buf[1] = (((uint64_t)i) >> 0) & 0xFFUL;\
+}
+
+#define UINT16_FROM_BUF(buf)\
+    (((uint64_t)((buf)[0]) <<  8) +\
+     ((uint64_t)((buf)[1]) <<  0))
+
+#define UINT32_TO_BUF(buf_raw, i)\
+{\
+    unsigned char* buf = (unsigned char*)buf_raw;\
+    buf[0] = (((uint64_t)i) >> 24) & 0xFFUL;\
+    buf[1] = (((uint64_t)i) >> 16) & 0xFFUL;\
+    buf[2] = (((uint64_t)i) >>  8) & 0xFFUL;\
+    buf[3] = (((uint64_t)i) >>  0) & 0xFFUL;\
+}
+
+
+#define UINT32_FROM_BUF(buf)\
+    (((uint64_t)((buf)[0]) << 24) +\
+     ((uint64_t)((buf)[1]) << 16) +\
+     ((uint64_t)((buf)[2]) <<  8) +\
+     ((uint64_t)((buf)[3]) <<  0))
+
+#define UINT64_TO_BUF(buf_raw, i)\
+{\
+    unsigned char* buf = (unsigned char*)buf_raw;\
+    buf[0] = (((uint64_t)i) >> 56) & 0xFFUL;\
+    buf[1] = (((uint64_t)i) >> 48) & 0xFFUL;\
+    buf[2] = (((uint64_t)i) >> 40) & 0xFFUL;\
+    buf[3] = (((uint64_t)i) >> 32) & 0xFFUL;\
+    buf[4] = (((uint64_t)i) >> 24) & 0xFFUL;\
+    buf[5] = (((uint64_t)i) >> 16) & 0xFFUL;\
+    buf[6] = (((uint64_t)i) >>  8) & 0xFFUL;\
+    buf[7] = (((uint64_t)i) >>  0) & 0xFFUL;\
+}
+
+
+#define UINT64_FROM_BUF(buf)\
+    (((uint64_t)((buf)[0]) << 56) +\
+     ((uint64_t)((buf)[1]) << 48) +\
+     ((uint64_t)((buf)[2]) << 40) +\
+     ((uint64_t)((buf)[3]) << 32) +\
+     ((uint64_t)((buf)[4]) << 24) +\
+     ((uint64_t)((buf)[5]) << 16) +\
+     ((uint64_t)((buf)[6]) <<  8) +\
+     ((uint64_t)((buf)[7]) <<  0))
+
+
+#define INT64_FROM_BUF(buf)\
+   ((((uint64_t)((buf)[0]&7FU) << 56) +\
+     ((uint64_t)((buf)[1]) << 48) +\
+     ((uint64_t)((buf)[2]) << 40) +\
+     ((uint64_t)((buf)[3]) << 32) +\
+     ((uint64_t)((buf)[4]) << 24) +\
+     ((uint64_t)((buf)[5]) << 16) +\
+     ((uint64_t)((buf)[6]) <<  8) +\
+     ((uint64_t)((buf)[7]) <<  0)) * (buf[0] & 0x80U ? -1 : 1))
+
+#define INT64_TO_BUF(buf_raw, i)\
+{\
+    unsigned char* buf = (unsigned char*)buf_raw;\
+    buf[0] = (((uint64_t)i) >> 56) & 0x7FUL;\
+    buf[1] = (((uint64_t)i) >> 48) & 0xFFUL;\
+    buf[2] = (((uint64_t)i) >> 40) & 0xFFUL;\
+    buf[3] = (((uint64_t)i) >> 32) & 0xFFUL;\
+    buf[4] = (((uint64_t)i) >> 24) & 0xFFUL;\
+    buf[5] = (((uint64_t)i) >> 16) & 0xFFUL;\
+    buf[6] = (((uint64_t)i) >>  8) & 0xFFUL;\
+    buf[7] = (((uint64_t)i) >>  0) & 0xFFUL;\
+    if (i < 0) buf[0] |= 0x80U;\
+}
+
+#define ttPAYMENT 0
+#define ttCHECK_CREATE 16
+#define ttNFT_ACCEPT_OFFER 29
+#define tfCANONICAL 0x80000000UL
+
+#define atACCOUNT 1U
+#define atOWNER 2U
+#define atDESTINATION 3U
+#define atISSUER 4U
+#define atAUTHORIZE 5U
+#define atUNAUTHORIZE 6U
+#define atTARGET 7U
+#define atREGULARKEY 8U
+#define atPSEUDOCALLBACK 9U
+
+#define amAMOUNT 1U
+#define amBALANCE 2U
+#define amLIMITAMOUNT 3U
+#define amTAKERPAYS 4U
+#define amTAKERGETS 5U
+#define amLOWLIMIT 6U
+#define amHIGHLIMIT 7U
+#define amFEE 8U
+#define amSENDMAX 9U
+#define amDELIVERMIN 10U
+#define amMINIMUMOFFER 16U
+#define amRIPPLEESCROW 17U
+#define amDELIVEREDAMOUNT 18U
+
+/**
+ * RH NOTE -- PAY ATTENTION
+ *
+ * ALL 'ENCODE' MACROS INCREMENT BUF_OUT
+ * THIS IS TO MAKE CHAINING EASY
+ * BUF_OUT IS A SACRIFICIAL POINTER
+ *
+ * 'ENCODE' MACROS WITH CONSTANTS HAVE
+ * ALIASING TO ASSIST YOU WITH ORDER
+ * _TYPECODE_FIELDCODE_ENCODE_MACRO
+ * TO PRODUCE A SERIALIZED OBJECT
+ * IN CANONICAL FORMAT YOU MUST ORDER
+ * FIRST BY TYPE CODE THEN BY FIELD CODE
+ *
+ * ALL 'PREPARE' MACROS PRESERVE POINTERS
+ *
+ **/
+
+
+#define ENCODE_TL_SIZE 49
+#define ENCODE_TL(buf_out, tlamt, amount_type)\
+{\
+        uint8_t uat = amount_type; \
+        buf_out[0] = 0x60U +(uat & 0x0FU ); \
+        for (int i = 1; GUARDM(48, 1), i < 49; ++i)\
+            buf_out[i] = tlamt[i-1];\
+        buf_out += ENCODE_TL_SIZE;\
+}
+#define _06_XX_ENCODE_TL(buf_out, drops, amount_type )\
+    ENCODE_TL(buf_out, drops, amount_type );
+#define ENCODE_TL_AMOUNT(buf_out, drops )\
+    ENCODE_TL(buf_out, drops, amAMOUNT );
+#define _06_01_ENCODE_TL_AMOUNT(buf_out, drops )\
+    ENCODE_TL_AMOUNT(buf_out, drops );
+
+
+// Encode drops to serialization format
+// consumes 9 bytes
+#define ENCODE_DROPS_SIZE 9
+#define ENCODE_DROPS(buf_out, drops, amount_type ) \
+    {\
+        uint8_t uat = amount_type; \
+        uint64_t udrops = drops; \
+        buf_out[0] = 0x60U +(uat & 0x0FU ); \
+        buf_out[1] = 0b01000000 + (( udrops >> 56 ) & 0b00111111 ); \
+        buf_out[2] = (udrops >> 48) & 0xFFU; \
+        buf_out[3] = (udrops >> 40) & 0xFFU; \
+        buf_out[4] = (udrops >> 32) & 0xFFU; \
+        buf_out[5] = (udrops >> 24) & 0xFFU; \
+        buf_out[6] = (udrops >> 16) & 0xFFU; \
+        buf_out[7] = (udrops >>  8) & 0xFFU; \
+        buf_out[8] = (udrops >>  0) & 0xFFU; \
+        buf_out += ENCODE_DROPS_SIZE; \
+    }
+
+#define _06_XX_ENCODE_DROPS(buf_out, drops, amount_type )\
+    ENCODE_DROPS(buf_out, drops, amount_type );
+
+#define ENCODE_DROPS_AMOUNT(buf_out, drops )\
+    ENCODE_DROPS(buf_out, drops, amAMOUNT );
+#define _06_01_ENCODE_DROPS_AMOUNT(buf_out, drops )\
+    ENCODE_DROPS_AMOUNT(buf_out, drops );
+
+#define ENCODE_DROPS_FEE(buf_out, drops )\
+    ENCODE_DROPS(buf_out, drops, amFEE );
+#define _06_08_ENCODE_DROPS_FEE(buf_out, drops )\
+    ENCODE_DROPS_FEE(buf_out, drops );
+
+#define ENCODE_TT_SIZE 3
+#define ENCODE_TT(buf_out, tt )\
+    {\
+        uint8_t utt = tt;\
+        buf_out[0] = 0x12U;\
+        buf_out[1] =(utt >> 8 ) & 0xFFU;\
+        buf_out[2] =(utt >> 0 ) & 0xFFU;\
+        buf_out += ENCODE_TT_SIZE; \
+    }
+#define _01_02_ENCODE_TT(buf_out, tt)\
+    ENCODE_TT(buf_out, tt);
+
+
+#define ENCODE_ACCOUNT_SIZE 22
+#define ENCODE_ACCOUNT(buf_out, account_id, account_type)\
+    {\
+        uint8_t uat = account_type;\
+        buf_out[0] = 0x80U + uat;\
+        buf_out[1] = 0x14U;\
+        *(uint64_t*)(buf_out +  2) = *(uint64_t*)(account_id +  0);\
+        *(uint64_t*)(buf_out + 10) = *(uint64_t*)(account_id +  8);\
+        *(uint32_t*)(buf_out + 18) = *(uint32_t*)(account_id + 16);\
+        buf_out += ENCODE_ACCOUNT_SIZE;\
+    }
+#define _08_XX_ENCODE_ACCOUNT(buf_out, account_id, account_type)\
+    ENCODE_ACCOUNT(buf_out, account_id, account_type);
+
+#define ENCODE_ACCOUNT_SRC_SIZE 22
+#define ENCODE_ACCOUNT_SRC(buf_out, account_id)\
+    ENCODE_ACCOUNT(buf_out, account_id, atACCOUNT);
+#define _08_01_ENCODE_ACCOUNT_SRC(buf_out, account_id)\
+    ENCODE_ACCOUNT_SRC(buf_out, account_id);
+
+#define ENCODE_ACCOUNT_DST_SIZE 22
+#define ENCODE_ACCOUNT_DST(buf_out, account_id)\
+    ENCODE_ACCOUNT(buf_out, account_id, atDESTINATION);
+#define _08_03_ENCODE_ACCOUNT_DST(buf_out, account_id)\
+    ENCODE_ACCOUNT_DST(buf_out, account_id);
+
+#define ENCODE_ACCOUNT_OWNER_SIZE 22
+#define ENCODE_ACCOUNT_OWNER(buf_out, account_id) \
+    ENCODE_ACCOUNT(buf_out, account_id, atOWNER);
+#define _08_02_ENCODE_ACCOUNT_OWNER(buf_out, account_id) \
+    ENCODE_ACCOUNT_OWNER(buf_out, account_id);
+
+#define ENCODE_UINT32_COMMON_SIZE 5U
+#define ENCODE_UINT32_COMMON(buf_out, i, field)\
+    {\
+        uint32_t ui = i; \
+        uint8_t uf = field; \
+        buf_out[0] = 0x20U +(uf & 0x0FU); \
+        buf_out[1] =(ui >> 24 ) & 0xFFU; \
+        buf_out[2] =(ui >> 16 ) & 0xFFU; \
+        buf_out[3] =(ui >>  8 ) & 0xFFU; \
+        buf_out[4] =(ui >>  0 ) & 0xFFU; \
+        buf_out += ENCODE_UINT32_COMMON_SIZE; \
+    }
+#define _02_XX_ENCODE_UINT32_COMMON(buf_out, i, field)\
+    ENCODE_UINT32_COMMON(buf_out, i, field)\
+
+#define ENCODE_UINT32_UNCOMMON_SIZE 6U
+#define ENCODE_UINT32_UNCOMMON(buf_out, i, field)\
+    {\
+        uint32_t ui = i; \
+        uint8_t uf = field; \
+        buf_out[0] = 0x20U; \
+        buf_out[1] = uf; \
+        buf_out[2] =(ui >> 24 ) & 0xFFU; \
+        buf_out[3] =(ui >> 16 ) & 0xFFU; \
+        buf_out[4] =(ui >>  8 ) & 0xFFU; \
+        buf_out[5] =(ui >>  0 ) & 0xFFU; \
+        buf_out += ENCODE_UINT32_UNCOMMON_SIZE; \
+    }
+#define _02_XX_ENCODE_UINT32_UNCOMMON(buf_out, i, field)\
+    ENCODE_UINT32_UNCOMMON(buf_out, i, field)\
+
+#define ENCODE_LLS_SIZE 6U
+#define ENCODE_LLS(buf_out, lls )\
+    ENCODE_UINT32_UNCOMMON(buf_out, lls, 0x1B );
+#define _02_27_ENCODE_LLS(buf_out, lls )\
+    ENCODE_LLS(buf_out, lls );
+
+#define ENCODE_FLS_SIZE 6U
+#define ENCODE_FLS(buf_out, fls )\
+    ENCODE_UINT32_UNCOMMON(buf_out, fls, 0x1A );
+#define _02_26_ENCODE_FLS(buf_out, fls )\
+    ENCODE_FLS(buf_out, fls );
+
+#define ENCODE_TAG_SRC_SIZE 5
+#define ENCODE_TAG_SRC(buf_out, tag )\
+    ENCODE_UINT32_COMMON(buf_out, tag, 0x3U );
+#define _02_03_ENCODE_TAG_SRC(buf_out, tag )\
+    ENCODE_TAG_SRC(buf_out, tag );
+
+#define ENCODE_TAG_DST_SIZE 5
+#define ENCODE_TAG_DST(buf_out, tag )\
+    ENCODE_UINT32_COMMON(buf_out, tag, 0xEU );
+#define _02_14_ENCODE_TAG_DST(buf_out, tag )\
+    ENCODE_TAG_DST(buf_out, tag );
+
+#define ENCODE_SEQUENCE_SIZE 5
+#define ENCODE_SEQUENCE(buf_out, sequence )\
+    ENCODE_UINT32_COMMON(buf_out, sequence, 0x4U );
+#define _02_04_ENCODE_SEQUENCE(buf_out, sequence )\
+    ENCODE_SEQUENCE(buf_out, sequence );
+
+#define ENCODE_FLAGS_SIZE 5
+#define ENCODE_FLAGS(buf_out, tag )\
+    ENCODE_UINT32_COMMON(buf_out, tag, 0x2U );
+#define _02_02_ENCODE_FLAGS(buf_out, tag )\
+    ENCODE_FLAGS(buf_out, tag );
+
+#define ENCODE_SIGNING_PUBKEY_SIZE 35
+#define ENCODE_SIGNING_PUBKEY(buf_out, pkey )\
+    {\
+        buf_out[0] = 0x73U;\
+        buf_out[1] = 0x21U;\
+        *(uint64_t*)(buf_out +  2) = *(uint64_t*)(pkey +  0);\
+        *(uint64_t*)(buf_out + 10) = *(uint64_t*)(pkey +  8);\
+        *(uint64_t*)(buf_out + 18) = *(uint64_t*)(pkey + 16);\
+        *(uint64_t*)(buf_out + 26) = *(uint64_t*)(pkey + 24);\
+        buf[34] = pkey[32];\
+        buf_out += ENCODE_SIGNING_PUBKEY_SIZE;\
+    }
+
+#define _07_03_ENCODE_SIGNING_PUBKEY(buf_out, pkey )\
+    ENCODE_SIGNING_PUBKEY(buf_out, pkey );
+
+#define ENCODE_SIGNING_PUBKEY_NULL_SIZE 35
+#define ENCODE_SIGNING_PUBKEY_NULL(buf_out )\
+    {\
+        buf_out[0] = 0x73U;\
+        buf_out[1] = 0x21U;\
+        *(uint64_t*)(buf_out+2) = 0;\
+        *(uint64_t*)(buf_out+10) = 0;\
+        *(uint64_t*)(buf_out+18) = 0;\
+        *(uint64_t*)(buf_out+25) = 0;\
+        buf_out += ENCODE_SIGNING_PUBKEY_NULL_SIZE;\
+    }
+
+#define _07_03_ENCODE_SIGNING_PUBKEY_NULL(buf_out )\
+    ENCODE_SIGNING_PUBKEY_NULL(buf_out );
+
+
+#define PREPARE_PAYMENT_SIMPLE_SIZE 270
+#define PREPARE_PAYMENT_SIMPLE(buf_out_master, drops_amount_raw, to_address, dest_tag_raw, src_tag_raw)\
+    {\
+        uint8_t* buf_out = buf_out_master;\
+        uint8_t acc[20];\
+        uint64_t drops_amount = (drops_amount_raw);\
+        uint32_t dest_tag = (dest_tag_raw);\
+        uint32_t src_tag = (src_tag_raw);\
+        uint32_t cls = (uint32_t)ledger_seq();\
+        hook_account(SBUF(acc));\
+        _01_02_ENCODE_TT                   (buf_out, ttPAYMENT                      );      /* uint16  | size   3 */ \
+        _02_02_ENCODE_FLAGS                (buf_out, tfCANONICAL                    );      /* uint32  | size   5 */ \
+        _02_03_ENCODE_TAG_SRC              (buf_out, src_tag                        );      /* uint32  | size   5 */ \
+        _02_04_ENCODE_SEQUENCE             (buf_out, 0                              );      /* uint32  | size   5 */ \
+        _02_14_ENCODE_TAG_DST              (buf_out, dest_tag                       );      /* uint32  | size   5 */ \
+        _02_26_ENCODE_FLS                  (buf_out, cls + 1                        );      /* uint32  | size   6 */ \
+        _02_27_ENCODE_LLS                  (buf_out, cls + 5                        );      /* uint32  | size   6 */ \
+        _06_01_ENCODE_DROPS_AMOUNT         (buf_out, drops_amount                   );      /* amount  | size   9 */ \
+        uint8_t* fee_ptr = buf_out;\
+        _06_08_ENCODE_DROPS_FEE            (buf_out, 0                              );      /* amount  | size   9 */ \
+        _07_03_ENCODE_SIGNING_PUBKEY_NULL  (buf_out                                 );      /* pk      | size  35 */ \
+        _08_01_ENCODE_ACCOUNT_SRC          (buf_out, acc                            );      /* account | size  22 */ \
+        _08_03_ENCODE_ACCOUNT_DST          (buf_out, to_address                     );      /* account | size  22 */ \
+        etxn_details((uint32_t)buf_out, 138);                                               /* emitdet | size 138 */ \
+        int64_t fee = etxn_fee_base(buf_out_master, 270);                                                            \ 
+        _06_08_ENCODE_DROPS_FEE            (fee_ptr, fee                            );                               \
+    }
+
+#define PREPARE_PAYMENT_SIMPLE_TRUSTLINE_SIZE 309
+#define PREPARE_PAYMENT_SIMPLE_TRUSTLINE(buf_out_master, tlamt, drops_fee_raw, to_address, dest_tag_raw, src_tag_raw)\
+    {\
+        uint8_t* buf_out = buf_out_master;\
+        uint8_t acc[20];\
+        uint64_t drops_fee = (drops_fee_raw);\
+        uint32_t dest_tag = (dest_tag_raw);\
+        uint32_t src_tag = (src_tag_raw);\
+        uint32_t cls = (uint32_t)ledger_seq();\
+        hook_account(SBUF(acc));\
+        _01_02_ENCODE_TT                   (buf_out, ttPAYMENT                      );      /* uint16  | size   3 */ \
+        _02_02_ENCODE_FLAGS                (buf_out, tfCANONICAL                    );      /* uint32  | size   5 */ \
+        _02_03_ENCODE_TAG_SRC              (buf_out, src_tag                        );      /* uint32  | size   5 */ \
+        _02_04_ENCODE_SEQUENCE             (buf_out, 0                              );      /* uint32  | size   5 */ \
+        _02_14_ENCODE_TAG_DST              (buf_out, dest_tag                       );      /* uint32  | size   5 */ \
+        _02_26_ENCODE_FLS                  (buf_out, cls + 1                        );      /* uint32  | size   6 */ \
+        _02_27_ENCODE_LLS                  (buf_out, cls + 5                        );      /* uint32  | size   6 */ \
+        _06_01_ENCODE_TL_AMOUNT            (buf_out, tlamt                          );      /* amount  | size  48 */ \
+        uint8_t* fee_ptr = buf_out;\
+        _06_08_ENCODE_DROPS_FEE            (buf_out, drops_fee                      );      /* amount  | size   9 */ \
+        _07_03_ENCODE_SIGNING_PUBKEY_NULL  (buf_out                                 );      /* pk      | size  35 */ \
+        _08_01_ENCODE_ACCOUNT_SRC          (buf_out, acc                            );      /* account | size  22 */ \
+        _08_03_ENCODE_ACCOUNT_DST          (buf_out, to_address                     );      /* account | size  22 */ \
+        etxn_details((uint32_t)buf_out, 138);                                               /* emitdet | size 138 */ \
+        int64_t fee = etxn_fee_base(buf_out_master, 309);                                                            \ 
+        _06_08_ENCODE_DROPS_FEE            (fee_ptr, fee                            );                               \
+    }
+
+
+
+#endif
+
+
--- a/hook/examples/sfcodes.h
+++ b/hook/examples/sfcodes.h
@@ -0,0 +1,203 @@
+// For documentation please see: https://xrpl-hooks.readme.io/reference/
+// Generated using generate_sfcodes.sh
+#define sfCloseResolution ((16U << 16U) + 1U)
+#define sfMethod ((16U << 16U) + 2U)
+#define sfTransactionResult ((16U << 16U) + 3U)
+#define sfTickSize ((16U << 16U) + 16U)
+#define sfUNLModifyDisabling ((16U << 16U) + 17U)
+#define sfHookResult ((16U << 16U) + 18U)
+#define sfLedgerEntryType ((1U << 16U) + 1U)
+#define sfTransactionType ((1U << 16U) + 2U)
+#define sfSignerWeight ((1U << 16U) + 3U)
+#define sfTransferFee ((1U << 16U) + 4U)
+#define sfVersion ((1U << 16U) + 16U)
+#define sfHookStateChangeCount ((1U << 16U) + 17U)
+#define sfHookEmitCount ((1U << 16U) + 18U)
+#define sfHookExecutionIndex ((1U << 16U) + 19U)
+#define sfHookApiVersion ((1U << 16U) + 20U)
+#define sfFlags ((2U << 16U) + 2U)
+#define sfSourceTag ((2U << 16U) + 3U)
+#define sfSequence ((2U << 16U) + 4U)
+#define sfPreviousTxnLgrSeq ((2U << 16U) + 5U)
+#define sfLedgerSequence ((2U << 16U) + 6U)
+#define sfCloseTime ((2U << 16U) + 7U)
+#define sfParentCloseTime ((2U << 16U) + 8U)
+#define sfSigningTime ((2U << 16U) + 9U)
+#define sfExpiration ((2U << 16U) + 10U)
+#define sfTransferRate ((2U << 16U) + 11U)
+#define sfWalletSize ((2U << 16U) + 12U)
+#define sfOwnerCount ((2U << 16U) + 13U)
+#define sfDestinationTag ((2U << 16U) + 14U)
+#define sfHighQualityIn ((2U << 16U) + 16U)
+#define sfHighQualityOut ((2U << 16U) + 17U)
+#define sfLowQualityIn ((2U << 16U) + 18U)
+#define sfLowQualityOut ((2U << 16U) + 19U)
+#define sfQualityIn ((2U << 16U) + 20U)
+#define sfQualityOut ((2U << 16U) + 21U)
+#define sfStampEscrow ((2U << 16U) + 22U)
+#define sfBondAmount ((2U << 16U) + 23U)
+#define sfLoadFee ((2U << 16U) + 24U)
+#define sfOfferSequence ((2U << 16U) + 25U)
+#define sfFirstLedgerSequence ((2U << 16U) + 26U)
+#define sfLastLedgerSequence ((2U << 16U) + 27U)
+#define sfTransactionIndex ((2U << 16U) + 28U)
+#define sfOperationLimit ((2U << 16U) + 29U)
+#define sfReferenceFeeUnits ((2U << 16U) + 30U)
+#define sfReserveBase ((2U << 16U) + 31U)
+#define sfReserveIncrement ((2U << 16U) + 32U)
+#define sfSetFlag ((2U << 16U) + 33U)
+#define sfClearFlag ((2U << 16U) + 34U)
+#define sfSignerQuorum ((2U << 16U) + 35U)
+#define sfCancelAfter ((2U << 16U) + 36U)
+#define sfFinishAfter ((2U << 16U) + 37U)
+#define sfSignerListID ((2U << 16U) + 38U)
+#define sfSettleDelay ((2U << 16U) + 39U)
+#define sfTicketCount ((2U << 16U) + 40U)
+#define sfTicketSequence ((2U << 16U) + 41U)
+#define sfNFTokenTaxon ((2U << 16U) + 42U)
+#define sfMintedNFTokens ((2U << 16U) + 43U)
+#define sfBurnedNFTokens ((2U << 16U) + 44U)
+#define sfHookStateCount ((2U << 16U) + 45U)
+#define sfEmitGeneration ((2U << 16U) + 46U)
+#define sfIndexNext ((3U << 16U) + 1U)
+#define sfIndexPrevious ((3U << 16U) + 2U)
+#define sfBookNode ((3U << 16U) + 3U)
+#define sfOwnerNode ((3U << 16U) + 4U)
+#define sfBaseFee ((3U << 16U) + 5U)
+#define sfExchangeRate ((3U << 16U) + 6U)
+#define sfLowNode ((3U << 16U) + 7U)
+#define sfHighNode ((3U << 16U) + 8U)
+#define sfDestinationNode ((3U << 16U) + 9U)
+#define sfCookie ((3U << 16U) + 10U)
+#define sfServerVersion ((3U << 16U) + 11U)
+#define sfNFTokenOfferNode ((3U << 16U) + 12U)
+#define sfEmitBurden ((3U << 16U) + 13U)
+#define sfHookOn ((3U << 16U) + 16U)
+#define sfHookInstructionCount ((3U << 16U) + 17U)
+#define sfHookReturnCode ((3U << 16U) + 18U)
+#define sfReferenceCount ((3U << 16U) + 19U)
+#define sfEmailHash ((4U << 16U) + 1U)
+#define sfTakerPaysCurrency ((10U << 16U) + 1U)
+#define sfTakerPaysIssuer ((10U << 16U) + 2U)
+#define sfTakerGetsCurrency ((10U << 16U) + 3U)
+#define sfTakerGetsIssuer ((10U << 16U) + 4U)
+#define sfLedgerHash ((5U << 16U) + 1U)
+#define sfParentHash ((5U << 16U) + 2U)
+#define sfTransactionHash ((5U << 16U) + 3U)
+#define sfAccountHash ((5U << 16U) + 4U)
+#define sfPreviousTxnID ((5U << 16U) + 5U)
+#define sfLedgerIndex ((5U << 16U) + 6U)
+#define sfWalletLocator ((5U << 16U) + 7U)
+#define sfRootIndex ((5U << 16U) + 8U)
+#define sfAccountTxnID ((5U << 16U) + 9U)
+#define sfNFTokenID ((5U << 16U) + 10U)
+#define sfEmitParentTxnID ((5U << 16U) + 11U)
+#define sfEmitNonce ((5U << 16U) + 12U)
+#define sfEmitHookHash ((5U << 16U) + 13U)
+#define sfBookDirectory ((5U << 16U) + 16U)
+#define sfInvoiceID ((5U << 16U) + 17U)
+#define sfNickname ((5U << 16U) + 18U)
+#define sfAmendment ((5U << 16U) + 19U)
+#define sfDigest ((5U << 16U) + 21U)
+#define sfChannel ((5U << 16U) + 22U)
+#define sfConsensusHash ((5U << 16U) + 23U)
+#define sfCheckID ((5U << 16U) + 24U)
+#define sfValidatedHash ((5U << 16U) + 25U)
+#define sfPreviousPageMin ((5U << 16U) + 26U)
+#define sfNextPageMin ((5U << 16U) + 27U)
+#define sfNFTokenBuyOffer ((5U << 16U) + 28U)
+#define sfNFTokenSellOffer ((5U << 16U) + 29U)
+#define sfHookStateKey ((5U << 16U) + 30U)
+#define sfHookHash ((5U << 16U) + 31U)
+#define sfHookNamespace ((5U << 16U) + 32U)
+#define sfHookSetTxnID ((5U << 16U) + 33U)
+#define sfAmount ((6U << 16U) + 1U)
+#define sfBalance ((6U << 16U) + 2U)
+#define sfLimitAmount ((6U << 16U) + 3U)
+#define sfTakerPays ((6U << 16U) + 4U)
+#define sfTakerGets ((6U << 16U) + 5U)
+#define sfLowLimit ((6U << 16U) + 6U)
+#define sfHighLimit ((6U << 16U) + 7U)
+#define sfFee ((6U << 16U) + 8U)
+#define sfSendMax ((6U << 16U) + 9U)
+#define sfDeliverMin ((6U << 16U) + 10U)
+#define sfMinimumOffer ((6U << 16U) + 16U)
+#define sfRippleEscrow ((6U << 16U) + 17U)
+#define sfDeliveredAmount ((6U << 16U) + 18U)
+#define sfNFTokenBrokerFee ((6U << 16U) + 19U)
+#define sfHookCallbackFee ((6U << 16U) + 20U)
+#define sfPublicKey ((7U << 16U) + 1U)
+#define sfMessageKey ((7U << 16U) + 2U)
+#define sfSigningPubKey ((7U << 16U) + 3U)
+#define sfTxnSignature ((7U << 16U) + 4U)
+#define sfURI ((7U << 16U) + 5U)
+#define sfSignature ((7U << 16U) + 6U)
+#define sfDomain ((7U << 16U) + 7U)
+#define sfFundCode ((7U << 16U) + 8U)
+#define sfRemoveCode ((7U << 16U) + 9U)
+#define sfExpireCode ((7U << 16U) + 10U)
+#define sfCreateCode ((7U << 16U) + 11U)
+#define sfMemoType ((7U << 16U) + 12U)
+#define sfMemoData ((7U << 16U) + 13U)
+#define sfMemoFormat ((7U << 16U) + 14U)
+#define sfFulfillment ((7U << 16U) + 16U)
+#define sfCondition ((7U << 16U) + 17U)
+#define sfMasterSignature ((7U << 16U) + 18U)
+#define sfUNLModifyValidator ((7U << 16U) + 19U)
+#define sfValidatorToDisable ((7U << 16U) + 20U)
+#define sfValidatorToReEnable ((7U << 16U) + 21U)
+#define sfHookStateData ((7U << 16U) + 22U)
+#define sfHookReturnString ((7U << 16U) + 23U)
+#define sfHookParameterName ((7U << 16U) + 24U)
+#define sfHookParameterValue ((7U << 16U) + 25U)
+#define sfAccount ((8U << 16U) + 1U)
+#define sfOwner ((8U << 16U) + 2U)
+#define sfDestination ((8U << 16U) + 3U)
+#define sfIssuer ((8U << 16U) + 4U)
+#define sfAuthorize ((8U << 16U) + 5U)
+#define sfUnauthorize ((8U << 16U) + 6U)
+#define sfRegularKey ((8U << 16U) + 8U)
+#define sfNFTokenMinter ((8U << 16U) + 9U)
+#define sfEmitCallback ((8U << 16U) + 10U)
+#define sfHookAccount ((8U << 16U) + 16U)
+#define sfIndexes ((19U << 16U) + 1U)
+#define sfHashes ((19U << 16U) + 2U)
+#define sfAmendments ((19U << 16U) + 3U)
+#define sfNFTokenOffers ((19U << 16U) + 4U)
+#define sfHookNamespaces ((19U << 16U) + 5U)
+#define sfPaths ((18U << 16U) + 1U)
+#define sfTransactionMetaData ((14U << 16U) + 2U)
+#define sfCreatedNode ((14U << 16U) + 3U)
+#define sfDeletedNode ((14U << 16U) + 4U)
+#define sfModifiedNode ((14U << 16U) + 5U)
+#define sfPreviousFields ((14U << 16U) + 6U)
+#define sfFinalFields ((14U << 16U) + 7U)
+#define sfNewFields ((14U << 16U) + 8U)
+#define sfTemplateEntry ((14U << 16U) + 9U)
+#define sfMemo ((14U << 16U) + 10U)
+#define sfSignerEntry ((14U << 16U) + 11U)
+#define sfNFToken ((14U << 16U) + 12U)
+#define sfEmitDetails ((14U << 16U) + 13U)
+#define sfHook ((14U << 16U) + 14U)
+#define sfSigner ((14U << 16U) + 16U)
+#define sfMajority ((14U << 16U) + 18U)
+#define sfDisabledValidator ((14U << 16U) + 19U)
+#define sfEmittedTxn ((14U << 16U) + 20U)
+#define sfHookExecution ((14U << 16U) + 21U)
+#define sfHookDefinition ((14U << 16U) + 22U)
+#define sfHookParameter ((14U << 16U) + 23U)
+#define sfHookGrant ((14U << 16U) + 24U)
+#define sfSigners ((15U << 16U) + 3U)
+#define sfSignerEntries ((15U << 16U) + 4U)
+#define sfTemplate ((15U << 16U) + 5U)
+#define sfNecessary ((15U << 16U) + 6U)
+#define sfSufficient ((15U << 16U) + 7U)
+#define sfAffectedNodes ((15U << 16U) + 8U)
+#define sfMemos ((15U << 16U) + 9U)
+#define sfNFTokens ((15U << 16U) + 10U)
+#define sfHooks ((15U << 16U) + 11U)
+#define sfMajorities ((15U << 16U) + 16U)
+#define sfDisabledValidators ((15U << 16U) + 17U)
+#define sfHookExecutions ((15U << 16U) + 18U)
+#define sfHookParameters ((15U << 16U) + 19U)
+#define sfHookGrants ((15U << 16U) + 20U)
--- a/hook/tests/hookapi/README.md
+++ b/hook/tests/hookapi/README.md
@@ -0,0 +1,2 @@
+# HookAPI Tests
+This test-set pertains to the behaviour of Hook APIs, which are tested by installing and running hooks that invoke those APIs.
--- a/hook/tests/hookapi/makefile
+++ b/hook/tests/hookapi/makefile
@@ -0,0 +1,2 @@
+all:
+	(cd wasm; touch *.c ;  make)
--- a/hook/tests/hookapi/run-all.sh
+++ b/hook/tests/hookapi/run-all.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+RESULT=""
+FAILCOUNT=0
+PASSCOUNT=0
+for i in `ls test-*.js`; do
+    echo Running $i
+    node $i 2>/dev/null >/dev/null;
+    if [ "$?" -eq "0" ];
+    then       
+        RESULT=`echo $RESULT'~'$i' -- PASS'`
+        PASSCOUNT="`echo $PASSCOUNT + 1 | bc`"
+    else
+        RESULT=`echo $RESULT'~'$i' -- FAIL'`
+        FAILCOUNT="`echo $FAILCOUNT + 1 | bc`"
+    fi
+done
+echo
+echo "Results:"
+RESULT=$RESULT~
+echo Passed: $PASSCOUNT, Failed: $FAILCOUNT, Total: `echo $PASSCOUNT + $FAILCOUNT | bc`
+echo $RESULT | sed 's/.js//g' | tr '~' '\n'
--- a/hook/tests/hookapi/test-log.js
+++ b/hook/tests/hookapi/test-log.js
@@ -0,0 +1,40 @@
+const wasmFn = 'log.wasm';
+
+require('../hookset/utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm(wasmFn),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            t.feeSubmit(account.seed,
+            {
+                TransactionType: "AccountSet",
+                Account: account.classicAddress
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                process.exit(0);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookapi/test-root.js
+++ b/hook/tests/hookapi/test-root.js
@@ -0,0 +1,40 @@
+const wasmFn = 'root.wasm';
+
+require('../hookset/utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm(wasmFn),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            t.feeSubmit(account.seed,
+            {
+                TransactionType: "AccountSet",
+                Account: account.classicAddress
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                process.exit(0);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookapi/wasm/api.h
+++ b/hook/tests/hookapi/wasm/api.h
@@ -0,0 +1,7 @@
+#include <stdint.h>
+#include "../../../examples/hookapi.h"
+#define ASSERT(x)\
+{\
+    if (!(x))\
+        rollback(SBUF(#x), __LINE__);\
+}
--- a/hook/tests/hookapi/wasm/log.c
+++ b/hook/tests/hookapi/wasm/log.c
@@ -0,0 +1,19 @@
+#include "api.h"
+
+int64_t hook(uint32_t reserved )
+{
+    int64_t x = float_set(0, 1234567890);
+    int64_t l = float_log(x);
+    int64_t i = float_int(l, 15, 1);
+
+    ASSERT(i == 9091514977169268ULL);
+
+    ASSERT(float_log(float_one()) == 0);
+
+    // RH TODO: more tests
+
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookapi/wasm/makefile
+++ b/hook/tests/hookapi/wasm/makefile
@@ -0,0 +1,7 @@
+all: log.wasm root.wasm
+log.wasm: log.c
+	wasmcc log.c -o log.wasm -O0 -Wl,--allow-undefined -I../
+	hook-cleaner log.wasm
+root.wasm: root.c
+	wasmcc root.c -o root.wasm -O0 -Wl,--allow-undefined -I../
+	hook-cleaner root.wasm
--- a/hook/tests/hookapi/wasm/root.c
+++ b/hook/tests/hookapi/wasm/root.c
@@ -0,0 +1,21 @@
+#include "api.h"
+
+int64_t hook(uint32_t reserved )
+{
+    int64_t x = float_set(0, 1234567890);
+    int64_t l = float_root(x, 2);
+    TRACEXFL(l);
+    int64_t i = float_int(l, 6, 1);
+
+    TRACEVAR(i);
+
+    ASSERT(i == 35136418286444ULL);
+
+
+    // RH TODO: more tests
+
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/makefile
+++ b/hook/tests/hookset/makefile
@@ -0,0 +1,2 @@
+all:
+	(cd wasm; make)
--- a/hook/tests/hookset/package.json
+++ b/hook/tests/hookset/package.json
@@ -0,0 +1,18 @@
+{
+  "dependencies": {
+    "ripple-keypairs": "^1.1.3",
+    "ripple-lib": "^1.10.0",
+    "xrpl": "^2.1.1",
+    "xrpl-binary-codec": "^1.4.2",
+    "xrpl-hooks": "^2.2.1"
+  },
+  "name": "hookset",
+  "description": "This test set pertains to testing the functionality of installing / creating / updating / deleting hooks. In short: everything except running hooks.",
+  "version": "1.0.0",
+  "main": "''",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC"
+}
--- a/hook/tests/hookset/run-all.sh
+++ b/hook/tests/hookset/run-all.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+RESULT=""
+FAILCOUNT=0
+PASSCOUNT=0
+for i in `ls test-*.js`; do
+    echo Running $i
+    node $i 2>/dev/null >/dev/null;
+    if [ "$?" -eq "0" ];
+    then       
+        RESULT=`echo $RESULT'~'$i' -- PASS'`
+        PASSCOUNT="`echo $PASSCOUNT + 1 | bc`"
+    else
+        RESULT=`echo $RESULT'~'$i' -- FAIL'`
+        FAILCOUNT="`echo $FAILCOUNT + 1 | bc`"
+    fi
+done
+echo
+echo "Results:"
+RESULT=$RESULT~
+echo Passed: $PASSCOUNT, Failed: $FAILCOUNT, Total: `echo $PASSCOUNT + $FAILCOUNT | bc`
+echo $RESULT | sed 's/.js//g' | tr '~' '\n'
--- a/hook/tests/hookset/test-aaw.js
+++ b/hook/tests/hookset/test-aaw.js
@@ -0,0 +1,42 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account1 =  t.randomAccount();
+    const account2 =  t.randomAccount();
+    t.fundFromGenesis(account1).then(()=>
+    {
+        t.fundFromGenesis(account2).then(()=>
+        {
+            t.feeSubmit(account1.seed,
+            {
+                Account: account1.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {
+                        Hook: {
+                            CreateCode: t.wasm('aaw.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                t.feeSubmit(account2.seed,
+                {
+                    Account: account2.classicAddress,
+                    TransactionType: "AccountSet"
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    process.exit(0);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-create-3.js
+++ b/hook/tests/hookset/test-create-3.js
@@ -0,0 +1,30 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('blacklist.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            process.exit(0);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-create.js
+++ b/hook/tests/hookset/test-create.js
@@ -0,0 +1,48 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('accept.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            t.feeSubmit(account.seed,
+            {
+                Account: account.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {
+                        Hook: {
+                            CreateCode: t.wasm('accept.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnFailure(x)
+                process.exit(0);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-delete.js
+++ b/hook/tests/hookset/test-delete.js
@@ -0,0 +1,61 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  (process.argv.length < 3 ? t.randomAccount() :
+        t.xrpljs.Wallet.fromSeed(process.argv[2]));
+    
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [{Hook:{}}],
+            Fee: "100000"
+        }, {wallet: account}).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x)
+            t.feeSubmit(account.seed,
+            {
+                Account: account.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {
+                        Hook: {
+                            Flags: t.hsfOVERRIDE,
+                            CreateCode: t.wasm('accept.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                t.feeSubmit(account.seed,
+                {
+                    Account: account.classicAddress,
+                    TransactionType: "SetHook",
+                    Hooks: [
+                        {
+                            Hook: {
+                                Flags: t.hsfOVERRIDE,
+                                CreateCode: ""          // hook delete
+                            }
+                        }
+                    ],
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    console.log(x);
+                    process.exit(0);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-fee-2.js
+++ b/hook/tests/hookset/test-fee-2.js
@@ -0,0 +1,53 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        let txn_to_send = 
+        {
+            SigningPubKey: '',
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('accept.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ],
+            SigningPubKey: ''
+        };
+
+        let wal = t.xrpljs.Wallet.fromSeed(account.seed);
+        t.api.prepareTransaction(txn_to_send, {wallet: wal}).then(txn => 
+        {
+            let ser = t.rbc.encode(txn);
+            t.fee(ser).then(fees =>
+            {
+                console.log(fees)
+                let base_drops = fees.base_fee 
+                console.log("base_drops", base_drops)
+                
+                delete txn_to_send['SigningPubKey']
+                txn_to_send['Fee'] = base_drops + '';
+
+                t.api.prepareTransaction(txn_to_send, {wallet: wal}).then(txn => 
+                {
+                    console.log(txn)
+                    t.api.submit(txn, {wallet: wal}).then(s=>
+                    {
+                        t.assertTxnSuccess(s);
+                        console.log(s);
+                        process.exit(0);
+                    }).catch(t.err);
+                }).catch(t.err);
+            });
+
+
+        }).catch(t.err);
+    }).catch(t.err);
+});
+
--- a/hook/tests/hookset/test-fee-4.js
+++ b/hook/tests/hookset/test-fee-4.js
@@ -0,0 +1,27 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed, 
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('accept.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(s => {
+            t.assertTxnSuccess(s);
+            console.log(s);
+            process.exit(0);
+        }).catch(t.err);
+    }).catch(t.err);
+});
+
--- a/hook/tests/hookset/test-guard-1.js
+++ b/hook/tests/hookset/test-guard-1.js
@@ -0,0 +1,38 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('multiguard.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            t.feeSubmit(account.seed,
+            {
+                Account: account.classicAddress,
+                TransactionType: "AccountSet"
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                process.exit(0);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-install.js
+++ b/hook/tests/hookset/test-install.js
@@ -0,0 +1,99 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    const account2 = t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.fundFromGenesis(account2).then(()=>
+        {
+
+            let hash = t.hookHash('checkstate.wasm')
+            t.feeSubmit(account.seed,
+            {
+                Account: account.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {    Hook: {
+                            CreateCode: t.wasm('checkstate.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x)
+                t.feeSubmit(account2.seed,
+                {
+                    Account: account2.classicAddress,
+                    TransactionType: "SetHook",
+                    Fee: "100000",
+                    Hooks: [
+                        { Hook: {
+                            HookHash: hash
+                        }},
+                        { Hook: {
+
+                        }},
+                        { Hook: {
+                            HookHash: hash
+                        }}
+                    ]
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    console.log(x);
+                    t.feeSubmit(account2.seed,
+                    {
+                        Account: account2.classicAddress,
+                        TransactionType: "SetHook",
+                        Flags: 0,
+                        Hooks: [
+                            { Hook: {
+                                "Flags": t.hsfOVERRIDE,
+                                "CreateCode": "",
+                            }}
+                        ]
+                    }).then(x=>
+                    {
+                        console.log(x);
+                        t.assertTxnSuccess(x);
+
+                        t.feeSubmit(account2.seed,
+                        {
+                            Account: account2.classicAddress,
+                            TransactionType: "SetHook",
+                            Flags: 0,
+                            Hooks: [
+                                {Hook:{}},
+                                {Hook:{}},
+                                { Hook: {
+                                    HookParameters:
+                                    [
+                                        {HookParameter: {
+                                            HookParameterName: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
+                                            HookParameterValue: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB"
+                                        }}
+                                    ]
+                                }}
+                            ]
+                        }).then(x=>
+                        {
+                            console.log(x);
+                            t.assertTxnSuccess(x);
+
+                            console.log("account 1 has the creation: ", account.classicAddress);
+                            console.log("account 2 has the install and delete and update: ", account2.classicAddress);
+                            process.exit(0);
+                        }).catch(t.err);
+                    }).catch(t.err);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-nft-accdel.js
+++ b/hook/tests/hookset/test-nft-accdel.js
@@ -0,0 +1,74 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account1 =  t.randomAccount();
+    const account2 =  t.randomAccount();
+    t.fundFromGenesis([account1, account2]).then(()=>
+    {
+        t.ledgerAccept(256).then(x=>
+        {
+            t.feeSubmitAccept(account1.seed,
+            {
+              NFTokenTaxon: 0,
+              TransactionType: "NFTokenMint",
+              Account: account1.classicAddress,
+              TransferFee: 314,
+              Flags: 8,
+              URI: "697066733A2F2F62616679626569676479727A74357366703775646D37687537367568377932366E6634646675796C71616266336F636C67747179353566627A6469",
+              Memos: [
+                    {
+                        "Memo": {
+                            "MemoType":
+                              "687474703A2F2F6578616D706C652E636F6D2F6D656D6F2F67656E65726963",
+                            "MemoData": "72656E74"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                console.log(x)
+                t.assertTxnSuccess(x)
+
+                const id = t.nftid(account1.classicAddress, 8, 314, 0, 0);
+
+                t.feeSubmit(account1.seed,
+                {
+                    TransactionType: "NFTokenCreateOffer",
+                    Account: account1.classicAddress,
+                    NFTokenID: id,
+                    Amount: "1",
+                    Flags: 1
+                }).then(x=>
+                {
+
+                    console.log(x);
+                    t.assertTxnSuccess(x)
+                    t.fetchMeta(x.result.tx_json.hash).then(m=>
+                    {
+                        // RH UPTO
+                        t.log(m);
+
+                        process.exit(0);
+                    }).catch(t.err);
+/*
+                    t.feeSubmit(account1.seed,
+                    {
+                        TransactionType: "AccountDelete",
+                        Account: account1.classicAddress,
+                        Destination: account2.classicAddress,
+                        Flags: 2147483648
+                    }).then(x=>
+                    {
+                        t.assertTxnSuccess(x)
+                        
+                        process.exit(0);
+                    });
+                    */
+
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-nft-mint.js
+++ b/hook/tests/hookset/test-nft-mint.js
@@ -0,0 +1,34 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account1 =  t.randomAccount();
+    t.fundFromGenesis(account1).then(()=>
+    {
+        t.feeSubmit(account1.seed,
+        {
+          NFTokenTaxon: 0,
+          TransactionType: "NFTokenMint",
+          Account: account1.classicAddress,
+          TransferFee: 314,
+          Flags: 8,
+          URI: "697066733A2F2F62616679626569676479727A74357366703775646D37687537367568377932366E6634646675796C71616266336F636C67747179353566627A6469",
+          Memos: [
+                {
+                    "Memo": {
+                        "MemoType":
+                          "687474703A2F2F6578616D706C652E636F6D2F6D656D6F2F67656E65726963",
+                        "MemoData": "72656E74"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+
+            console.log(x);
+            t.assertTxnSuccess(x)
+            process.exit(0);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-noop.js
+++ b/hook/tests/hookset/test-noop.js
@@ -0,0 +1,45 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('accept.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+            t.feeSubmit(account.seed,
+            {
+                Account: account.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {   Hook: { } },
+                    {   Hook: { } },
+                    {   Hook: { } },
+                    {   Hook: { } }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                process.exit(0);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-nsdelete-empty.js
+++ b/hook/tests/hookset/test-nsdelete-empty.js
@@ -0,0 +1,59 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('makestate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   Hook: {} },
+                {   Hook: {} },
+                {    Hook: {
+                        CreateCode: t.wasm('checkstate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ],
+            Fee: "100000"
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+                console.log(x);
+
+                t.feeSubmit(account.seed,
+                {
+                    Account: account.classicAddress,
+                    TransactionType: "SetHook",  
+                    Hooks: [
+                        {
+                            Hook: {
+                                Flags: t.hsfNSDELETE,
+                                HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF"
+                            }
+                        }
+                    ]
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    console.log(x);
+
+                    process.exit(0);
+                }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-nsdelete.js
+++ b/hook/tests/hookset/test-nsdelete.js
@@ -0,0 +1,67 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('makestate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   Hook: {} },
+                {   Hook: {} },
+                {    Hook: {
+                        CreateCode: t.wasm('checkstate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            t.api.submit(
+            {
+                Account: account.classicAddress,
+                TransactionType: "AccountSet",  // trigger hooks
+                Fee: "100000"
+            }, {wallet: account}).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+
+                t.feeSubmit(account.seed,
+                {
+                    Account: account.classicAddress,
+                    TransactionType: "SetHook",  
+                    Hooks: [
+                        {
+                            Hook: {
+                                Flags: t.hsfNSDELETE,
+                                HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF"
+                            }
+                        }
+                    ]
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    console.log(x);
+
+                    process.exit(0);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-state-accdel.js
+++ b/hook/tests/hookset/test-state-accdel.js
@@ -0,0 +1,71 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    const account2 =  t.randomAccount();
+    t.fundFromGenesis([account, account2]).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('makestate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   
+                    Hook: {
+                        CreateCode: t.wasm('makestate2.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "CAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00D",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   Hook: {} },
+                {    Hook: {
+                        CreateCode: t.wasm('checkstate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            t.api.submit(
+            {
+                Account: account.classicAddress,
+                TransactionType: "AccountSet",  // trigger hooks
+                Fee: "100000"
+            }, {wallet: account}).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                t.ledgerAccept(255).then(x=>
+                {
+                    // account delete
+                    t.feeSubmit(account.seed,
+                    {
+                        Account: account.classicAddress,
+                        TransactionType: "AccountDelete",
+                        Destination: account2.classicAddress,
+                        Flags: 2147483648
+                    }).then(x=>
+                    {
+                        console.log(x);
+                        t.assertTxnSuccess(x);
+                        process.exit(0);
+                    }).catch(t.err);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-state-rm.js
+++ b/hook/tests/hookset/test-state-rm.js
@@ -0,0 +1,83 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('makestate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {    Hook: {
+                        CreateCode: t.wasm('checkstate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   Hook: {} },
+                {   Hook: {} }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            t.api.submit(
+            {
+                Account: account.classicAddress,
+                TransactionType: "AccountSet",  // trigger hooks
+                Fee: "100000"
+            }, {wallet: account}).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+
+                t.feeSubmit(account.seed,
+                {
+                    Account: account.classicAddress,
+                    TransactionType: "SetHook",
+                    Hooks: [
+                        {
+                            Hook: {
+                                CreateCode: t.wasm("rmstate.wasm"),
+                                HookApiVersion: 0,
+                                HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                                HookOn: "0000000000000000",
+                                Flags: t.hsfOVERRIDE
+                            },
+                        },
+                        {
+                            Hook: {
+                                Flags: t.hsfOVERRIDE,
+                                CreateCode: ""
+                            }
+                        }
+                    ]
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    t.api.submit(
+                    {
+                        Account: account.classicAddress,
+                        TransactionType: "AccountSet",  // trigger hooks
+                        Fee: "100000"
+                    }, {wallet: account}).then(x=>
+                    {
+                        t.assertTxnSuccess(x);
+                        process.exit(0);
+                    });
+                });
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-state.js
+++ b/hook/tests/hookset/test-state.js
@@ -0,0 +1,55 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account =  t.randomAccount();
+    t.fundFromGenesis(account).then(()=>
+    {
+        t.feeSubmit(account.seed,
+        {
+            Account: account.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook: {
+                        CreateCode: t.wasm('makestate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   
+                    Hook: {
+                        CreateCode: t.wasm('makestate2.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "CAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00DCAFEF00D",
+                        HookOn: "0000000000000000"
+                    }
+                },
+                {   Hook: {} },
+                {    Hook: {
+                        CreateCode: t.wasm('checkstate.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000"
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            t.api.submit(
+            {
+                Account: account.classicAddress,
+                TransactionType: "AccountSet",  // trigger hooks
+                Fee: "100000"
+            }, {wallet: account}).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                process.exit(0);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-tsh-2.js
+++ b/hook/tests/hookset/test-tsh-2.js
@@ -0,0 +1,53 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account1 =  t.randomAccount();
+    const account2 =  t.randomAccount();
+    t.fundFromGenesis(account1).then(()=>
+    {
+        t.fundFromGenesis(account2).then(()=>
+        {
+            t.feeSubmit(account1.seed,
+            {
+                Account: account1.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {
+                        Hook: {
+                            CreateCode: t.wasm('rollback.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                t.feeSubmit(account2.seed,
+                {
+                    Account: account2.classicAddress,
+                    TransactionType: "SignerListSet",
+                    SignerQuorum: 1,
+                    SignerEntries:
+                    [
+                        {
+                            SignerEntry:
+                            {
+                                Account: account1.classicAddress,
+                                SignerWeight: 1
+                            }
+                        }
+                    ]
+                }).then(x=>
+                {
+                    t.assertTxnFailure(x)
+                    process.exit(0);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-tsh-dex.js
+++ b/hook/tests/hookset/test-tsh-dex.js
@@ -0,0 +1,115 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>{
+    const holder1 =  t.randomAccount();
+    const holder2 =  t.randomAccount();
+    const holder3 =  t.randomAccount();
+    const holder4 =  t.randomAccount();
+    const issuer = t.randomAccount();
+
+
+    t.fundFromGenesis([issuer, holder1, holder2, holder3, holder4]).then(()=>
+    {
+        t.setTshCollect([holder1, holder2, holder3, holder4]).then(()=>
+        {
+            t.trustSet(issuer, "IOU", 10000, [holder1,holder2,holder3,holder4]).then(()=>
+            {
+                t.feeSubmitAcceptMultiple(
+                {
+                    TransactionType: "SetHook",
+                    Hooks: [
+                        {
+                            Hook:
+                            {
+                                CreateCode: t.wasm('aaw.wasm'),
+                                HookApiVersion: 0,
+                                HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                                HookOn: "0000000000000000",
+                                Flags: t.hsfCOLLECT
+                            }
+                        }
+                    ]
+                }, [holder1,holder2,holder3,holder4]).then(()=>
+                {
+
+                    req = {};
+
+                    req[holder1.classicAddress] = 500;
+                    req[holder2.classicAddress] = 200;
+                    req[holder3.classicAddress] = 80;
+
+                    t.issueTokens(issuer, "IOU", req).then(()=>
+                    {
+
+                        const coffer = (offerer, issuer, currency, iouamount, dropsamount, buying) =>
+                        {
+                            if (typeof(issuer.classicAddress) != 'undefined')
+                                issuer = issuer.classicAddress;
+
+                            return new Promise((resolve, reject) =>
+                            {
+                                let txn = 
+                                {
+                                    Account: offerer.classicAddress,
+                                    TransactionType: "OfferCreate",
+                                };
+
+                                let key1 = (buying ? "TakerGets" : "TakerPays");
+                                let key2 = (buying ? "TakerPays" : "TakerGets");
+
+                                txn[key1] = dropsamount + "";
+                                txn[key2] = {
+                                    "currency": currency,
+                                    "issuer": issuer,
+                                    "value": iouamount + ""
+                                };
+
+                                t.feeSubmitAccept(offerer.seed, txn).then(x=>
+                                {
+                                    console.log(x);
+                                    t.assertTxnSuccess(x);
+                                    resolve(x);
+                                }).catch(e=>reject(e));
+                            });
+                        };
+
+                        coffer(holder1, issuer, "IOU", 10, 250000, false).then(()=>         //  q= 25000
+                        {
+                            coffer(holder2, issuer, "IOU", 12, 100000, false).then(()=>     //  q= 8333
+                            {
+                                coffer(holder3, issuer, "IOU", 14, 80000, false).then(()=>  //  q= 5714 
+                                {
+                                    coffer(holder4, issuer, "IOU", 30, 350000, true).then((x)=>
+                                    {
+                                        t.ledgerAccept().then(()=>
+                                        {
+                                            t.fetchMetaHookExecutions(x).then(h=>
+                                            {
+                                                t.fetchMeta(x).then(m=>
+                                                {
+                                                    t.log(x);
+                                                    delete m.HookExecutions;
+                                                    t.log(m);
+                                                    t.log(h);
+                                                    console.log("Issuer:", issuer.classicAddress);
+                                                    console.log("Holder 1: ", holder1.classicAddress);
+                                                    console.log("Holder 2: ", holder2.classicAddress);
+                                                    console.log("Holder 3: ", holder3.classicAddress);
+                                                    console.log("Buyer: ", holder4.classicAddress);
+                                                    console.log("(cd b; ./rippled book_offers XRP 'IOU/" + issuer.classicAddress + "');");
+                                                    console.log("(cd b; ./rippled account_lines " + issuer.classicAddress + ");");
+                                                    process.exit(0);
+                                                }).catch(t.err);
+                                            }).catch(t.err);
+                                        }).catch(t.err);
+                                    }).catch(t.err);
+                                }).catch(t.err);
+                            }).catch(t.err);
+                        }).catch(t.err);
+                    }).catch(t.err);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-tsh-trust-nocollect-1.js
+++ b/hook/tests/hookset/test-tsh-trust-nocollect-1.js
@@ -0,0 +1,55 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>{
+    const holder1 =  t.randomAccount();
+    const issuer = t.randomAccount();
+
+    
+
+    t.fundFromGenesis([issuer, holder1]).then(()=>
+    {
+        t.feeSubmitAccept(issuer.seed,
+        {
+            Account: issuer.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook:
+                    {
+                        CreateCode: t.wasm('aaw.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000",
+                        Flags: t.hsfCOLLECT
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+
+            t.feeSubmitAccept(holder1.seed,
+            {
+                Account: holder1.classicAddress,
+                TransactionType: "TrustSet",
+                LimitAmount: {
+                    "currency": "IOU",
+                    "issuer": issuer.classicAddress,
+                    "value": "1000"
+                }
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                t.fetchMetaHookExecutions(x, t.wasmHash('aaw.wasm')).then(m=>
+                {
+                    t.assert(m.length == 0, "hook executed when it should not");
+                    console.log(m);
+                    process.exit(0);
+                }).catch(t.err);
+            }).catch(t.err);
+        });
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-tsh-trust-nocollect-2.js
+++ b/hook/tests/hookset/test-tsh-trust-nocollect-2.js
@@ -0,0 +1,65 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>{
+    const holder1 =  t.randomAccount();
+    const issuer = t.randomAccount();
+
+    
+
+    t.fundFromGenesis([issuer, holder1]).then(()=>
+    {
+        t.feeSubmitAccept(issuer.seed,
+        {
+            Account: issuer.classicAddress,
+            TransactionType: "AccountSet",
+            SetFlag: t.asfTshCollect
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+
+            t.feeSubmitAccept(issuer.seed,
+            {
+                Account: issuer.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {
+                        Hook:
+                        {
+                            CreateCode: t.wasm('aaw.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ]
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x);
+                console.log(x);
+
+                t.feeSubmitAccept(holder1.seed,
+                {
+                    Account: holder1.classicAddress,
+                    TransactionType: "TrustSet",
+                    LimitAmount: {
+                        "currency": "IOU",
+                        "issuer": issuer.classicAddress,
+                        "value": "1000"
+                    }
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    console.log(x);
+                    t.fetchMetaHookExecutions(x, t.wasmHash('aaw.wasm')).then(m=>
+                    {
+                        console.log(m);
+                        t.assert(m.length == 0, "hook executed when it should not");
+                        process.exit(0);
+                    });
+                }).catch(t.err);
+            }).catch(t.err);
+        });
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-tsh-trust.js
+++ b/hook/tests/hookset/test-tsh-trust.js
@@ -0,0 +1,67 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>{
+    const holder1 =  t.randomAccount();
+    const issuer = t.randomAccount();
+
+    
+
+    t.fundFromGenesis([issuer, holder1]).then(()=>
+    {
+        t.feeSubmitAccept(issuer.seed,
+        {
+            Account: issuer.classicAddress,
+            TransactionType: "SetHook",
+            Hooks: [
+                {
+                    Hook:
+                    {
+                        CreateCode: t.wasm('aaw.wasm'),
+                        HookApiVersion: 0,
+                        HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                        HookOn: "0000000000000000",
+                        Flags: t.hsfCOLLECT
+                    }
+                }
+            ]
+        }).then(x=>
+        {
+            t.assertTxnSuccess(x)
+            console.log(x);
+
+            t.feeSubmitAccept(issuer.seed,
+            {
+                Account: issuer.classicAddress,
+                TransactionType: "AccountSet",
+                SetFlag: t.asfTshCollect
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x);
+                console.log(x);
+
+                t.feeSubmitAccept(holder1.seed,
+                {
+                    Account: holder1.classicAddress,
+                    TransactionType: "TrustSet",
+                    LimitAmount: {
+                        "currency": "IOU",
+                        "issuer": issuer.classicAddress,
+                        "value": "1000"
+                    }
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    console.log(x);
+                    t.fetchMetaHookExecutions(x, t.wasmHash('aaw.wasm')).then(m=>
+                    {
+                        t.assert(m.length == 1, "needed exactly one hook execution");
+                        t.assert(m[0].HookReturnCode == 100, "non-weak execution");
+                        console.log(m);
+                        process.exit(0);
+                    });
+                }).catch(t.err);
+            }).catch(t.err);
+        });
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/test-tsh.js
+++ b/hook/tests/hookset/test-tsh.js
@@ -0,0 +1,53 @@
+require('../../utils-tests.js').TestRig('ws://localhost:6005').then(t=>
+{
+    const account1 =  t.randomAccount();
+    const account2 =  t.randomAccount();
+    t.fundFromGenesis(account1).then(()=>
+    {
+        t.fundFromGenesis(account2).then(()=>
+        {
+            t.feeSubmit(account1.seed,
+            {
+                Account: account1.classicAddress,
+                TransactionType: "SetHook",
+                Hooks: [
+                    {
+                        Hook: {
+                            CreateCode: t.wasm('accept.wasm'),
+                            HookApiVersion: 0,
+                            HookNamespace: "DEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF",
+                            HookOn: "0000000000000000"
+                        }
+                    }
+                ],
+            }).then(x=>
+            {
+                t.assertTxnSuccess(x)
+                console.log(x);
+                t.feeSubmit(account2.seed,
+                {
+                    Account: account2.classicAddress,
+                    TransactionType: "SignerListSet",
+                    SignerQuorum: 1,
+                    SignerEntries:
+                    [
+                        {
+                            SignerEntry:
+                            {
+                                Account: account1.classicAddress,
+                                SignerWeight: 1
+                            }
+                        }
+                    ]
+                }).then(x=>
+                {
+                    t.assertTxnSuccess(x)
+                    process.exit(0);
+                }).catch(t.err);
+            }).catch(t.err);
+        }).catch(t.err);
+    }).catch(t.err);
+})
+
+
+
--- a/hook/tests/hookset/wasm/aaw.c
+++ b/hook/tests/hookset/wasm/aaw.c
@@ -0,0 +1,52 @@
+// RC:  50 : strong execution
+// RC: 100 : weak execution (collect call)
+// RC: 150 : again as weak (not collect / after strong)
+// RC: 200 : callback execution
+
+#include <stdint.h>
+
+extern int32_t _g       (uint32_t id, uint32_t maxiter);
+extern int64_t accept   (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t hook_again (void);
+extern int64_t trace( uint32_t, uint32_t, uint32_t, uint32_t, uint32_t);
+extern int64_t trace_num (uint32_t, uint32_t, uint64_t);
+extern int64_t meta_slot(uint32_t);
+extern int64_t slot(uint32_t, uint32_t, uint32_t);
+#define SBUF(x) (uint32_t)((void*)x), sizeof(x)
+int64_t cbak(uint32_t what)
+{ 
+    accept (SBUF("Callback execution"),200);
+}
+
+int64_t hook(uint32_t reserved )
+{
+    if (reserved == 0)
+    {
+        hook_again();
+        
+        accept (SBUF("Strong execution"),50); 
+    }
+    
+
+    int64_t result = 
+        meta_slot(1);
+
+    trace_num(SBUF("meta_slot(1): "), result);
+
+
+    uint8_t dump[1024];
+    result = slot(SBUF(dump), 1);
+    trace_num(SBUF("slot(1): "), result);
+
+    trace(SBUF("dumped txmeta:"), dump, result, 1);
+
+    if (reserved == 1)
+        accept(SBUF("Weak execution (COLLECT)"), 100);
+    else
+        accept(SBUF("AAW execution"), 150);
+
+
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/accept.c
+++ b/hook/tests/hookset/wasm/accept.c
@@ -0,0 +1,20 @@
+/**
+ * This hook just accepts any transaction coming through it
+ */
+#include <stdint.h>
+
+extern int32_t _g       (uint32_t id, uint32_t maxiter);
+extern int64_t accept   (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+
+int64_t cbak(uint32_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved )
+{
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/accept64.c
+++ b/hook/tests/hookset/wasm/accept64.c
@@ -0,0 +1,20 @@
+/**
+ * This hook just accepts any transaction coming through it
+ */
+#include <stdint.h>
+
+extern int32_t _g       (uint32_t id, uint32_t maxiter);
+extern int64_t accept   (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+
+int64_t cbak(int64_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(int64_t reserved )
+{
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/checkstate.c
+++ b/hook/tests/hookset/wasm/checkstate.c
@@ -0,0 +1,42 @@
+#include <stdint.h>
+
+
+extern int32_t _g           (uint32_t id, uint32_t maxiter);
+extern int64_t rollback     (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t accept       (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t state        (uint32_t read_ptr, uint32_t read_len, uint32_t kread_ptr, uint32_t kread_len);
+extern int64_t trace_num    (uint32_t a, uint32_t b, uint64_t i);
+#define SBUF(x) x, sizeof(x)
+#define GUARD(n) _g(__LINE__, n+1)
+int64_t cbak(uint32_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved )
+{
+
+    uint8_t test[] = "hello world!";
+    
+    uint8_t test_key[32];
+    for (int i = 0; GUARD(32), i < 32; ++i)
+        test_key[i] = i;
+
+    uint8_t buf[128];
+    int64_t result = state(SBUF(buf), SBUF(test_key));
+
+    if (result <= 0)
+    {
+        trace_num(SBUF("state call failed"), result);
+        rollback(SBUF("state call failed"), 2);
+    }
+    for (int i = 0; GUARD(sizeof(test)+1), i < sizeof(test); ++i)
+        if (test[i] != buf[i])
+            rollback(SBUF("hook state did not match expected value"), 1);
+
+    
+    accept(SBUF("hook state matched expected value"),0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/ginv.c
+++ b/hook/tests/hookset/wasm/ginv.c
@@ -0,0 +1,16 @@
+#include <stdint.h>
+
+extern int32_t volatile _g       (uint32_t id, uint32_t maxiter);
+extern int64_t accept   (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t trace_num(uint32_t, uint32_t, int64_t);
+int64_t hook(uint32_t r)
+{
+    const int x = r;
+    for (int i = 0; trace_num(0,0,0), _g(11, 12), i < 5; ++i)
+    {
+        trace_num("hi", 2, i);
+    }
+
+    accept(0,0,0);
+    return 0;
+}
--- a/hook/tests/hookset/wasm/makefile
+++ b/hook/tests/hookset/wasm/makefile
@@ -0,0 +1,31 @@
+all: accept.wasm makestate.wasm makestate2.wasm checkstate.wasm rollback.wasm aaw.wasm rmstate.wasm ginv.wasm multiguard.wasm
+accept.wasm: accept.c
+	wasmcc accept.c -o accept.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner accept.wasm
+rollback.wasm: rollback.c
+	wasmcc rollback.c -o rollback.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner rollback.wasm
+makestate.wasm: makestate.c
+	wasmcc makestate.c -o makestate.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner makestate.wasm
+makestate2.wasm: makestate2.c
+	wasmcc makestate2.c -o makestate2.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner makestate2.wasm
+checkstate.wasm: checkstate.c
+	wasmcc checkstate.c -o checkstate.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner checkstate.wasm
+rmstate.wasm: rmstate.c
+	wasmcc rmstate.c -o rmstate.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner rmstate.wasm
+aaw.wasm: aaw.c
+	wasmcc aaw.c -o aaw.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner aaw.wasm
+ginv.wasm: ginv.c
+	wasmcc ginv.c -o ginv.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner ginv.wasm
+multiguard.wasm: multiguard.c
+	wasmcc multiguard.c -o multiguard.wasm -O2 -Wl,--allow-undefined -I../
+	hook-cleaner multiguard.wasm
+
+
+
--- a/hook/tests/hookset/wasm/makestate.c
+++ b/hook/tests/hookset/wasm/makestate.c
@@ -0,0 +1,31 @@
+#include <stdint.h>
+
+extern int32_t _g           (uint32_t id, uint32_t maxiter);
+extern int64_t accept       (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t state_set    (uint32_t read_ptr, uint32_t read_len, uint32_t kread_ptr, uint32_t kread_len);
+extern int64_t trace_num    (uint32_t a, uint32_t b, uint64_t i);
+#define SBUF(x) x, sizeof(x)
+#define GUARD(n) _g(__LINE__, n+1)
+int64_t cbak(uint32_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved )
+{
+
+    uint8_t test[] = "hello world!";
+    trace_num(SBUF("location of test[]:"), test);
+    uint8_t test_key[32];
+    for (int i = 0; GUARD(32), i < 32; ++i)
+        test_key[i] = i;
+
+    int64_t result = state_set(SBUF(test), SBUF(test_key));
+    
+    trace_num(SBUF("state_set result:"), result);
+
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/makestate2.c
+++ b/hook/tests/hookset/wasm/makestate2.c
@@ -0,0 +1,37 @@
+#include <stdint.h>
+
+extern int32_t _g           (uint32_t id, uint32_t maxiter);
+extern int64_t accept       (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t state_set    (uint32_t read_ptr, uint32_t read_len, uint32_t kread_ptr, uint32_t kread_len);
+extern int64_t trace_num    (uint32_t a, uint32_t b, uint64_t i);
+#define SBUF(x) x, sizeof(x)
+#define GUARD(n) _g(__LINE__, n+1)
+int64_t cbak(uint32_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved )
+{
+
+    uint8_t test[] =  "hello world!";
+    uint8_t test2[] = "this is a much longer test string";
+    trace_num(SBUF("location of test[]:"), test);
+    uint8_t test_key[32];
+    for (int i = 0; GUARD(32), i < 32; ++i)
+        test_key[i] = i;
+
+    int64_t result = state_set(SBUF(test), SBUF(test_key));
+    
+    trace_num(SBUF("state_set result:"), result);
+
+    uint8_t zero_key[32];
+    result = state_set(SBUF(test2), SBUF(zero_key));
+    
+    trace_num(SBUF("state_set result:"), result);
+
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/multiguard.c
+++ b/hook/tests/hookset/wasm/multiguard.c
@@ -0,0 +1,31 @@
+/**
+ * This hook just accepts any transaction coming through it
+ */
+#include <stdint.h>
+
+extern int32_t _g       (uint32_t id, uint32_t maxiter);
+extern int64_t trace_num(uint32_t, uint32_t, int64_t);
+extern int64_t accept   (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+
+int64_t cbak(uint32_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved )
+{
+    for (int i = 0; i < 5; ++i)
+    {
+        _g(1,60);   // every hook needs to import guard function and use it at least once
+        int c = i * 2;
+        while(c--)
+        {
+            trace_num("hi", 2, c);
+            _g(2, 60); 
+        }
+        
+    }
+    accept (0,0,0); 
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/rmstate.c
+++ b/hook/tests/hookset/wasm/rmstate.c
@@ -0,0 +1,29 @@
+#include <stdint.h>
+
+extern int32_t _g           (uint32_t id, uint32_t maxiter);
+extern int64_t accept       (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+extern int64_t state_set    (uint32_t read_ptr, uint32_t read_len, uint32_t kread_ptr, uint32_t kread_len);
+extern int64_t trace_num    (uint32_t a, uint32_t b, uint64_t i);
+#define SBUF(x) x, sizeof(x)
+#define GUARD(n) _g(__LINE__, n+1)
+int64_t cbak(uint32_t what)
+{ 
+    return 0;
+}
+
+int64_t hook(uint32_t reserved )
+{
+
+    uint8_t test_key[32];
+    for (int i = 0; GUARD(32), i < 32; ++i)
+        test_key[i] = i;
+
+    int64_t result = state_set(0,0, SBUF(test_key));
+    
+    trace_num(SBUF("state_set result:"), result);
+
+    accept (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/tests/hookset/wasm/rollback.c
+++ b/hook/tests/hookset/wasm/rollback.c
@@ -0,0 +1,15 @@
+/**
+ * This hook just accepts any transaction coming through it
+ */
+#include <stdint.h>
+
+extern int32_t _g       (uint32_t id, uint32_t maxiter);
+extern int64_t rollback   (uint32_t read_ptr, uint32_t read_len, int64_t error_code);
+
+int64_t hook(uint32_t reserved )
+{
+    rollback (0,0,0); 
+    _g(1,1);   // every hook needs to import guard function and use it at least once
+    // unreachable
+    return 0;
+}
--- a/hook/utils-tests.js
+++ b/hook/utils-tests.js
@@ -0,0 +1,583 @@
+const fs = require('fs')
+const xrpljs = require('xrpl-hooks');
+const kp = require('ripple-keypairs');
+const crypto = require('crypto')
+
+const rbc = require('xrpl-binary-codec')
+const rac = require('ripple-address-codec');
+
+const err = (x) =>
+{
+    console.log(x); process.exit(1);
+}
+// Fails via process.exit
+module.exports = {
+    TestRig: (endpoint)=>
+    {
+        return new Promise((resolve, reject)=>
+        {
+                const api = new xrpljs.Client(endpoint);
+
+                const nftid = (acc, flags, fee, taxon, mintseq) =>
+                {
+                    if (typeof(acc.classicAddress) != "undefined")
+                        acc = acc.classicAddress;
+
+                    acc = rac.decodeAccountID(acc);
+                    const ts = mintseq;
+                    const tax =(taxon  ^ ((384160001 * ts) + 2459));
+                    const id = Buffer.from([
+                        (flags >> 8) & 0xFF,
+                        flags & 0xFF,
+                        (fee >> 8) & 0xFF,
+                        fee & 0xFF,
+                        acc[0],
+                        acc[1],
+                        acc[2],
+                        acc[3],
+                        acc[4],
+                        acc[5],
+                        acc[6],
+                        acc[7],
+                        acc[8],
+                        acc[9],
+                        acc[10],
+                        acc[11],
+                        acc[12],
+                        acc[13],
+                        acc[14],
+                        acc[15],
+                        acc[16],
+                        acc[17],
+                        acc[18],
+                        acc[19],
+                        (tax >> 24) & 0xFF,
+                        (tax >> 16) & 0xFF,
+                        (tax >> 8) & 0xFF,
+                        tax & 0xFF,
+                        (ts >> 24) & 0xFF,
+                        (ts >> 16) & 0xFF,
+                        (ts >> 8) & 0xFF,
+                        ts & 0xFF
+                    ], 'binary').toString('hex').toUpperCase()
+                    return id;
+
+                };
+
+                
+
+                const fee = (tx_blob) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        let req = {command: 'fee'};
+                        if (tx_blob)
+                            req['tx_blob'] = tx_blob;
+
+                        api.request(req).then(resp =>
+                        {
+                            resolve(resp.result.drops);
+                        }).catch(e =>
+                        {
+                            reject(e);
+                        });
+                    });
+                };
+
+                const ledgerAccept = (n) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        const la = (remaining) =>
+                        {
+                            let req = {command: 'ledger_accept'};
+                            api.request(req).then(resp =>
+                            {
+                                if (remaining <= 0)
+                                    resolve(resp);
+                                la(remaining - 1);
+                            }).catch(e=>reject(e));
+                        };
+
+                        la(typeof(n) == 'undefined' ? 1 : n);
+                    });
+                };
+
+                const assertTxnSuccess = x =>
+                {
+                    if (!x || !x.result || x.result.engine_result_code != 0)
+                    {
+                        console.log("Transaction failed:", x)
+                        process.exit(1);
+                    }
+                };
+
+                const assert = (x, m) =>
+                {
+                    if (!(x))
+                    {
+                        console.log("Assertion failed: ", m);
+                        console.log(new Error().stack);
+                        process.exit(1);
+                    }
+                };
+
+                const fetchMeta = (hash) =>
+                {
+                    if (typeof(hash) != 'string')
+                        hash = hash.result.tx_json.hash
+
+                    return new Promise((resolve, reject) =>
+                    {
+                        api.request(
+                        {
+                            command:"tx",
+                            transaction: hash
+                        }).then(e=>{
+                            resolve(e.result.meta)
+                        }).catch(e=>reject(e));
+                    });
+                };
+
+
+                const fetchMetaHookExecutions = (hash, hookhash) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        fetchMeta(hash).then(m=>
+                        {
+                            if (typeof(m) == 'undefined' ||
+                                typeof(m.HookExecutions) == 'undefined' ||
+                                typeof(m.HookExecutions.length) == 'undefined')
+                                {
+                                    return resolve([])
+                                }
+
+                            let ret = [];
+
+                            for (let i = 0; i < m.HookExecutions.length; ++i)
+                            {
+                                if (typeof(hookhash) == 'undefined' ||
+                                    m.HookExecutions[i].HookExecution.HookHash == hookhash)
+                                m.HookExecutions[i].HookExecution.HookReturnCode =
+                                    parseInt(m.HookExecutions[i].HookExecution.HookReturnCode, 16);
+                                m.HookExecutions[i].HookExecution.HookInstructionCount =
+                                    parseInt(m.HookExecutions[i].HookExecution.HookInstructionCount, 16);
+
+                                let s = m.HookExecutions[i].HookExecution.HookReturnString;
+                                if (s != '')
+                                    m.HookExecutions[i].HookExecution.HookReturnString =
+                                        Buffer.from(s, 'hex').toString('utf-8')
+
+                                ret.push(m.HookExecutions[i].HookExecution);
+                            }
+
+                            resolve(ret);
+                        }).catch(e=>reject(e));
+                    });
+                };
+
+
+
+                const assertTxnFailure = x =>
+                {
+                    if (!x || !x.result || x.result.engine_result_code == 0)
+                    {
+                        console.log("Transaction failed:", x)
+                        process.exit(1);
+                    }
+                };
+
+
+                const wasm = (x) =>
+                {
+                    console.log('wasm(' + x + ')');
+                    try 
+                    {
+                        return fs.readFileSync(x).toString('hex').toUpperCase();
+                    }
+                    catch (e) {}
+
+                    try 
+                    {
+                        return fs.readFileSync('wasm/' + x).toString('hex').toUpperCase();
+                    }
+                    catch (e) {}
+
+                    console.log("Could not find " + x)
+                    process.exit(1);
+                };
+
+
+                const wasmHash = (x)=>
+                {
+                    const blob = wasm(x);
+                    return crypto.createHash('SHA512').
+                        update(Buffer.from(blob, 'hex')).
+                        digest().slice(0,32).toString('hex').toUpperCase();
+                }
+
+                const feeCompute = (account_seed, txn_org) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        txn_to_send = { ... txn_org };
+                        txn_to_send['SigningPubKey'] = '';
+
+                        let wal = xrpljs.Wallet.fromSeed(account_seed);
+                        api.prepareTransaction(txn_to_send, {wallet: wal}).then(txn =>
+                        {
+                            let ser = rbc.encode(txn);
+                            fee(ser).then(fees =>
+                            {
+                                let base_drops = fees.base_fee
+
+                                delete txn_to_send['SigningPubKey']
+                                txn_to_send['Fee'] = base_drops + '';
+
+                                api.request(
+                                {
+                                    command: "account_info",
+                                    account: txn.Account
+                                }).then(y=>
+                                {
+                                    let seq = (y.result.account_data.Sequence);
+                                    txn_to_send.Sequence = seq;
+                                    api.prepareTransaction(txn_to_send, {wallet: wal}).then(txn =>
+                                    {
+                                        resolve(txn);
+                                    }).catch(e=>{reject(e);});
+                                }).catch(e=>{reject(e);});
+                            }).catch(e=>{reject(e);});
+                        }).catch(e=>{reject(e);});
+                    });
+                }
+
+                const feeSubmitAccept = (seed, txn) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        feeSubmit(seed, txn).then(x=>
+                        {
+                            ledgerAccept().then(()=>
+                            {
+                                resolve(x);
+                            }).catch(e=>
+                            {
+                                reject(e);
+                            });
+                        }).catch(e =>
+                        {
+                            reject(e);
+                        });
+                    });
+                }
+
+
+                const feeSubmit = (seed, txn) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        feeCompute(seed, txn).then(txn=>
+                        {
+                            api.submit(txn,
+                                {wallet: xrpljs.Wallet.fromSeed(seed)}).then(s=>
+                            {
+                                resolve(s);
+                            }).catch(e=>{reject(e);});
+                        }).catch(e=>{reject(e);});
+                    });
+                }
+
+                const genesisseed = 'snoPBrXtMeMyMHUVTgbuqAfg1SUTb';
+                const genesisaddr = 'rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh';
+
+
+                const genesis =  xrpljs.Wallet.fromSeed(genesisseed);
+
+                const randomAccount = ()=>
+                {
+                    const acc = xrpljs.Wallet.fromSeed(kp.generateSeed());
+                    console.log(acc)
+                    return acc
+                };
+
+                const pay_mock = (seed, amt, dest) =>
+                {
+                    if (dest.classicAddress != undefined)
+                        dest = dest.classicAddress;
+
+                    return new Promise((resolve, reject) =>
+                    {
+
+                        let wal = xrpljs.Wallet.fromSeed(seed);
+                        api.prepareTransaction({
+                            Account: wal.classicAddress,
+                            TransactionType: "Payment",
+                            Amount: ''+amt,
+                            Destination: dest,
+                            SigningPubKey: ''
+                        }, {wallet: wal}).then(txn =>
+                        {
+                            resolve(rbc.encode(txn));
+                        }).catch(e=>
+                        {
+                            reject(e);
+                        });
+                    });
+
+                }
+
+                const pay = (seed, amt, dest) =>
+                {
+                    if (dest.classicAddress != undefined)
+                        dest = dest.classicAddress;
+
+                    return new Promise((resolve, reject) =>
+                    {
+                        let wal = xrpljs.Wallet.fromSeed(seed);
+
+                        feeSubmit(seed, {
+                            Account: wal.classicAddress,
+                            TransactionType: "Payment",
+                            Amount: ''+amt,
+                            Destination: dest
+                        }).then(x=>
+                        {
+                            assertTxnSuccess(x);
+                            resolve(x);
+                        }).catch(err);
+                    });
+                };
+
+                const hookHash = fn =>
+                {
+                    let b = fs.readFileSync('wasm/' + fn);
+                    return crypto.createHash('SHA512').update(b).digest().slice(0,32).toString('hex').toUpperCase()
+                }
+
+                const fundFromGenesis = (acc) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        const ffg = (acc, after) =>
+                        {
+                            if (typeof(acc) != 'string')
+                                acc = acc.classicAddress;
+
+                            console.log('ffg: ' + acc);
+                            feeSubmitAccept(genesis.seed, {
+                                Account: genesis.classicAddress,        // fund account from genesis
+                                TransactionType: "Payment",
+                                Amount: "1000000000",
+                                Destination: acc,
+                            }).then(x=>
+                            {
+                                assertTxnSuccess(x);
+                                if (after)
+                                    return after();
+                                else
+                                    resolve();
+                            }).catch(err);
+                        };
+
+                        const doFfg = (acc) =>
+                        {
+
+                            if (typeof(acc.length) == 'undefined')
+                                return ffg(acc);
+                            else if (acc.length == 1)
+                                return ffg(acc[0]);
+                            else
+                            {
+                                return ffg(acc[0],
+                                    ((acc)=>{
+                                        return ()=>{
+                                            acc.shift();
+                                            return doFfg(acc);
+                                        };
+                                    })(acc));
+                            }
+                        }
+
+                        return doFfg(acc);
+
+                    });
+                };
+
+
+
+                const trustSet = (issuer, currency, limit, holders) =>
+                {
+                    if (typeof(issuer.classicAddress) != 'undefined')
+                        issuer = issuer.classicAddress;
+
+                    return new Promise((resolve, reject)=>
+                    {
+                        const doTs = (holder) =>
+                        {
+                            if (holder.length == 0)
+                                return resolve();
+                            let h = holder.shift();
+                            feeSubmitAccept(h.seed,
+                            {
+                                Account: h.classicAddress,
+                                TransactionType: "TrustSet",
+                                LimitAmount: {
+                                    "currency": currency + "",
+                                    "issuer": issuer,
+                                    "value": limit + ""
+                                }
+                            }).then(x=>
+                            {
+                                console.log(x)
+                                assertTxnSuccess(x);
+                                return doTs(holder);
+                            }).catch(e=>reject(e));
+                        };
+
+                        doTs(holders);
+                    });
+                };
+
+                const issueTokens = (issuer, currency, toWhom) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        const itf = (issuer, currency, toWhom) =>
+                        {
+                            let c = 0;
+                            for (let next in toWhom)
+                            {
+                                c++;
+
+                                let addr = next;
+                                let amt = toWhom[addr];
+                                delete toWhom[addr];
+                                let txn =
+                                {
+                                    Account: issuer.classicAddress,
+                                    TransactionType: "Payment",
+                                    Amount: {
+                                        "currency": currency,
+                                        "value": amt + "",
+                                        "issuer": issuer.classicAddress
+                                    },
+                                    Destination: addr
+                                };
+
+                                feeSubmitAccept(issuer.seed, txn).then(x=>
+                                {
+                                    console.log(x);
+                                    assertTxnSuccess(x);
+                                    return itf(issuer, currency, toWhom);
+                                }).catch(e=>reject(e));
+                                break;
+                            }
+                            if (c == 0)
+                                resolve();
+                        };
+                        return itf(issuer, currency, toWhom);
+                    });
+                };
+
+                const setTshCollect = (accounts) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        const stc = (accounts) =>
+                        {
+                            if (accounts.length == 0)
+                                return resolve();
+                            let acc = accounts.shift();
+
+                            feeSubmitAccept(acc.seed,
+                            {
+                                Account: acc.classicAddress,
+                                TransactionType: "AccountSet",
+                                SetFlag: 11
+                            }).then(x=>
+                            {
+                                console.log(x);
+                                assertTxnSuccess(x);
+                                return stc(accounts);
+                            }).catch(e=>reject(e));
+                        };
+                        stc(accounts);
+                    });
+                }
+
+                const feeSubmitAcceptMultiple = (txn, accounts) =>
+                {
+                    return new Promise((resolve, reject) =>
+                    {
+                        const stc = (accounts) =>
+                        {
+                            if (accounts.length == 0)
+                                return resolve();
+                            let acc = accounts.shift();
+
+                            let txn_to_submit = { ... txn };
+
+                            txn_to_submit['Account'] = acc.classicAddress;
+                            feeSubmitAccept(acc.seed, txn_to_submit).then(x=>
+                            {
+                                console.log(x);
+                                assertTxnSuccess(x);
+                                return stc(accounts);
+                            }).catch(e=>reject(e));
+                        };
+                        stc(accounts);
+                    });
+                }
+
+                const log = m =>
+                {
+//                    console.log(JSON.stringify(m, null, 4));
+                      console.dir(m, {depth:null});
+                }
+
+                api.connect().then(()=>
+                {
+                    resolve({
+                        rbc: rbc,
+                        api: api,
+                        xrpljs: xrpljs,
+                        assertTxnSuccess: assertTxnSuccess,
+                        assertTxnFailure: assertTxnFailure,
+                        wasm: wasm,
+                        kp: kp,
+                        genesis: genesis,
+                        randomAccount: randomAccount,
+                        fundFromGenesis: fundFromGenesis,
+                        err: err,
+                        hsfOVERRIDE: 1,
+                        hsfNSDELETE: 2,
+                        hsfCOLLECT: 4,
+                        asfTshCollect: 11,
+                        hookHash: hookHash,
+                        pay: pay,
+                        pay_mock: pay_mock,
+                        fee: fee,
+                        genesisseed: genesisseed,
+                        genesisaddr: genesisaddr,
+                        feeCompute: feeCompute,
+                        feeSubmit: feeSubmit,
+                        feeSubmitAccept: feeSubmitAccept,
+                        ledgerAccept: ledgerAccept,
+                        fetchMeta: fetchMeta,
+                        fetchMetaHookExecutions: fetchMetaHookExecutions,
+                        wasmHash: wasmHash,
+                        assert: assert,
+                        trustSet: trustSet,
+                        issueTokens: issueTokens,
+                        log: log,
+                        setTshCollect: setTshCollect,
+                        feeSubmitAcceptMultiple: feeSubmitAcceptMultiple,
+                        nftid: nftid
+
+                    });
+                }).catch(err);
+        });
+    }
+};