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10 Commits

Author SHA1 Message Date
Oliver Eggert
601e79ed00 add send fungible token escrows tutorial 2026-04-03 16:51:50 -07:00
Oliver Eggert
e05aa8259b fix comments for code-snippet references 2026-04-03 16:03:05 -07:00
Oliver Eggert
b7be1f878e remove numbered steps from code comments 2026-04-03 13:31:12 -07:00
Oliver Eggert
ac60d7786b add go code sample and readme 2026-04-03 12:47:06 -07:00
Oliver Eggert
394eb4b5d4 add intro comment to code sample files 2026-04-03 12:45:18 -07:00
Oliver Eggert
cd4bb02ae2 update js and py readmes to explain what script does 2026-04-03 12:44:28 -07:00
Oliver Eggert
a309eb51c5 add send_fungible_token_escrow.py and update readme.md 2026-04-03 00:06:17 -07:00
Oliver Eggert
578e8cdefc clean up variable names 2026-04-02 22:48:35 -07:00
Oliver Eggert
c5b161c746 update cancelafter and finishafter to use same now() time 2026-04-02 22:23:40 -07:00
Oliver Eggert
f493ca49cf add token escrow js code sample 2026-04-02 21:15:10 -07:00
9 changed files with 1977 additions and 0 deletions

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# Escrow (Go)
This directory contains Go examples demonstrating how to create, finish, and cancel escrows on the XRP Ledger.
## Setup
All commands should be run from this `go/` directory.
Install dependencies before running any examples:
```sh
go mod tidy
```
---
## Send Fungible Token Escrow
```sh
go run ./send-fungible-token-escrow
```
The script issues an MPT and Trust Line Token, setting up both to be escrowable. It then creates and finishes a conditional escrow with the MPT and a timed escrow with the Trust Line Token.
```sh
=== Funding Accounts ===
Funding Issuer account...
Funding Escrow Creator account...
Issuer: rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD
Escrow Creator: rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk
=== Creating MPT ===
{
"Account": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"Flags": 8,
"MaximumAmount": "1000000",
"TransactionType": "MPTokenIssuanceCreate"
}
Submitting MPTokenIssuanceCreate transaction...
MPT created: 00F7A9BD191FD9BB1D11E217CA5643AED429859BDD40EF8B
=== Escrow Creator Authorizing MPT ===
{
"Account": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"MPTokenIssuanceID": "00F7A9BD191FD9BB1D11E217CA5643AED429859BDD40EF8B",
"TransactionType": "MPTokenAuthorize"
}
Submitting MPTokenAuthorize transaction...
Escrow Creator authorized for MPT.
=== Issuer Sending MPTs to Escrow Creator ===
{
"Account": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"Amount": {
"mpt_issuance_id": "00F7A9BD191FD9BB1D11E217CA5643AED429859BDD40EF8B",
"value": "5000"
},
"Destination": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"TransactionType": "Payment"
}
Submitting MPT Payment transaction...
Successfully sent 5000 MPTs to Escrow Creator.
=== Creating Conditional MPT Escrow ===
Condition: A025802057FDC219A423C4F0DA150941EB529B1D927816FAB394617A0430D1DDB39A3EDB810120
Fulfillment: A0228020F16E8A8697ABAE14C60A5D812A2D228F9E6F67B8CA4818DC80BBF539004490DB
{
"Account": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"Amount": {
"mpt_issuance_id": "00F7A9BD191FD9BB1D11E217CA5643AED429859BDD40EF8B",
"value": "1000"
},
"CancelAfter": 828559916,
"Condition": "A025802057FDC219A423C4F0DA150941EB529B1D927816FAB394617A0430D1DDB39A3EDB810120",
"Destination": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"TransactionType": "EscrowCreate"
}
Submitting MPT EscrowCreate transaction...
Conditional MPT escrow created. Sequence: 16230848
=== Finishing Conditional MPT Escrow ===
{
"Account": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"Condition": "A025802057FDC219A423C4F0DA150941EB529B1D927816FAB394617A0430D1DDB39A3EDB810120",
"Fulfillment": "A0228020F16E8A8697ABAE14C60A5D812A2D228F9E6F67B8CA4818DC80BBF539004490DB",
"OfferSequence": 16230848,
"Owner": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"TransactionType": "EscrowFinish"
}
Submitting EscrowFinish transaction...
Conditional MPT escrow finished successfully: https://testnet.xrpl.org/transactions/37CD7FECDC71CE70C24927969AD0FDAD55F57F2905A6F62867CB4F5AB2EE27BB
=== Enabling Trust Line Token Escrows on Issuer ===
{
"Account": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"SetFlag": 17,
"TransactionType": "AccountSet"
}
Submitting AccountSet transaction...
Trust line token escrows enabled by issuer.
=== Setting Up Trust Line ===
{
"Account": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"LimitAmount": {
"currency": "IOU",
"issuer": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"value": "10000000"
},
"TransactionType": "TrustSet"
}
Submitting TrustSet transaction...
Trust line successfully created for "IOU" tokens.
=== Issuer Sending IOU Tokens to Escrow Creator ===
{
"Account": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"Amount": {
"currency": "IOU",
"issuer": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"value": "5000"
},
"Destination": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"TransactionType": "Payment"
}
Submitting Trust Line Token payment transaction...
Successfully sent 5000 IOU tokens.
=== Creating Timed Trust Line Token Escrow ===
Escrow will mature after: 04/03/2026, 12:27:38 PM
{
"Account": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"Amount": {
"currency": "IOU",
"issuer": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"value": "1000"
},
"CancelAfter": 828559948,
"Destination": "rsHiso1Qb4vb9GfuWSvmPeBuk6BT1479uD",
"FinishAfter": 828559658,
"TransactionType": "EscrowCreate"
}
Submitting Trust Line Token EscrowCreate transaction...
Trust Line Token escrow created. Sequence: 16230851
=== Waiting For Timed Trust Line Token Escrow to Mature ===
Waiting for escrow to mature... done.
Latest validated ledger closed at: 04/03/2026, 12:27:41 PM
Escrow confirmed ready to finish.
=== Finishing Timed Trust Line Token Escrow ===
{
"Account": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"OfferSequence": 16230851,
"Owner": "rfQVjJ9sRYcLqwxRV2rqSSFm9jusXXo9Sk",
"TransactionType": "EscrowFinish"
}
Submitting EscrowFinish transaction...
Timed Trust Line Token escrow finished successfully: https://testnet.xrpl.org/transactions/9D1937BE3ADFC42078F222B1DBAE8571BBC096DDA7A47911C4715221C83EC22D
```

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module github.com/XRPLF
go 1.24.3
require (
github.com/Peersyst/xrpl-go v0.1.17
github.com/go-interledger/cryptoconditions v0.0.0-20180612102545-aba58e59cef1
)
require (
github.com/PromonLogicalis/asn1 v0.0.0-20190312173541-d60463189a56 // indirect
github.com/bsv-blockchain/go-sdk v1.2.9 // indirect
github.com/decred/dcrd/crypto/ripemd160 v1.0.2 // indirect
github.com/decred/dcrd/dcrec/secp256k1/v4 v4.4.1 // indirect
github.com/gorilla/websocket v1.5.0 // indirect
github.com/kalaspuffar/base64url v0.0.0-20171121144659-483af17b794c // indirect
github.com/magiconair/properties v1.8.10 // indirect
github.com/mitchellh/mapstructure v1.5.0 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/stevenroose/asn1 v0.0.0-20170613173945-a0d410e3f79f // indirect
github.com/ugorji/go/codec v1.2.11 // indirect
golang.org/x/crypto v0.44.0 // indirect
)

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// This example demonstrates how to create escrows that hold fungible tokens.
// It covers MPTs and Trust Line Tokens, and uses conditional and timed escrows.
package main
import (
"crypto/rand"
"encoding/hex"
"encoding/json"
"fmt"
"os"
"strings"
"time"
"github.com/Peersyst/xrpl-go/pkg/crypto"
"github.com/Peersyst/xrpl-go/xrpl/faucet"
"github.com/Peersyst/xrpl-go/xrpl/queries/account"
"github.com/Peersyst/xrpl-go/xrpl/queries/common"
ledgerreq "github.com/Peersyst/xrpl-go/xrpl/queries/ledger"
xrpltime "github.com/Peersyst/xrpl-go/xrpl/time"
"github.com/Peersyst/xrpl-go/xrpl/transaction"
"github.com/Peersyst/xrpl-go/xrpl/transaction/types"
"github.com/Peersyst/xrpl-go/xrpl/wallet"
"github.com/Peersyst/xrpl-go/xrpl/websocket"
wstypes "github.com/Peersyst/xrpl-go/xrpl/websocket/types"
"github.com/go-interledger/cryptoconditions"
)
func main() {
client := websocket.NewClient(
websocket.NewClientConfig().
WithHost("wss://s.altnet.rippletest.net:51233").
WithFaucetProvider(faucet.NewTestnetFaucetProvider()),
)
defer client.Disconnect()
if err := client.Connect(); err != nil {
panic(err)
}
// Fund an issuer account and an escrow creator account ----------------------
fmt.Printf("\n=== Funding Accounts ===\n\n")
createAndFund := func(label string) wallet.Wallet {
fmt.Printf("Funding %s account...\n", label)
w, err := wallet.New(crypto.ED25519())
if err != nil {
panic(err)
}
if err := client.FundWallet(&w); err != nil {
panic(err)
}
// Poll until account is validated on ledger
funded := false
for range 20 {
_, err := client.Request(&account.InfoRequest{
Account: w.GetAddress(),
LedgerIndex: common.Validated,
})
if err == nil {
funded = true
break
}
time.Sleep(time.Second)
}
if !funded {
panic("Issue funding account: " + w.GetAddress().String())
}
return w
}
issuer := createAndFund("Issuer")
creator := createAndFund("Escrow Creator")
fmt.Printf("Issuer: %s\n", issuer.ClassicAddress)
fmt.Printf("Escrow Creator: %s\n", creator.ClassicAddress)
// ====== Conditional MPT Escrow ======
// Issuer creates an MPT ----------------------
fmt.Printf("\n=== Creating MPT ===\n\n")
maxAmount := types.XRPCurrencyAmount(1000000)
mptCreateTx := transaction.MPTokenIssuanceCreate{
BaseTx: transaction.BaseTx{
Account: issuer.ClassicAddress,
Flags: transaction.TfMPTCanEscrow,
},
MaximumAmount: &maxAmount,
}
// Flatten() converts the struct to a map and adds the TransactionType field
flatMptCreateTx := mptCreateTx.Flatten()
mptCreateTxJSON, _ := json.MarshalIndent(flatMptCreateTx, "", " ")
fmt.Printf("%s\n", string(mptCreateTxJSON))
// Submit, sign, and wait for validation
fmt.Printf("\nSubmitting MPTokenIssuanceCreate transaction...\n")
mptCreateResponse, err := client.SubmitTxAndWait(flatMptCreateTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &issuer,
})
if err != nil {
panic(err)
}
if mptCreateResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("MPTokenIssuanceCreate failed: %s\n", mptCreateResponse.Meta.TransactionResult)
os.Exit(1)
}
// Extract the MPT issuance ID from the transaction result
mptIssuanceID := string(*mptCreateResponse.Meta.MPTIssuanceID)
fmt.Printf("MPT created: %s\n", mptIssuanceID)
// Escrow Creator authorizes the MPT ----------------------
fmt.Printf("\n=== Escrow Creator Authorizing MPT ===\n\n")
mptAuthTx := transaction.MPTokenAuthorize{
BaseTx: transaction.BaseTx{
Account: creator.ClassicAddress,
},
MPTokenIssuanceID: mptIssuanceID,
}
flatMptAuthTx := mptAuthTx.Flatten()
mptAuthTxJSON, _ := json.MarshalIndent(flatMptAuthTx, "", " ")
fmt.Printf("%s\n", string(mptAuthTxJSON))
fmt.Printf("\nSubmitting MPTokenAuthorize transaction...\n")
mptAuthResponse, err := client.SubmitTxAndWait(flatMptAuthTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &creator,
})
if err != nil {
panic(err)
}
if mptAuthResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("MPTokenAuthorize failed: %s\n", mptAuthResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Escrow Creator authorized for MPT.\n")
// Issuer sends MPTs to escrow creator ----------------------
fmt.Printf("\n=== Issuer Sending MPTs to Escrow Creator ===\n\n")
mptPaymentTx := transaction.Payment{
BaseTx: transaction.BaseTx{
Account: issuer.ClassicAddress,
},
Destination: creator.ClassicAddress,
Amount: types.MPTCurrencyAmount{
MPTIssuanceID: mptIssuanceID,
Value: "5000",
},
}
flatMptPaymentTx := mptPaymentTx.Flatten()
mptPaymentTxJSON, _ := json.MarshalIndent(flatMptPaymentTx, "", " ")
fmt.Printf("%s\n", string(mptPaymentTxJSON))
fmt.Printf("\nSubmitting MPT Payment transaction...\n")
mptPaymentResponse, err := client.SubmitTxAndWait(flatMptPaymentTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &issuer,
})
if err != nil {
panic(err)
}
if mptPaymentResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("MPT Payment failed: %s\n", mptPaymentResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Successfully sent 5000 MPTs to Escrow Creator.\n")
// Escrow Creator creates a conditional MPT escrow ----------------------
fmt.Printf("\n=== Creating Conditional MPT Escrow ===\n\n")
// Generate crypto-condition
preimage := make([]byte, 32)
if _, err := rand.Read(preimage); err != nil {
panic(err)
}
fulfillment := cryptoconditions.NewPreimageSha256(preimage)
fulfillmentBinary, err := fulfillment.Encode()
if err != nil {
panic(err)
}
conditionBinary, err := fulfillment.Condition().Encode()
if err != nil {
panic(err)
}
fulfillmentHex := strings.ToUpper(hex.EncodeToString(fulfillmentBinary))
conditionHex := strings.ToUpper(hex.EncodeToString(conditionBinary))
fmt.Printf("Condition: %s\n", conditionHex)
fmt.Printf("Fulfillment: %s\n\n", fulfillmentHex)
// Set expiration (300 seconds from now)
cancelAfterRippleTime := xrpltime.UnixTimeToRippleTime(time.Now().Unix()) + 300
mptEscrowCreateTx := transaction.EscrowCreate{
BaseTx: transaction.BaseTx{
Account: creator.ClassicAddress,
},
Destination: issuer.ClassicAddress,
Amount: types.MPTCurrencyAmount{
MPTIssuanceID: mptIssuanceID,
Value: "1000",
},
Condition: conditionHex,
CancelAfter: uint32(cancelAfterRippleTime), // Fungible token escrows require a CancelAfter time
}
flatMptEscrowCreateTx := mptEscrowCreateTx.Flatten()
mptEscrowCreateTxJSON, _ := json.MarshalIndent(flatMptEscrowCreateTx, "", " ")
fmt.Printf("%s\n", string(mptEscrowCreateTxJSON))
fmt.Printf("\nSubmitting MPT EscrowCreate transaction...\n")
mptEscrowResponse, err := client.SubmitTxAndWait(flatMptEscrowCreateTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &creator,
})
if err != nil {
panic(err)
}
if mptEscrowResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("MPT EscrowCreate failed: %s\n", mptEscrowResponse.Meta.TransactionResult)
os.Exit(1)
}
// Save the sequence number to identify the escrow later
mptEscrowSeq := mptEscrowResponse.TxJSON.Sequence()
fmt.Printf("Conditional MPT escrow created. Sequence: %d\n", mptEscrowSeq)
// Finish the conditional MPT escrow with the fulfillment ----------------------
fmt.Printf("\n=== Finishing Conditional MPT Escrow ===\n\n")
mptEscrowFinishTx := transaction.EscrowFinish{
BaseTx: transaction.BaseTx{
Account: creator.ClassicAddress,
},
Owner: creator.ClassicAddress,
OfferSequence: mptEscrowSeq,
Condition: conditionHex,
Fulfillment: fulfillmentHex,
}
flatMptEscrowFinishTx := mptEscrowFinishTx.Flatten()
mptEscrowFinishTxJSON, _ := json.MarshalIndent(flatMptEscrowFinishTx, "", " ")
fmt.Printf("%s\n", string(mptEscrowFinishTxJSON))
fmt.Printf("\nSubmitting EscrowFinish transaction...\n")
mptFinishResponse, err := client.SubmitTxAndWait(flatMptEscrowFinishTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &creator,
})
if err != nil {
panic(err)
}
if mptFinishResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("MPT EscrowFinish failed: %s\n", mptFinishResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Conditional MPT escrow finished successfully: https://testnet.xrpl.org/transactions/%s\n", mptFinishResponse.Hash)
// ====== Timed Trust Line Token Escrow ======
// Enable trust line token escrows on the issuer ----------------------
fmt.Printf("\n=== Enabling Trust Line Token Escrows on Issuer ===\n\n")
accountSetTx := transaction.AccountSet{
BaseTx: transaction.BaseTx{
Account: issuer.ClassicAddress,
},
SetFlag: transaction.AsfAllowTrustLineLocking,
}
flatAccountSetTx := accountSetTx.Flatten()
accountSetTxJSON, _ := json.MarshalIndent(flatAccountSetTx, "", " ")
fmt.Printf("%s\n", string(accountSetTxJSON))
fmt.Printf("\nSubmitting AccountSet transaction...\n")
accountSetResponse, err := client.SubmitTxAndWait(flatAccountSetTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &issuer,
})
if err != nil {
panic(err)
}
if accountSetResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("AccountSet failed: %s\n", accountSetResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Trust line token escrows enabled by issuer.\n")
// Escrow Creator sets up a trust line to the issuer ----------------------
fmt.Printf("\n=== Setting Up Trust Line ===\n\n")
currencyCode := "IOU"
trustSetTx := transaction.TrustSet{
BaseTx: transaction.BaseTx{
Account: creator.ClassicAddress,
},
LimitAmount: types.IssuedCurrencyAmount{
Currency: currencyCode,
Issuer: issuer.ClassicAddress,
Value: "10000000",
},
}
flatTrustSetTx := trustSetTx.Flatten()
trustSetTxJSON, _ := json.MarshalIndent(flatTrustSetTx, "", " ")
fmt.Printf("%s\n", string(trustSetTxJSON))
fmt.Printf("\nSubmitting TrustSet transaction...\n")
trustResponse, err := client.SubmitTxAndWait(flatTrustSetTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &creator,
})
if err != nil {
panic(err)
}
if trustResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("TrustSet failed: %s\n", trustResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Trust line successfully created for \"IOU\" tokens.\n")
// Issuer sends IOU tokens to creator ----------------------
fmt.Printf("\n=== Issuer Sending IOU Tokens to Escrow Creator ===\n\n")
iouPaymentTx := transaction.Payment{
BaseTx: transaction.BaseTx{
Account: issuer.ClassicAddress,
},
Destination: creator.ClassicAddress,
Amount: types.IssuedCurrencyAmount{
Currency: currencyCode,
Value: "5000",
Issuer: issuer.ClassicAddress,
},
}
flatIouPaymentTx := iouPaymentTx.Flatten()
iouPaymentTxJSON, _ := json.MarshalIndent(flatIouPaymentTx, "", " ")
fmt.Printf("%s\n", string(iouPaymentTxJSON))
fmt.Printf("\nSubmitting Trust Line Token payment transaction...\n")
iouPayResponse, err := client.SubmitTxAndWait(flatIouPaymentTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &issuer,
})
if err != nil {
panic(err)
}
if iouPayResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("Trust Line Token payment failed: %s\n", iouPayResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Successfully sent 5000 %s tokens.\n", currencyCode)
// Escrow Creator creates a timed trust line token escrow ----------------------
fmt.Printf("\n=== Creating Timed Trust Line Token Escrow ===\n\n")
delay := 10 // seconds
now := time.Now()
finishAfterRippleTime := xrpltime.UnixTimeToRippleTime(now.Unix()) + int64(delay)
matureTime := now.Add(time.Duration(delay) * time.Second).Format("01/02/2006, 03:04:05 PM")
fmt.Printf("Escrow will mature after: %s\n\n", matureTime)
iouCancelAfterRippleTime := xrpltime.UnixTimeToRippleTime(now.Unix()) + 300
iouEscrowCreateTx := transaction.EscrowCreate{
BaseTx: transaction.BaseTx{
Account: creator.ClassicAddress,
},
Destination: issuer.ClassicAddress,
Amount: types.IssuedCurrencyAmount{
Currency: currencyCode,
Value: "1000",
Issuer: issuer.ClassicAddress,
},
FinishAfter: uint32(finishAfterRippleTime),
CancelAfter: uint32(iouCancelAfterRippleTime),
}
flatIouEscrowCreateTx := iouEscrowCreateTx.Flatten()
iouEscrowCreateTxJSON, _ := json.MarshalIndent(flatIouEscrowCreateTx, "", " ")
fmt.Printf("%s\n", string(iouEscrowCreateTxJSON))
fmt.Printf("\nSubmitting Trust Line Token EscrowCreate transaction...\n")
iouEscrowResponse, err := client.SubmitTxAndWait(flatIouEscrowCreateTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &creator,
})
if err != nil {
panic(err)
}
if iouEscrowResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("Trust Line Token EscrowCreate failed: %s\n", iouEscrowResponse.Meta.TransactionResult)
os.Exit(1)
}
// Save the sequence number to identify the escrow later
iouEscrowSeq := iouEscrowResponse.TxJSON.Sequence()
fmt.Printf("Trust Line Token escrow created. Sequence: %d\n", iouEscrowSeq)
// Wait for the escrow to mature, then finish it --------------------
fmt.Printf("\n=== Waiting For Timed Trust Line Token Escrow to Mature ===\n\n")
// Countdown delay until escrow matures
for i := delay; i >= 0; i-- {
fmt.Printf("Waiting for escrow to mature... %ds remaining...\r", i)
time.Sleep(time.Second)
}
fmt.Printf("Waiting for escrow to mature... done. \n")
// Confirm latest validated ledger close time is after the FinishAfter time
escrowReady := false
for !escrowReady {
ledgerResp, err := client.GetLedger(&ledgerreq.Request{
LedgerIndex: common.Validated,
})
if err != nil {
panic(err)
}
ledgerCloseTime := int64(ledgerResp.Ledger.CloseTime)
ledgerCloseLocal := time.Unix(xrpltime.RippleTimeToUnixTime(ledgerCloseTime)/1000, 0).Format("01/02/2006, 03:04:05 PM")
fmt.Printf("Latest validated ledger closed at: %s\n", ledgerCloseLocal)
if ledgerCloseTime > finishAfterRippleTime {
escrowReady = true
fmt.Printf("Escrow confirmed ready to finish.\n")
} else {
timeDifference := finishAfterRippleTime - ledgerCloseTime
if timeDifference == 0 {
timeDifference = 1
}
fmt.Printf("Escrow needs to wait another %ds.\n", timeDifference)
time.Sleep(time.Duration(timeDifference) * time.Second)
}
}
// Finish the timed trust line token escrow --------------------
fmt.Printf("\n=== Finishing Timed Trust Line Token Escrow ===\n\n")
iouEscrowFinishTx := transaction.EscrowFinish{
BaseTx: transaction.BaseTx{
Account: creator.ClassicAddress,
},
Owner: creator.ClassicAddress,
OfferSequence: iouEscrowSeq,
}
flatIouEscrowFinishTx := iouEscrowFinishTx.Flatten()
iouEscrowFinishTxJSON, _ := json.MarshalIndent(flatIouEscrowFinishTx, "", " ")
fmt.Printf("%s\n", string(iouEscrowFinishTxJSON))
fmt.Printf("\nSubmitting EscrowFinish transaction...\n")
iouFinishResponse, err := client.SubmitTxAndWait(flatIouEscrowFinishTx, &wstypes.SubmitOptions{
Autofill: true,
Wallet: &creator,
})
if err != nil {
panic(err)
}
if iouFinishResponse.Meta.TransactionResult != "tesSUCCESS" {
fmt.Printf("Trust Line Token EscrowFinish failed: %s\n", iouFinishResponse.Meta.TransactionResult)
os.Exit(1)
}
fmt.Printf("Timed Trust Line Token escrow finished successfully: https://testnet.xrpl.org/transactions/%s\n", iouFinishResponse.Hash)
}

View File

@@ -20,6 +20,173 @@ node send-timed-escrow.js
node send-conditional-escrow.js
```
## Send Fungible Token Escrow
```sh
node sendFungibleTokenEscrow.js
```
The script issues an MPT and Trust Line Token, setting up both to be escrowable. It then creates and finishes a conditional escrow with the MPT and a timed escrow with the Trust Line Token.
```sh
=== Funding Accounts ===
Issuer: rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP
Escrow Creator: rGRvH4FanVixca934o3ui4MbcrU56x9Qj4
=== Creating MPT ===
{
"TransactionType": "MPTokenIssuanceCreate",
"Account": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"MaximumAmount": "1000000",
"Flags": 8
}
Submitting MPTokenIssuanceCreate transaction...
MPT created: 00F763A2D998FA5E720228B31E1162AC55E6311C7D31F3FC
=== Escrow Creator Authorizing MPT ===
{
"TransactionType": "MPTokenAuthorize",
"Account": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"MPTokenIssuanceID": "00F763A2D998FA5E720228B31E1162AC55E6311C7D31F3FC"
}
Submitting MPTokenAuthorize transaction...
Escrow Creator authorized for MPT.
=== Issuer Sending MPTs to Escrow Creator ===
{
"TransactionType": "Payment",
"Account": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"Destination": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"Amount": {
"mpt_issuance_id": "00F763A2D998FA5E720228B31E1162AC55E6311C7D31F3FC",
"value": "5000"
}
}
Submitting MPT Payment transaction...
Successfully sent 5000 MPTs to Escrow Creator.
=== Creating Conditional MPT Escrow ===
Condition: A0258020AA2B8450898500A9E6332B7AD107264982CB09C63E3D16D139D63E997597E6F6810120
Fulfillment: A0228020CA07971CB0C63ED20C69931B41EEA7C4C8CC6F214183FDE031CDC7413856977F
{
"TransactionType": "EscrowCreate",
"Account": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"Destination": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"Amount": {
"mpt_issuance_id": "00F763A2D998FA5E720228B31E1162AC55E6311C7D31F3FC",
"value": "1000"
},
"Condition": "A0258020AA2B8450898500A9E6332B7AD107264982CB09C63E3D16D139D63E997597E6F6810120",
"CancelAfter": 828504579
}
Submitting MPT EscrowCreate transaction...
Conditional MPT escrow created. Sequence: 16212899
=== Finishing Conditional MPT Escrow ===
{
"TransactionType": "EscrowFinish",
"Account": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"Owner": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"OfferSequence": 16212899,
"Condition": "A0258020AA2B8450898500A9E6332B7AD107264982CB09C63E3D16D139D63E997597E6F6810120",
"Fulfillment": "A0228020CA07971CB0C63ED20C69931B41EEA7C4C8CC6F214183FDE031CDC7413856977F"
}
Submitting EscrowFinish transaction...
Conditional MPT escrow finished successfully: https://testnet.xrpl.org/transactions/BB6E8BF8A7F28D15C12C24FFDB215180262ABFAEAD43FB020DCB39E826027078
=== Enabling Trust Line Token Escrows on Issuer ===
{
"TransactionType": "AccountSet",
"Account": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"SetFlag": 17
}
Submitting AccountSet transaction...
Trust line token escrows enabled by issuer.
=== Setting Up Trust Line ===
{
"TransactionType": "TrustSet",
"Account": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"LimitAmount": {
"currency": "IOU",
"issuer": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"value": "10000000"
}
}
Submitting TrustSet transaction...
Trust line successfully created for "IOU" tokens.
=== Issuer Sending IOU Tokens to Escrow Creator ===
{
"TransactionType": "Payment",
"Account": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"Destination": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"Amount": {
"currency": "IOU",
"value": "5000",
"issuer": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP"
}
}
Submitting Trust Line Token payment transaction...
Successfully sent 5000 IOU tokens.
=== Creating Timed Trust Line Token Escrow ===
Escrow will mature after: 4/2/2026, 9:05:12 PM
{
"TransactionType": "EscrowCreate",
"Account": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"Destination": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP",
"Amount": {
"currency": "IOU",
"value": "1000",
"issuer": "rLqYtjhg56pVNJFKueVVKkiA8z5UtznxQP"
},
"FinishAfter": 828504312,
"CancelAfter": 828504602
}
Submitting Trust Line Token EscrowCreate transaction...
Trust Line Token escrow created. Sequence: 16212902
=== Waiting For Timed Trust Line Token Escrow to Mature ===
Waiting for escrow to mature... done.
Latest validated ledger closed at: 4/2/2026, 9:05:13 PM
Escrow confirmed ready to finish.
=== Finishing Timed Trust Line Token Escrow ===
{
"TransactionType": "EscrowFinish",
"Account": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"Owner": "rGRvH4FanVixca934o3ui4MbcrU56x9Qj4",
"OfferSequence": 16212902
}
Submitting EscrowFinish transaction...
Timed Trust Line Token escrow finished successfully: https://testnet.xrpl.org/transactions/136402974863BF553706B0A4A341F24DDA5385BB6F93B905038D8FD9863B6D91
```
## List Escrows
```sh

View File

@@ -0,0 +1,358 @@
// This example demonstrates how to create escrows that hold fungible tokens.
// It covers MPTs and Trust Line Tokens, and uses conditional and timed escrows.
import xrpl from 'xrpl'
import { PreimageSha256 } from 'five-bells-condition'
import { randomBytes } from 'crypto'
const client = new xrpl.Client('wss://s.altnet.rippletest.net:51233')
await client.connect()
// Fund an issuer account and an escrow creator account ----------------------
console.log(`\n=== Funding Accounts ===\n`)
const [
{ wallet: issuer },
{ wallet: creator }
] = await Promise.all([
client.fundWallet(),
client.fundWallet()
])
console.log(`Issuer: ${issuer.address}`)
console.log(`Escrow Creator: ${creator.address}`)
// ====== Conditional MPT Escrow ======
// Issuer creates an MPT ----------------------
console.log('\n=== Creating MPT ===\n')
const mptCreateTx = {
TransactionType: 'MPTokenIssuanceCreate',
Account: issuer.address,
MaximumAmount: '1000000',
Flags: xrpl.MPTokenIssuanceCreateFlags.tfMPTCanEscrow
}
// Validate the transaction structure before submitting
xrpl.validate(mptCreateTx)
console.log(JSON.stringify(mptCreateTx, null, 2))
// Submit, sign, and wait for validation
console.log(`\nSubmitting MPTokenIssuanceCreate transaction...`)
const mptCreateResponse = await client.submitAndWait(mptCreateTx, {
wallet: issuer,
autofill: true
})
if (mptCreateResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`MPTokenIssuanceCreate failed: ${mptCreateResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
// Extract the MPT issuance ID from the transaction result
const mptIssuanceId = mptCreateResponse.result.meta.mpt_issuance_id
console.log(`MPT created: ${mptIssuanceId}`)
// Escrow Creator authorizes the MPT ----------------------
console.log('\n=== Escrow Creator Authorizing MPT ===\n')
const mptAuthTx = {
TransactionType: 'MPTokenAuthorize',
Account: creator.address,
MPTokenIssuanceID: mptIssuanceId
}
xrpl.validate(mptAuthTx)
console.log(JSON.stringify(mptAuthTx, null, 2))
console.log(`\nSubmitting MPTokenAuthorize transaction...`)
const mptAuthResponse = await client.submitAndWait(mptAuthTx, {
wallet: creator,
autofill: true
})
if (mptAuthResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`MPTokenAuthorize failed: ${mptAuthResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log('Escrow Creator authorized for MPT.')
// Issuer sends MPTs to escrow creator ----------------------
console.log('\n=== Issuer Sending MPTs to Escrow Creator ===\n')
const mptPaymentTx = {
TransactionType: 'Payment',
Account: issuer.address,
Destination: creator.address,
Amount: {
mpt_issuance_id: mptIssuanceId,
value: '5000'
}
}
xrpl.validate(mptPaymentTx)
console.log(JSON.stringify(mptPaymentTx, null, 2))
console.log(`\nSubmitting MPT Payment transaction...`)
const mptPaymentResponse = await client.submitAndWait(mptPaymentTx, {
wallet: issuer,
autofill: true
})
if (mptPaymentResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`MPT Payment failed: ${mptPaymentResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log('Successfully sent 5000 MPTs to Escrow Creator.')
// Escrow Creator creates a conditional MPT escrow ----------------------
console.log('\n=== Creating Conditional MPT Escrow ===\n')
// Generate crypto-condition
const preimage = randomBytes(32)
const fulfillment = new PreimageSha256()
fulfillment.setPreimage(preimage)
const fulfillmentHex = fulfillment.serializeBinary().toString('hex').toUpperCase()
const conditionHex = fulfillment.getConditionBinary().toString('hex').toUpperCase()
console.log(`Condition: ${conditionHex}`)
console.log(`Fulfillment: ${fulfillmentHex}\n`)
// Set expiration (300 seconds from now)
const cancelAfter = new Date()
cancelAfter.setSeconds(cancelAfter.getSeconds() + 300)
const cancelAfterRippleTime = xrpl.isoTimeToRippleTime(cancelAfter.toISOString())
const mptEscrowCreateTx = {
TransactionType: 'EscrowCreate',
Account: creator.address,
Destination: issuer.address,
Amount: {
mpt_issuance_id: mptIssuanceId,
value: '1000'
},
Condition: conditionHex,
CancelAfter: cancelAfterRippleTime // Fungible token escrows require a CancelAfter time
}
xrpl.validate(mptEscrowCreateTx)
console.log(JSON.stringify(mptEscrowCreateTx, null, 2))
console.log(`\nSubmitting MPT EscrowCreate transaction...`)
const mptEscrowResponse = await client.submitAndWait(mptEscrowCreateTx, {
wallet: creator,
autofill: true
})
if (mptEscrowResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`MPT EscrowCreate failed: ${mptEscrowResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
// Save the sequence number to identify the escrow later
const mptEscrowSeq = mptEscrowResponse.result.tx_json.Sequence
console.log(`Conditional MPT escrow created. Sequence: ${mptEscrowSeq}`)
// Finish the conditional MPT escrow with the fulfillment ----------------------
console.log('\n=== Finishing Conditional MPT Escrow ===\n')
const mptEscrowFinishTx = {
TransactionType: 'EscrowFinish',
Account: creator.address,
Owner: creator.address,
OfferSequence: mptEscrowSeq,
Condition: conditionHex,
Fulfillment: fulfillmentHex
}
xrpl.validate(mptEscrowFinishTx)
console.log(JSON.stringify(mptEscrowFinishTx, null, 2))
console.log(`\nSubmitting EscrowFinish transaction...`)
const mptFinishResponse = await client.submitAndWait(mptEscrowFinishTx, {
wallet: creator,
autofill: true
})
if (mptFinishResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`MPT EscrowFinish failed: ${mptFinishResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log(`Conditional MPT escrow finished successfully: https://testnet.xrpl.org/transactions/${mptFinishResponse.result.hash}`)
// ====== Timed Trust Line Token Escrow ======
// Enable trust line token escrows on the issuer ----------------------
console.log('\n=== Enabling Trust Line Token Escrows on Issuer ===\n')
const accountSetTx = {
TransactionType: 'AccountSet',
Account: issuer.address,
SetFlag: xrpl.AccountSetAsfFlags.asfAllowTrustLineLocking
}
xrpl.validate(accountSetTx)
console.log(JSON.stringify(accountSetTx, null, 2))
console.log(`\nSubmitting AccountSet transaction...`)
const accountSetResponse = await client.submitAndWait(accountSetTx, {
wallet: issuer,
autofill: true
})
if (accountSetResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`AccountSet failed: ${accountSetResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log('Trust line token escrows enabled by issuer.')
// Escrow Creator sets up a trust line to the issuer ----------------------
console.log('\n=== Setting Up Trust Line ===\n')
const currencyCode = 'IOU'
const trustSetTx = {
TransactionType: 'TrustSet',
Account: creator.address,
LimitAmount: {
currency: currencyCode,
issuer: issuer.address,
value: '10000000'
}
}
xrpl.validate(trustSetTx)
console.log(JSON.stringify(trustSetTx, null, 2))
console.log(`\nSubmitting TrustSet transaction...`)
const trustResponse = await client.submitAndWait(trustSetTx, {
wallet: creator,
autofill: true
})
if (trustResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`TrustSet failed: ${trustResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log('Trust line successfully created for "IOU" tokens.')
// Issuer sends IOU tokens to creator ----------------------
console.log('\n=== Issuer Sending IOU Tokens to Escrow Creator ===\n')
const iouPaymentTx = {
TransactionType: 'Payment',
Account: issuer.address,
Destination: creator.address,
Amount: {
currency: currencyCode,
value: '5000',
issuer: issuer.address
}
}
xrpl.validate(iouPaymentTx)
console.log(JSON.stringify(iouPaymentTx, null, 2))
console.log(`\nSubmitting Trust Line Token payment transaction...`)
const iouPayResponse = await client.submitAndWait(iouPaymentTx, {
wallet: issuer,
autofill: true
})
if (iouPayResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`Trust Line Token payment failed: ${iouPayResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log(`Successfully sent 5000 ${currencyCode} tokens.`)
// Escrow Creator creates a timed trust line token escrow ----------------------
console.log('\n=== Creating Timed Trust Line Token Escrow ===\n')
const delay = 10 // seconds
const now = new Date()
const finishAfter = new Date(now.getTime() + delay * 1000)
const finishAfterRippleTime = xrpl.isoTimeToRippleTime(finishAfter.toISOString())
console.log(`Escrow will mature after: ${finishAfter.toLocaleString()}\n`)
const iouCancelAfter = new Date(now.getTime() + 300 * 1000)
const iouCancelAfterRippleTime = xrpl.isoTimeToRippleTime(iouCancelAfter.toISOString())
const iouEscrowCreateTx = {
TransactionType: 'EscrowCreate',
Account: creator.address,
Destination: issuer.address,
Amount: {
currency: currencyCode,
value: '1000',
issuer: issuer.address
},
FinishAfter: finishAfterRippleTime,
CancelAfter: iouCancelAfterRippleTime
}
xrpl.validate(iouEscrowCreateTx)
console.log(JSON.stringify(iouEscrowCreateTx, null, 2))
console.log(`\nSubmitting Trust Line Token EscrowCreate transaction...`)
const iouEscrowResponse = await client.submitAndWait(iouEscrowCreateTx, {
wallet: creator,
autofill: true
})
if (iouEscrowResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`Trust Line Token EscrowCreate failed: ${iouEscrowResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
// Save the sequence number to identify the escrow later
const iouEscrowSeq = iouEscrowResponse.result.tx_json.Sequence
console.log(`Trust Line Token escrow created. Sequence: ${iouEscrowSeq}`)
// Wait for the escrow to mature, then finish it --------------------
console.log(`\n=== Waiting For Timed Trust Line Token Escrow to Mature ===\n`)
// Sleep function to countdown delay until escrow matures
function sleep (delayInSeconds) {
return new Promise((resolve) => setTimeout(resolve, delayInSeconds * 1000))
}
for (let i = delay; i >= 0; i--) {
process.stdout.write(`\rWaiting for escrow to mature... ${i}s remaining...`)
await sleep(1)
}
console.log('\rWaiting for escrow to mature... done. ')
// Confirm latest validated ledger close time is after the FinishAfter time
let escrowReady = false
while (!escrowReady) {
const validatedLedger = await client.request({
command: 'ledger',
ledger_index: 'validated'
})
const ledgerCloseTime = validatedLedger.result.ledger.close_time
console.log(`Latest validated ledger closed at: ${new Date(xrpl.rippleTimeToISOTime(ledgerCloseTime)).toLocaleString()}`)
if (ledgerCloseTime > finishAfterRippleTime) {
escrowReady = true
console.log('Escrow confirmed ready to finish.')
} else {
let timeDifference = finishAfterRippleTime - ledgerCloseTime
if (timeDifference === 0) { timeDifference = 1 }
console.log(`Escrow needs to wait another ${timeDifference}s.`)
await sleep(timeDifference)
}
}
// Finish the timed trust line token escrow --------------------
console.log('\n=== Finishing Timed Trust Line Token Escrow ===\n')
const iouEscrowFinishTx = {
TransactionType: 'EscrowFinish',
Account: creator.address,
Owner: creator.address,
OfferSequence: iouEscrowSeq
}
xrpl.validate(iouEscrowFinishTx)
console.log(JSON.stringify(iouEscrowFinishTx, null, 2))
console.log(`\nSubmitting EscrowFinish transaction...`)
const iouFinishResponse = await client.submitAndWait(iouEscrowFinishTx, {
wallet: creator,
autofill: true
})
if (iouFinishResponse.result.meta.TransactionResult !== 'tesSUCCESS') {
console.error(`Trust Line Token EscrowFinish failed: ${iouFinishResponse.result.meta.TransactionResult}`)
await client.disconnect()
process.exit(1)
}
console.log(`Timed Trust Line Token escrow finished successfully: https://testnet.xrpl.org/transactions/${iouFinishResponse.result.hash}`)
await client.disconnect()

View File

@@ -22,6 +22,187 @@ python send_timed_escrow.py
python send_conditional_escrow.py
```
## Send Fungible Token Escrow
```sh
python send_fungible_token_escrow.py
```
The script issues an MPT and Trust Line Token, setting up both to be escrowable. It then creates and finishes a conditional escrow with the MPT and a timed escrow with the Trust Line Token.
```sh
=== Funding Accounts ===
Attempting to fund address rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2
Faucet fund successful.
Attempting to fund address rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU
Faucet fund successful.
Issuer: rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2
Escrow Creator: rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU
=== Creating MPT ===
{
"Account": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"TransactionType": "MPTokenIssuanceCreate",
"Flags": 8,
"SigningPubKey": "",
"MaximumAmount": "1000000"
}
Submitting MPTokenIssuanceCreate transaction...
MPT created: 00F7705DFE38372A760229755F9E4F5EADE06F2CE36BDA18
=== Escrow Creator Authorizing MPT ===
{
"Account": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"TransactionType": "MPTokenAuthorize",
"SigningPubKey": "",
"MPTokenIssuanceID": "00F7705DFE38372A760229755F9E4F5EADE06F2CE36BDA18"
}
Submitting MPTokenAuthorize transaction...
Escrow Creator authorized for MPT.
=== Issuer Sending MPTs to Escrow Creator ===
{
"Account": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"TransactionType": "Payment",
"SigningPubKey": "",
"Amount": {
"mpt_issuance_id": "00F7705DFE38372A760229755F9E4F5EADE06F2CE36BDA18",
"value": "5000"
},
"Destination": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU"
}
Submitting MPT Payment transaction...
Successfully sent 5000 MPTs to Escrow Creator.
=== Creating Conditional MPT Escrow ===
Condition: A02580202959C2DFA17829F23F8A7F2F3A81FE73F9E964A56810A250CB836DE1AB851E47810120
Fulfillment: A022802079204EBCCCF4816441F0D4F7B15E7003A757675FC90691107AB770044B07697B
{
"Account": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"TransactionType": "EscrowCreate",
"SigningPubKey": "",
"Amount": {
"mpt_issuance_id": "00F7705DFE38372A760229755F9E4F5EADE06F2CE36BDA18",
"value": "1000"
},
"Destination": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"CancelAfter": 828514495,
"Condition": "A02580202959C2DFA17829F23F8A7F2F3A81FE73F9E964A56810A250CB836DE1AB851E47810120"
}
Submitting MPT EscrowCreate transaction...
Conditional MPT escrow created. Sequence: 16216160
=== Finishing Conditional MPT Escrow ===
{
"Account": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"TransactionType": "EscrowFinish",
"SigningPubKey": "",
"Owner": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"OfferSequence": 16216160,
"Condition": "A02580202959C2DFA17829F23F8A7F2F3A81FE73F9E964A56810A250CB836DE1AB851E47810120",
"Fulfillment": "A022802079204EBCCCF4816441F0D4F7B15E7003A757675FC90691107AB770044B07697B"
}
Submitting EscrowFinish transaction...
Conditional MPT escrow finished successfully: https://testnet.xrpl.org/transactions/4FE4B0AD6FD9D8CD968F5AFD43C3E1F2180C40C3A20DE7416B1E16069D2340DD
=== Enabling Trust Line Token Escrows on Issuer ===
{
"Account": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"TransactionType": "AccountSet",
"SigningPubKey": "",
"SetFlag": 17
}
Submitting AccountSet transaction...
Trust line token escrows enabled by issuer.
=== Setting Up Trust Line ===
{
"Account": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"TransactionType": "TrustSet",
"SigningPubKey": "",
"LimitAmount": {
"currency": "IOU",
"issuer": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"value": "10000000"
}
}
Submitting TrustSet transaction...
Trust line successfully created for "IOU" tokens.
=== Issuer Sending IOU Tokens to Escrow Creator ===
{
"Account": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"TransactionType": "Payment",
"SigningPubKey": "",
"Amount": {
"currency": "IOU",
"issuer": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"value": "5000"
},
"Destination": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU"
}
Submitting Trust Line Token payment transaction...
Successfully sent 5000 IOU tokens.
=== Creating Timed Trust Line Token Escrow ===
Escrow will mature after: 04/02/2026, 11:50:39 PM
{
"Account": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"TransactionType": "EscrowCreate",
"SigningPubKey": "",
"Amount": {
"currency": "IOU",
"issuer": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"value": "1000"
},
"Destination": "rQBByeTLvRVQy9GLsqvsnczMB3QZ7b7gs2",
"CancelAfter": 828514529,
"FinishAfter": 828514239
}
Submitting Trust Line Token EscrowCreate transaction...
Trust Line Token escrow created. Sequence: 16216163
=== Waiting For Timed Trust Line Token Escrow to Mature ===
Waiting for escrow to mature... done.
Latest validated ledger closed at: 04/02/2026, 11:50:42 PM
Escrow confirmed ready to finish.
=== Finishing Timed Trust Line Token Escrow ===
{
"Account": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"TransactionType": "EscrowFinish",
"SigningPubKey": "",
"Owner": "rBkkT1Q3E3bm5tM5D5YazgX8cpq3a2V6zU",
"OfferSequence": 16216163
}
Submitting EscrowFinish transaction...
Timed Trust Line Token escrow finished successfully: https://testnet.xrpl.org/transactions/F3FCFE9D0E9A0A7CC6FA804526A509532833AEAD4C7A7BF1978194F4F1CCDED4
```
## List Escrows
```sh

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@@ -0,0 +1,301 @@
# This example demonstrates how to create escrows that hold fungible tokens.
# It covers MPTs and Trust Line Tokens, and uses conditional and timed escrows.
import json
from datetime import datetime, timedelta, UTC
from os import urandom
from time import sleep
from cryptoconditions import PreimageSha256
from xrpl.clients import JsonRpcClient
from xrpl.models import (
AccountSet,
EscrowCreate,
EscrowFinish,
MPTokenAuthorize,
MPTokenIssuanceCreate,
Payment,
TrustSet,
)
from xrpl.models.amounts import IssuedCurrencyAmount, MPTAmount
from xrpl.models.requests import Ledger
from xrpl.models.transactions.account_set import AccountSetAsfFlag
from xrpl.models.transactions.mptoken_issuance_create import MPTokenIssuanceCreateFlag
from xrpl.transaction import submit_and_wait
from xrpl.utils import datetime_to_ripple_time, ripple_time_to_datetime
from xrpl.wallet import generate_faucet_wallet
client = JsonRpcClient("https://s.altnet.rippletest.net:51234")
# Fund an issuer account and an escrow creator account ----------------------
print("\n=== Funding Accounts ===\n")
issuer = generate_faucet_wallet(client, debug=True)
creator = generate_faucet_wallet(client, debug=True)
print(f"Issuer: {issuer.address}")
print(f"Escrow Creator: {creator.address}")
# ====== Conditional MPT Escrow ======
# Issuer creates an MPT ----------------------
print("\n=== Creating MPT ===\n")
mpt_create_tx = MPTokenIssuanceCreate(
account=issuer.address,
maximum_amount="1000000",
flags=MPTokenIssuanceCreateFlag.TF_MPT_CAN_ESCROW,
)
print(json.dumps(mpt_create_tx.to_xrpl(), indent=2))
# Submit, sign, and wait for validation
print("\nSubmitting MPTokenIssuanceCreate transaction...")
mpt_create_response = submit_and_wait(mpt_create_tx, client, issuer)
if mpt_create_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"MPTokenIssuanceCreate failed: {mpt_create_response.result['meta']['TransactionResult']}")
exit(1)
# Extract the MPT issuance ID from the transaction result
mpt_issuance_id = mpt_create_response.result["meta"]["mpt_issuance_id"]
print(f"MPT created: {mpt_issuance_id}")
# Escrow Creator authorizes the MPT ----------------------
print("\n=== Escrow Creator Authorizing MPT ===\n")
mpt_auth_tx = MPTokenAuthorize(
account=creator.address,
mptoken_issuance_id=mpt_issuance_id,
)
print(json.dumps(mpt_auth_tx.to_xrpl(), indent=2))
print("\nSubmitting MPTokenAuthorize transaction...")
mpt_auth_response = submit_and_wait(mpt_auth_tx, client, creator)
if mpt_auth_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"MPTokenAuthorize failed: {mpt_auth_response.result['meta']['TransactionResult']}")
exit(1)
print("Escrow Creator authorized for MPT.")
# Issuer sends MPTs to escrow creator ----------------------
print("\n=== Issuer Sending MPTs to Escrow Creator ===\n")
mpt_payment_tx = Payment(
account=issuer.address,
destination=creator.address,
amount=MPTAmount(
mpt_issuance_id=mpt_issuance_id,
value="5000",
),
)
print(json.dumps(mpt_payment_tx.to_xrpl(), indent=2))
print("\nSubmitting MPT Payment transaction...")
mpt_payment_response = submit_and_wait(mpt_payment_tx, client, issuer)
if mpt_payment_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"MPT Payment failed: {mpt_payment_response.result['meta']['TransactionResult']}")
exit(1)
print("Successfully sent 5000 MPTs to Escrow Creator.")
# Escrow Creator creates a conditional MPT escrow ----------------------
print("\n=== Creating Conditional MPT Escrow ===\n")
# Generate crypto-condition
preimage = urandom(32)
fulfillment = PreimageSha256(preimage=preimage)
fulfillment_hex = fulfillment.serialize_binary().hex().upper()
condition_hex = fulfillment.condition_binary.hex().upper()
print(f"Condition: {condition_hex}")
print(f"Fulfillment: {fulfillment_hex}\n")
# Set expiration (300 seconds from now)
cancel_after = datetime.now(tz=UTC) + timedelta(seconds=300)
cancel_after_ripple_time = datetime_to_ripple_time(cancel_after)
mpt_escrow_create_tx = EscrowCreate(
account=creator.address,
destination=issuer.address,
amount=MPTAmount(
mpt_issuance_id=mpt_issuance_id,
value="1000",
),
condition=condition_hex,
cancel_after=cancel_after_ripple_time, # Fungible token escrows require a cancel_after time
)
print(json.dumps(mpt_escrow_create_tx.to_xrpl(), indent=2))
print("\nSubmitting MPT EscrowCreate transaction...")
mpt_escrow_response = submit_and_wait(mpt_escrow_create_tx, client, creator)
if mpt_escrow_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"MPT EscrowCreate failed: {mpt_escrow_response.result['meta']['TransactionResult']}")
exit(1)
# Save the sequence number to identify the escrow later
mpt_escrow_seq = mpt_escrow_response.result["tx_json"]["Sequence"]
print(f"Conditional MPT escrow created. Sequence: {mpt_escrow_seq}")
# Finish the conditional MPT escrow with the fulfillment ----------------------
print("\n=== Finishing Conditional MPT Escrow ===\n")
mpt_escrow_finish_tx = EscrowFinish(
account=creator.address,
owner=creator.address,
offer_sequence=mpt_escrow_seq,
condition=condition_hex,
fulfillment=fulfillment_hex,
)
print(json.dumps(mpt_escrow_finish_tx.to_xrpl(), indent=2))
print("\nSubmitting EscrowFinish transaction...")
mpt_finish_response = submit_and_wait(mpt_escrow_finish_tx, client, creator)
if mpt_finish_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"MPT EscrowFinish failed: {mpt_finish_response.result['meta']['TransactionResult']}")
exit(1)
print(f"Conditional MPT escrow finished successfully: https://testnet.xrpl.org/transactions/{mpt_finish_response.result['hash']}")
# ====== Timed Trust Line Token Escrow ======
# Enable trust line token escrows on the issuer ----------------------
print("\n=== Enabling Trust Line Token Escrows on Issuer ===\n")
account_set_tx = AccountSet(
account=issuer.address,
set_flag=AccountSetAsfFlag.ASF_ALLOW_TRUSTLINE_LOCKING,
)
print(json.dumps(account_set_tx.to_xrpl(), indent=2))
print("\nSubmitting AccountSet transaction...")
account_set_response = submit_and_wait(account_set_tx, client, issuer)
if account_set_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"AccountSet failed: {account_set_response.result['meta']['TransactionResult']}")
exit(1)
print("Trust line token escrows enabled by issuer.")
# Escrow Creator sets up a trust line to the issuer ----------------------
print("\n=== Setting Up Trust Line ===\n")
currency_code = "IOU"
trust_set_tx = TrustSet(
account=creator.address,
limit_amount=IssuedCurrencyAmount(
currency=currency_code,
issuer=issuer.address,
value="10000000",
),
)
print(json.dumps(trust_set_tx.to_xrpl(), indent=2))
print("\nSubmitting TrustSet transaction...")
trust_response = submit_and_wait(trust_set_tx, client, creator)
if trust_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"TrustSet failed: {trust_response.result['meta']['TransactionResult']}")
exit(1)
print('Trust line successfully created for "IOU" tokens.')
# Issuer sends IOU tokens to creator ----------------------
print("\n=== Issuer Sending IOU Tokens to Escrow Creator ===\n")
iou_payment_tx = Payment(
account=issuer.address,
destination=creator.address,
amount=IssuedCurrencyAmount(
currency=currency_code,
value="5000",
issuer=issuer.address,
),
)
print(json.dumps(iou_payment_tx.to_xrpl(), indent=2))
print("\nSubmitting Trust Line Token payment transaction...")
iou_pay_response = submit_and_wait(iou_payment_tx, client, issuer)
if iou_pay_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"Trust Line Token payment failed: {iou_pay_response.result['meta']['TransactionResult']}")
exit(1)
print(f"Successfully sent 5000 {currency_code} tokens.")
# Escrow Creator creates a timed trust line token escrow ----------------------
print("\n=== Creating Timed Trust Line Token Escrow ===\n")
delay = 10 # seconds
now = datetime.now(tz=UTC)
finish_after = now + timedelta(seconds=delay)
finish_after_ripple_time = datetime_to_ripple_time(finish_after)
mature_time = finish_after.astimezone().strftime("%m/%d/%Y, %I:%M:%S %p")
print(f"Escrow will mature after: {mature_time}\n")
iou_cancel_after = now + timedelta(seconds=300)
iou_cancel_after_ripple_time = datetime_to_ripple_time(iou_cancel_after)
iou_escrow_create_tx = EscrowCreate(
account=creator.address,
destination=issuer.address,
amount=IssuedCurrencyAmount(
currency=currency_code,
value="1000",
issuer=issuer.address,
),
finish_after=finish_after_ripple_time,
cancel_after=iou_cancel_after_ripple_time,
)
print(json.dumps(iou_escrow_create_tx.to_xrpl(), indent=2))
print("\nSubmitting Trust Line Token EscrowCreate transaction...")
iou_escrow_response = submit_and_wait(iou_escrow_create_tx, client, creator)
if iou_escrow_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"Trust Line Token EscrowCreate failed: {iou_escrow_response.result['meta']['TransactionResult']}")
exit(1)
# Save the sequence number to identify the escrow later
iou_escrow_seq = iou_escrow_response.result["tx_json"]["Sequence"]
print(f"Trust Line Token escrow created. Sequence: {iou_escrow_seq}")
# Wait for the escrow to mature, then finish it --------------------
print("\n=== Waiting For Timed Trust Line Token Escrow to Mature ===\n")
# Countdown delay until escrow matures
for i in range(delay, -1, -1):
print(f"Waiting for escrow to mature... {i}s remaining...", end="\r", flush=True)
sleep(1)
print("Waiting for escrow to mature... done. ")
# Confirm latest validated ledger close time is after the finish_after time
escrow_ready = False
while not escrow_ready:
validated_ledger = client.request(Ledger(ledger_index="validated"))
ledger_close_time = validated_ledger.result["ledger"]["close_time"]
ledger_close_local = ripple_time_to_datetime(ledger_close_time).astimezone().strftime("%m/%d/%Y, %I:%M:%S %p")
print(f"Latest validated ledger closed at: {ledger_close_local}")
if ledger_close_time > finish_after_ripple_time:
escrow_ready = True
print("Escrow confirmed ready to finish.")
else:
time_difference = finish_after_ripple_time - ledger_close_time
if time_difference == 0:
time_difference = 1
print(f"Escrow needs to wait another {time_difference}s.")
sleep(time_difference)
# Finish the timed trust line token escrow --------------------
print("\n=== Finishing Timed Trust Line Token Escrow ===\n")
iou_escrow_finish_tx = EscrowFinish(
account=creator.address,
owner=creator.address,
offer_sequence=iou_escrow_seq,
)
print(json.dumps(iou_escrow_finish_tx.to_xrpl(), indent=2))
print("\nSubmitting EscrowFinish transaction...")
iou_finish_response = submit_and_wait(iou_escrow_finish_tx, client, creator)
if iou_finish_response.result["meta"]["TransactionResult"] != "tesSUCCESS":
print(f"Trust Line Token EscrowFinish failed: {iou_finish_response.result['meta']['TransactionResult']}")
exit(1)
print(f"Timed Trust Line Token escrow finished successfully: https://testnet.xrpl.org/transactions/{iou_finish_response.result['hash']}")

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---
seo:
description: Create and finish escrows that hold fungible tokens (MPTs and trust line tokens) on the XRP Ledger.
metadata:
indexPage: true
labels:
- Escrow
---
# Send Fungible Token Escrows
This tutorial shows you how to create and finish escrows that hold fungible tokens on the XRP Ledger. It covers two types of fungible token escrows:
- **Conditional MPT escrow**: An escrow holding [Multi-Purpose Tokens](../../concepts/tokens/fungible-tokens/multi-purpose-tokens.md) that is released when a crypto-condition is fulfilled.
- **Timed trust line token escrow**: An escrow holding [trust line tokens](../../concepts/tokens/fungible-tokens/trust-line-tokens.md) that is released after a specified time.
{% admonition type="info" name="Note" %}
Though this tutorial covers these two specific scenarios, both fungible token types can be used in either conditional or timed escrows.
{% /admonition %}
{% amendment-disclaimer name="TokenEscrow" /%}
## Goals
By the end of this tutorial, you will be able to:
- Issue an MPT with escrow support enabled.
- Create and finish a conditional escrow that holds MPTs.
- Enable trust line token escrows on an issuer account.
- Create and finish a timed escrow that holds trust line tokens.
## Prerequisites
To complete this tutorial, you should:
- Have a basic understanding of the XRP Ledger.
- Have an XRP Ledger client library installed. This page provides examples for the following:
- **JavaScript** with the [xrpl.js library][]. See [Get Started Using JavaScript][] for setup steps.
- **Python** with the [xrpl-py library][]. See [Get Started Using Python][] for setup steps.
- **Go** with the [xrpl-go library][]. See [Get Started Using Go][] for setup steps.
## Source Code
You can find the complete source code for this tutorial's examples in the {% repo-link path="_code-samples/escrow/" %}code samples section of this website's repository{% /repo-link %}.
## Steps
### 1. Install dependencies
{% tabs %}
{% tab label="JavaScript" %}
From the code sample folder, use `npm` to install dependencies.
```bash
npm install
```
{% /tab %}
{% tab label="Python" %}
From the code sample folder, set up a virtual environment and use `pip` to install dependencies.
```bash
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt
```
{% /tab %}
{% tab label="Go" %}
From the code sample folder, use `go` to install dependencies.
```bash
go mod tidy
```
{% /tab %}
{% /tabs %}
### 2. Set up client and fund accounts
Import the necessary libraries, instantiate a client to connect to the XRPL, and fund two new accounts (**Issuer** and **Escrow Creator**). This example imports:
{% tabs %}
{% tab label="JavaScript" %}
- `xrpl`: Used for XRPL client connection, transaction submission, and wallet handling.
- `five-bells-condition` and `crypto`: Used to generate a crypto-condition.
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" before="// ====== Conditional MPT Escrow ======" /%}
{% /tab %}
{% tab label="Python" %}
- `xrpl`: Used for XRPL client connection, transaction submission, and wallet handling.
- `json`: Used for loading and formatting JSON data.
- `os` and `cryptoconditions`: Used to generate a crypto-condition.
- `datetime` and `time`: Used for time calculations.
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" before="# ====== Conditional MPT Escrow ======" /%}
{% /tab %}
{% tab label="Go" %}
- `xrpl-go`: Used for XRPL client connection, transaction submission, and wallet handling.
- `encoding/json`, `strings`, and `fmt`: Used for formatting and printing results to the console.
- `cryptoconditions`, `crypto/rand` and `encoding/hex`: Used to generate a crypto-condition.
- `time`: Used for time calculations.
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" before="// ====== Conditional MPT Escrow ======" /%}
{% /tab %}
{% /tabs %}
### 3. Issue an MPT with escrow support
Construct an [MPTokenIssuanceCreate transaction][] with the `tfMPTCanEscrow` flag, which enables the token to be held in escrows. Then, retrieve the MPT issuance ID from the transaction result. This example creates an escrow that sends MPTs back to the original issuer. If you wanted to create an escrow for another account, the issuer would also have to set the `tfMPTCanTransfer` flag.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// ====== Conditional MPT Escrow ======" before="// Escrow Creator authorizes the MPT" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# ====== Conditional MPT Escrow ======" before="# Escrow Creator authorizes the MPT" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// ====== Conditional MPT Escrow ======" before="// Escrow Creator authorizes the MPT" /%}
{% /tab %}
{% /tabs %}
### 4. Authorize the MPT
Before the escrow creator can hold the MPT, they must indicate their willingness to hold it with the [MPTokenAuthorize transaction][].
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Escrow Creator authorizes the MPT" before="// Issuer sends MPTs to escrow creator" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Escrow Creator authorizes the MPT" before="# Issuer sends MPTs to escrow creator" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Escrow Creator authorizes the MPT" before="// Issuer sends MPTs to escrow creator" /%}
{% /tab %}
{% /tabs %}
### 5. Send MPTs to the escrow creator
Send MPTs from the issuer to the escrow creator using a [Payment transaction][].
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Issuer sends MPTs to escrow creator" before="// Escrow Creator creates a conditional MPT escrow" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Issuer sends MPTs to escrow creator" before="# Escrow Creator creates a conditional MPT escrow" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Issuer sends MPTs to escrow creator" before="// Escrow Creator creates a conditional MPT escrow" /%}
{% /tab %}
{% /tabs %}
### 6. Create a condition and fulfillment
Conditional escrows require a fulfillment and its corresponding condition in the format of a PREIMAGE-SHA-256 _crypto-condition_, represented as hexadecimal. To calculate these in the correct format, use a crypto-conditions library. Generally, you want to generate the fulfillment using at least 32 random bytes from a cryptographically secure source of randomness.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Escrow Creator creates a conditional MPT escrow" before="// Set expiration" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Escrow Creator creates a conditional MPT escrow" before="# Set expiration" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Escrow Creator creates a conditional MPT escrow" before="// Set expiration" /%}
{% /tab %}
{% /tabs %}
### 7. Create the conditional MPT escrow
Create a conditional escrow using the generated crypto-condition. Fungible token escrows require an expiration date. This example sets an expiration time of five minutes. After creating the escrow, save the sequence number to reference it later.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Set expiration" before="// Finish the conditional MPT escrow" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Set expiration" before="# Finish the conditional MPT escrow" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Set expiration" before="// Finish the conditional MPT escrow" /%}
{% /tab %}
{% /tabs %}
### 8. Finish the conditional MPT escrow
Finish the escrow by providing the original condition and its matching fulfillment.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Finish the conditional MPT escrow" before="// ====== Timed Trust Line Token Escrow ======" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Finish the conditional MPT escrow" before="# ====== Timed Trust Line Token Escrow ======" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Finish the conditional MPT escrow" before="// ====== Timed Trust Line Token Escrow ======" /%}
{% /tab %}
{% /tabs %}
### 9. Enable trust line token escrows
Token issuers enable trust line token escrows differently from MPTs. Unlike MPTs, which are escrowable at the token level, trust line tokens are escrowable at the account level. When an issuer enables the `asfAllowTrustLineLocking` flag on their account, _all_ trust line tokens issued from that account are escrowable.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// ====== Timed Trust Line Token Escrow ======" before="// Escrow Creator sets up a trust line" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# ====== Timed Trust Line Token Escrow ======" before="# Escrow Creator sets up a trust line" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// ====== Timed Trust Line Token Escrow ======" before="// Escrow Creator sets up a trust line" /%}
{% /tab %}
{% /tabs %}
### 10. Set up a trust line
Establish a trust line between the escrow creator and issuer using the [TrustSet transaction][]. The escrow creator submits this transaction to indicate their willingness to receive the token, defining the currency and maximum amount they're willing to hold.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Escrow Creator sets up a trust line" before="// Issuer sends IOU tokens to creator" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Escrow Creator sets up a trust line" before="# Issuer sends IOU tokens to creator" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Escrow Creator sets up a trust line" before="// Issuer sends IOU tokens to creator" /%}
{% /tab %}
{% /tabs %}
### 11. Send IOU tokens to the escrow creator
Send IOU tokens from the issuer to the escrow creator using a [Payment transaction][].
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Issuer sends IOU tokens to creator" before="// Escrow Creator creates a timed trust line token escrow" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Issuer sends IOU tokens to creator" before="# Escrow Creator creates a timed trust line token escrow" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Issuer sends IOU tokens to creator" before="// Escrow Creator creates a timed trust line token escrow" /%}
{% /tab %}
{% /tabs %}
### 12. Create a timed trust line token escrow
To make a timed escrow, set the maturity time of the escrow, which is a timestamp formatted as [seconds since the Ripple Epoch][]. This example sets a maturity time of ten seconds from the time the code executes. Since it is a fungible token escrow, it also sets an expiration time of five minutes. After submitting the [EscrowCreate transaction][], save the sequence number from the transaction result.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Escrow Creator creates a timed trust line token escrow" before="// Wait for the escrow to mature" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Escrow Creator creates a timed trust line token escrow" before="# Wait for the escrow to mature" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Escrow Creator creates a timed trust line token escrow" before="// Wait for the escrow to mature" /%}
{% /tab %}
{% /tabs %}
### 13. Wait for escrow to mature and finish
Wait for the escrow to mature. Before submitting the [EscrowFinish][] transaction, the code checks the current validated ledger to confirm the close time is after the escrow maturation time. This check ensures the escrow is matured on a validated ledger before trying to finish it.
{% tabs %}
{% tab label="JavaScript" %}
{% code-snippet file="/_code-samples/escrow/js/sendFungibleTokenEscrow.js" language="js" from="// Wait for the escrow to mature" /%}
{% /tab %}
{% tab label="Python" %}
{% code-snippet file="/_code-samples/escrow/py/send_fungible_token_escrow.py" language="py" from="# Wait for the escrow to mature" /%}
{% /tab %}
{% tab label="Go" %}
{% code-snippet file="/_code-samples/escrow/go/send-fungible-token-escrow/main.go" language="go" from="// Wait for the escrow to mature" /%}
{% /tab %}
{% /tabs %}
## See Also
**Concepts**:
- [Escrow](../../concepts/payment-types/escrow.md)
- [Multi-Purpose Tokens](../../concepts/tokens/fungible-tokens/multi-purpose-tokens.md)
- [Trust Line Tokens](../../concepts/tokens/fungible-tokens/trust-line-tokens.md)
**Tutorials**:
- [Look up Escrows](./look-up-escrows.md)
- [Cancel an Expired Escrow](./cancel-an-expired-escrow.md)
**References**:
- [EscrowCreate transaction][]
- [EscrowFinish transaction][]
{% raw-partial file="/docs/_snippets/common-links.md" /%}

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@@ -251,6 +251,7 @@
- page: docs/tutorials/payments/create-trust-line-send-currency-in-python.md
- page: docs/tutorials/payments/send-a-conditional-escrow.md
- page: docs/tutorials/payments/send-a-timed-escrow.md
- page: docs/tutorials/payments/send-fungible-token-escrows.md
- page: docs/tutorials/payments/look-up-escrows.md
- page: docs/tutorials/payments/cancel-an-expired-escrow.md
- page: docs/tutorials/payments/send-a-check.md