feat: modifiable definitions.json values at runtime via encode/decode parameter (#2127)

packages/ripple-binary-codec/HISTORY.md

@@ -1,6 +1,8 @@
 # ripple-binary-codec Release History
 
 ## Unreleased
+### Added
+- Allow custom type definitions to be used for encoding/decoding transactions at runtime (e.g. for sidechains/new amendments)
 
 ## 1.5.0 (2023-03-08)
 ### Changed

packages/ripple-binary-codec/src/binary.ts

@@ -6,7 +6,11 @@ import { AccountID } from './types/account-id'
 import { HashPrefix } from './hash-prefixes'
 import { BinarySerializer, BytesList } from './serdes/binary-serializer'
 import { sha512Half, transactionID } from './hashes'
-import { FieldInstance } from './enums'
+import {
+  type XrplDefinitionsBase,
+  DEFAULT_DEFINITIONS,
+  type FieldInstance,
+} from './enums'
 import { STObject } from './types/st-object'
 import { JsonObject } from './types/serialized-type'
 import { Buffer } from 'buffer/'
@@ -16,26 +20,41 @@ import bigInt = require('big-integer')
  * Construct a BinaryParser
  *
  * @param bytes hex-string to construct BinaryParser from
+ * @param definitions rippled definitions used to parse the values of transaction types and such.
+ *                          Can be customized for sidechains and amendments.
  * @returns A BinaryParser
  */
-const makeParser = (bytes: string): BinaryParser => new BinaryParser(bytes)
+const makeParser = (
+  bytes: string,
+  definitions?: XrplDefinitionsBase,
+): BinaryParser => new BinaryParser(bytes, definitions)
 
 /**
  * Parse BinaryParser into JSON
  *
  * @param parser BinaryParser object
+ * @param definitions rippled definitions used to parse the values of transaction types and such.
+ *                          Can be customized for sidechains and amendments.
  * @returns JSON for the bytes in the BinaryParser
  */
-const readJSON = (parser: BinaryParser): JsonObject =>
+const readJSON = (
-  (parser.readType(coreTypes.STObject) as STObject).toJSON()
+  parser: BinaryParser,
+  definitions: XrplDefinitionsBase = DEFAULT_DEFINITIONS,
+): JsonObject =>
+  (parser.readType(coreTypes.STObject) as STObject).toJSON(definitions)
 
 /**
  * Parse a hex-string into its JSON interpretation
  *
  * @param bytes hex-string to parse into JSON
+ * @param definitions rippled definitions used to parse the values of transaction types and such.
+ *                          Can be customized for sidechains and amendments.
  * @returns JSON
  */
-const binaryToJSON = (bytes: string): JsonObject => readJSON(makeParser(bytes))
+const binaryToJSON = (
+  bytes: string,
+  definitions?: XrplDefinitionsBase,
+): JsonObject => readJSON(makeParser(bytes, definitions), definitions)
 
 /**
  * Interface for passing parameters to SerializeObject
@@ -46,17 +65,18 @@ interface OptionObject {
   prefix?: Buffer
   suffix?: Buffer
   signingFieldsOnly?: boolean
+  definitions?: XrplDefinitionsBase
 }
 
 /**
  * Function to serialize JSON object representing a transaction
  *
  * @param object JSON object to serialize
- * @param opts options for serializing, including optional prefix, suffix, and signingFieldOnly
+ * @param opts options for serializing, including optional prefix, suffix, signingFieldOnly, and definitions
  * @returns A Buffer containing the serialized object
  */
 function serializeObject(object: JsonObject, opts: OptionObject = {}): Buffer {
-  const { prefix, suffix, signingFieldsOnly = false } = opts
+  const { prefix, suffix, signingFieldsOnly = false, definitions } = opts
   const bytesList = new BytesList()
 
   if (prefix) {
@@ -66,8 +86,9 @@ function serializeObject(object: JsonObject, opts: OptionObject = {}): Buffer {
   const filter = signingFieldsOnly
     ? (f: FieldInstance): boolean => f.isSigningField
     : undefined
-
+  ;(coreTypes.STObject as typeof STObject)
-  coreTypes.STObject.from(object, filter).toBytesSink(bytesList)
+    .from(object, filter, definitions)
+    .toBytesSink(bytesList)
 
   if (suffix) {
     bytesList.put(suffix)
@@ -81,13 +102,19 @@ function serializeObject(object: JsonObject, opts: OptionObject = {}): Buffer {
  *
  * @param transaction Transaction to serialize
  * @param prefix Prefix bytes to put before the serialized object
+ * @param opts.definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns A Buffer with the serialized object
  */
 function signingData(
   transaction: JsonObject,
   prefix: Buffer = HashPrefix.transactionSig,
+  opts: { definitions?: XrplDefinitionsBase } = {},
 ): Buffer {
-  return serializeObject(transaction, { prefix, signingFieldsOnly: true })
+  return serializeObject(transaction, {
+    prefix,
+    signingFieldsOnly: true,
+    definitions: opts.definitions,
+  })
 }
 
 /**
@@ -102,6 +129,7 @@ interface ClaimObject extends JsonObject {
  * Serialize a signingClaim
  *
  * @param claim A claim object to serialize
+ * @param opts.definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns the serialized object with appropriate prefix
  */
 function signingClaimData(claim: ClaimObject): Buffer {
@@ -123,11 +151,15 @@ function signingClaimData(claim: ClaimObject): Buffer {
  *
  * @param transaction transaction to serialize
  * @param signingAccount Account to sign the transaction with
+ * @param opts.definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns serialized transaction with appropriate prefix and suffix
  */
 function multiSigningData(
   transaction: JsonObject,
   signingAccount: string | AccountID,
+  opts: { definitions: XrplDefinitionsBase } = {
+    definitions: DEFAULT_DEFINITIONS,
+  },
 ): Buffer {
   const prefix = HashPrefix.transactionMultiSig
   const suffix = coreTypes.AccountID.from(signingAccount).toBytes()
@@ -135,6 +167,7 @@ function multiSigningData(
     prefix,
     suffix,
     signingFieldsOnly: true,
+    definitions: opts.definitions,
   })
 }
 

packages/ripple-binary-codec/src/coretypes.ts

@@ -1,4 +1,5 @@
 import {
+  DEFAULT_DEFINITIONS,
   Field,
   TransactionType,
   LedgerEntryType,
@@ -17,6 +18,7 @@ export {
   hashes,
   binary,
   ledgerHashes,
+  DEFAULT_DEFINITIONS,
   Field,
   TransactionType,
   LedgerEntryType,

packages/ripple-binary-codec/src/enums/README.md

@@ -1,5 +1,9 @@
 # Definitions
 
+This file is used to serialize/deserialize transactions and ledger objects for the XRPL. It's broken into 5 sections laid out below.
+
+At the bottom of this README you can find instructions and examples for how to define your own types in a definitions file in order to work on a custom sidechain or develop new amendments.
+
 ## Types
 
 These are the [types](https://xrpl.org/serialization.html#type-list) associated with a given Serialization Field. Each type has an arbitrary [type_code](https://xrpl.org/serialization.html#type-codes), with lower codes sorting first.
@@ -53,8 +57,88 @@ See:
 - https://github.com/ripple/rippled/blob/develop/src/ripple/protocol/TER.h
 - https://xrpl.org/transaction-results.html
 
-TODO: Write a script to read rippled's source file and generate the necessary mapping.
+To generate a new definitions file from rippled source code, use this tool: https://github.com/RichardAH/xrpl-codec-gen
 
 ## Transaction Types
 
 See https://github.com/ripple/rippled/blob/develop/src/ripple/protocol/TxFormats.h
+
+# Defining Your Own Definitions
+
+If you're building your own sidechain or writing an amendment for the XRPL, you may need to create new XRPL definitions.
+
+To do that there are a couple things you need to do:
+
+1. Generate your own `definitions.json` file from rippled source code using [this tool](https://github.com/RichardAH/xrpl-codec-gen) (The default `definitions.json` for mainnet can be found [here](https://github.com/XRPLF/xrpl.js/blob/main/packages/ripple-binary-codec/src/enums/definitions.json))
+2. Create new SerializedType classes for any new Types (So that encode/decode behavior is defined). The SerializedType classes correspond to "ST..." classes in Rippled. Note: This is very rarely required.
+
+- For examples of how to implement that you can look at objects in the [`types` folder](../types/), such as `Amount`, `UInt8`, or `STArray`.
+
+3. Import your `definitions.json` file to construct your own `XrplDefinitions` object.
+4. Pass the `XrplDefinitions` object whenever you `encode` or `decode` a transaction.
+5. If you added any new transaction types, you should create an `interface` for the transaction that extends `BaseTransaction` from the `xrpl` repo to use it with the functions on `Client` (See the below example of adding a new transaction type)
+
+## Example of adding a new Transaction type
+
+```
+// newDefinitionsJson is where you can import your custom defined definitions.json file
+const newDefinitionsJson = require('./new-transaction-type-definitions.json')
+const { XrplDefinitions, Client } = require('xrpl')
+
+const newDefs = new XrplDefinitions(newDefinitionsJson)
+
+// Change to point at the server you care about
+const serverAddress = 'wss://s.devnet.rippletest.net:51233'
+const client = new Client(serverAddress)
+const wallet1 = await client.fundWallet()
+
+// Extending BaseTransaction allows typescript to recognize this as a transaction type
+interface NewTx extends BaseTransaction {
+    Amount: Amount
+}
+
+const tx: NewTx = {
+    // The TransactionType here needs to match what you added in your newDefinitionsJson file
+    TransactionType: 'NewTx',
+    Account: wallet1.address,
+    Amount: '100',
+}
+
+// By passing in your newDefs, your new transaction should be serializable.
+// Rippled will still throw an error though if it's not a supported transaction type.
+const result = await client.submitAndWait(tx, {
+    wallet: wallet1,
+    definitions: newDefs,
+})
+```
+
+## Example of adding a new serializable Type
+
+```
+const { XrplDefinitions } = require('../dist/coretypes')
+
+// newDefinitionsJson is where you can import your custom defined definitions.json file
+const newDefinitionsJson = require('./fixtures/new-definitions.json')
+
+
+// For any new Types you create, you'll need to make a class with the same name which extends a SerializedType object
+// In order to define how to serialize/deserialize that field. Here we simply make our NewType act like a UInt32.
+
+const { UInt32 } = require('../dist/types/uint-32')
+class NewType extends UInt32 {
+  // Should be the same as UInt32
+}
+
+const extendedCoreTypes = { NewType }
+
+const newDefs = new XrplDefinitions(newDefinitionsJson, extendedCoreTypes)
+
+// From this point on, we should be able to serialize / deserialize Transactions with fields that have 'NewType' as their Type.
+
+const encoded = encode(my_tx, newDefs)
+const decoded = decode(encoded, newDefs)
+```
+
+## Other examples
+
+You can find other examples of how to modify `definitions.json` in `definition.test.js` which contains tests for this feature, and uses various example modified `definition` files. You can find the tests and the corresponding example `definition` files in [this folder of test cases](https://github.com/XRPLF/xrpl.js/tree/main/packages/ripple-binary-codec/test)

packages/ripple-binary-codec/src/enums/bytes.ts

@@ -0,0 +1,75 @@
+import { BytesList, BinaryParser } from '../binary'
+import { Buffer } from 'buffer/'
+
+/*
+ * @brief: Bytes, name, and ordinal representing one type, ledger_type, transaction type, or result
+ */
+export class Bytes {
+  readonly bytes: Buffer
+
+  constructor(
+    readonly name: string,
+    readonly ordinal: number,
+    readonly ordinalWidth: number,
+  ) {
+    this.bytes = Buffer.alloc(ordinalWidth)
+    for (let i = 0; i < ordinalWidth; i++) {
+      this.bytes[ordinalWidth - i - 1] = (ordinal >>> (i * 8)) & 0xff
+    }
+  }
+
+  toJSON(): string {
+    return this.name
+  }
+
+  toBytesSink(sink: BytesList): void {
+    sink.put(this.bytes)
+  }
+
+  toBytes(): Uint8Array {
+    return this.bytes
+  }
+}
+
+/*
+ * @brief: Collection of Bytes objects, mapping bidirectionally
+ */
+export class BytesLookup {
+  constructor(types: Record<string, number>, readonly ordinalWidth: number) {
+    Object.entries(types).forEach(([k, v]) => {
+      this.add(k, v)
+    })
+  }
+
+  /**
+   * Add a new name value pair to the BytesLookup.
+   *
+   * @param name - A human readable name for the field.
+   * @param value - The numeric value for the field.
+   * @throws if the name or value already exist in the lookup because it's unclear how to decode.
+   */
+  add(name: string, value: number): void {
+    if (this[name]) {
+      throw new SyntaxError(
+        `Attempted to add a value with a duplicate name "${name}". This is not allowed because it is unclear how to decode.`,
+      )
+    }
+    if (this[value.toString()]) {
+      throw new SyntaxError(
+        `Attempted to add a duplicate value under a different name (Given name: "${name}" and previous name: "${
+          this[value.toString()]
+        }. This is not allowed because it is unclear how to decode.\nGiven value: ${value.toString()}`,
+      )
+    }
+    this[name] = new Bytes(name, value, this.ordinalWidth)
+    this[value.toString()] = this[name]
+  }
+
+  from(value: Bytes | string): Bytes {
+    return value instanceof Bytes ? value : (this[value] as Bytes)
+  }
+
+  fromParser(parser: BinaryParser): Bytes {
+    return this.from(parser.readUIntN(this.ordinalWidth).toString())
+  }
+}

packages/ripple-binary-codec/src/enums/constants.ts

@@ -0,0 +1,4 @@
+export const TYPE_WIDTH = 2
+export const LEDGER_ENTRY_WIDTH = 2
+export const TRANSACTION_TYPE_WIDTH = 2
+export const TRANSACTION_RESULT_WIDTH = 1

packages/ripple-binary-codec/src/enums/field.ts

@@ -0,0 +1,85 @@
+import { Bytes } from './bytes'
+import { SerializedType } from '../types/serialized-type'
+import { TYPE_WIDTH } from './constants'
+import { Buffer } from 'buffer/'
+
+/**
+ * Encoding information for a rippled field, often used in transactions.
+ * See the enums [README.md](https://github.com/XRPLF/xrpl.js/tree/main/packages/ripple-binary-codec/src/enums) for more details on what each means.
+ */
+export interface FieldInfo {
+  nth: number
+  isVLEncoded: boolean
+  isSerialized: boolean
+  isSigningField: boolean
+  type: string
+}
+
+export interface FieldInstance {
+  readonly nth: number
+  readonly isVariableLengthEncoded: boolean
+  readonly isSerialized: boolean
+  readonly isSigningField: boolean
+  readonly type: Bytes
+  readonly ordinal: number
+  readonly name: string
+  readonly header: Buffer
+  readonly associatedType: typeof SerializedType
+}
+
+/*
+ * @brief: Serialize a field based on type_code and Field.nth
+ */
+function fieldHeader(type: number, nth: number): Buffer {
+  const header: Array<number> = []
+  if (type < 16) {
+    if (nth < 16) {
+      header.push((type << 4) | nth)
+    } else {
+      header.push(type << 4, nth)
+    }
+  } else if (nth < 16) {
+    header.push(nth, type)
+  } else {
+    header.push(0, type, nth)
+  }
+  return Buffer.from(header)
+}
+
+function buildField(
+  [name, info]: [string, FieldInfo],
+  typeOrdinal: number,
+): FieldInstance {
+  const field = fieldHeader(typeOrdinal, info.nth)
+  return {
+    name: name,
+    nth: info.nth,
+    isVariableLengthEncoded: info.isVLEncoded,
+    isSerialized: info.isSerialized,
+    isSigningField: info.isSigningField,
+    ordinal: (typeOrdinal << 16) | info.nth,
+    type: new Bytes(info.type, typeOrdinal, TYPE_WIDTH),
+    header: field,
+    associatedType: SerializedType, // For later assignment in ./types/index.js or Definitions.updateAll(...)
+  }
+}
+
+/*
+ * @brief: The collection of all fields as defined in definitions.json
+ */
+export class FieldLookup {
+  constructor(
+    fields: Array<[string, FieldInfo]>,
+    types: Record<string, number>,
+  ) {
+    fields.forEach(([name, field_info]) => {
+      const typeOrdinal = types[field_info.type]
+      this[name] = buildField([name, field_info], typeOrdinal)
+      this[this[name].ordinal.toString()] = this[name]
+    })
+  }
+
+  fromString(value: string): FieldInstance {
+    return this[value] as FieldInstance
+  }
+}

packages/ripple-binary-codec/src/enums/index.ts

@@ -1,164 +1,34 @@
 import * as enums from './definitions.json'
-import { SerializedType } from '../types/serialized-type'
+import {
-import { Buffer } from 'buffer/'
+  XrplDefinitionsBase,
-import { BytesList } from '../binary'
+  FieldInstance,
+  Bytes,
+} from './xrpl-definitions-base'
+/**
+ * By default, coreTypes from the `types` folder is where known type definitions are initialized to avoid import cycles.
+ */
+const DEFAULT_DEFINITIONS = new XrplDefinitionsBase(enums, {})
+
+const Type = DEFAULT_DEFINITIONS.type
+const LedgerEntryType = DEFAULT_DEFINITIONS.ledgerEntryType
+const TransactionType = DEFAULT_DEFINITIONS.transactionType
+const TransactionResult = DEFAULT_DEFINITIONS.transactionResult
+const Field = DEFAULT_DEFINITIONS.field
 
 /*
  * @brief: All valid transaction types
  */
-export const TRANSACTION_TYPES = Object.entries(enums.TRANSACTION_TYPES)
+const TRANSACTION_TYPES = DEFAULT_DEFINITIONS.transactionNames
-  .filter(([_key, value]) => value >= 0)
-  .map(([key, _value]) => key)
-
-const TYPE_WIDTH = 2
-const LEDGER_ENTRY_WIDTH = 2
-const TRANSACTION_TYPE_WIDTH = 2
-const TRANSACTION_RESULT_WIDTH = 1
-
-/*
- * @brief: Serialize a field based on type_code and Field.nth
- */
-function fieldHeader(type: number, nth: number): Buffer {
-  const header: Array<number> = []
-  if (type < 16) {
-    if (nth < 16) {
-      header.push((type << 4) | nth)
-    } else {
-      header.push(type << 4, nth)
-    }
-  } else if (nth < 16) {
-    header.push(nth, type)
-  } else {
-    header.push(0, type, nth)
-  }
-  return Buffer.from(header)
-}
-
-/*
- * @brief: Bytes, name, and ordinal representing one type, ledger_type, transaction type, or result
- */
-export class Bytes {
-  readonly bytes: Buffer
-
-  constructor(
-    readonly name: string,
-    readonly ordinal: number,
-    readonly ordinalWidth: number,
-  ) {
-    this.bytes = Buffer.alloc(ordinalWidth)
-    for (let i = 0; i < ordinalWidth; i++) {
-      this.bytes[ordinalWidth - i - 1] = (ordinal >>> (i * 8)) & 0xff
-    }
-  }
-
-  toJSON(): string {
-    return this.name
-  }
-
-  toBytesSink(sink: BytesList): void {
-    sink.put(this.bytes)
-  }
-
-  toBytes(): Uint8Array {
-    return this.bytes
-  }
-}
-
-/*
- * @brief: Collection of Bytes objects, mapping bidirectionally
- */
-class BytesLookup {
-  constructor(types: Record<string, number>, readonly ordinalWidth: number) {
-    Object.entries(types).forEach(([k, v]) => {
-      this[k] = new Bytes(k, v, ordinalWidth)
-      this[v.toString()] = this[k]
-    })
-  }
-
-  from(value: Bytes | string): Bytes {
-    return value instanceof Bytes ? value : (this[value] as Bytes)
-  }
-
-  fromParser(parser): Bytes {
-    return this.from(parser.readUIntN(this.ordinalWidth).toString())
-  }
-}
-
-/*
- * type FieldInfo is the type of the objects containing information about each field in definitions.json
- */
-interface FieldInfo {
-  nth: number
-  isVLEncoded: boolean
-  isSerialized: boolean
-  isSigningField: boolean
-  type: string
-}
-
-interface FieldInstance {
-  readonly nth: number
-  readonly isVariableLengthEncoded: boolean
-  readonly isSerialized: boolean
-  readonly isSigningField: boolean
-  readonly type: Bytes
-  readonly ordinal: number
-  readonly name: string
-  readonly header: Buffer
-  readonly associatedType: typeof SerializedType
-}
-
-function buildField([name, info]: [string, FieldInfo]): FieldInstance {
-  const typeOrdinal = enums.TYPES[info.type]
-  const field = fieldHeader(typeOrdinal, info.nth)
-  return {
-    name: name,
-    nth: info.nth,
-    isVariableLengthEncoded: info.isVLEncoded,
-    isSerialized: info.isSerialized,
-    isSigningField: info.isSigningField,
-    ordinal: (typeOrdinal << 16) | info.nth,
-    type: new Bytes(info.type, typeOrdinal, TYPE_WIDTH),
-    header: field,
-    associatedType: SerializedType, // For later assignment in ./types/index.js
-  }
-}
-
-/*
- * @brief: The collection of all fields as defined in definitions.json
- */
-class FieldLookup {
-  constructor(fields: Array<[string, FieldInfo]>) {
-    fields.forEach(([k, v]) => {
-      this[k] = buildField([k, v])
-      this[this[k].ordinal.toString()] = this[k]
-    })
-  }
-
-  fromString(value: string): FieldInstance {
-    return this[value] as FieldInstance
-  }
-}
-
-const Type = new BytesLookup(enums.TYPES, TYPE_WIDTH)
-const LedgerEntryType = new BytesLookup(
-  enums.LEDGER_ENTRY_TYPES,
-  LEDGER_ENTRY_WIDTH,
-)
-const TransactionType = new BytesLookup(
-  enums.TRANSACTION_TYPES,
-  TRANSACTION_TYPE_WIDTH,
-)
-const TransactionResult = new BytesLookup(
-  enums.TRANSACTION_RESULTS,
-  TRANSACTION_RESULT_WIDTH,
-)
-const Field = new FieldLookup(enums.FIELDS as Array<[string, FieldInfo]>)
 
 export {
+  Bytes,
+  XrplDefinitionsBase,
+  DEFAULT_DEFINITIONS,
   Field,
   FieldInstance,
   Type,
   LedgerEntryType,
   TransactionResult,
   TransactionType,
+  TRANSACTION_TYPES,
 }

packages/ripple-binary-codec/src/enums/xrpl-definitions-base.ts

@@ -0,0 +1,111 @@
+import { SerializedType } from '../types/serialized-type'
+import { Bytes, BytesLookup } from './bytes'
+import { FieldInfo, FieldLookup, FieldInstance } from './field'
+import {
+  TYPE_WIDTH,
+  LEDGER_ENTRY_WIDTH,
+  TRANSACTION_TYPE_WIDTH,
+  TRANSACTION_RESULT_WIDTH,
+} from './constants'
+
+interface DefinitionsData {
+  TYPES: Record<string, number>
+  LEDGER_ENTRY_TYPES: Record<string, number>
+  FIELDS: (string | FieldInfo)[][]
+  TRANSACTION_RESULTS: Record<string, number>
+  TRANSACTION_TYPES: Record<string, number>
+}
+
+/**
+ * Stores the various types and fields for rippled to be used to encode/decode information later on.
+ * XrplDefinitions should be instantiated instead of this class.
+ */
+class XrplDefinitionsBase {
+  // A collection of fields that can be included in transactions
+  field: FieldLookup
+  // A collection of ids corresponding to types of ledger objects
+  ledgerEntryType: BytesLookup
+  // A collection of type flags used to determine how to serialize a field's data
+  type: BytesLookup
+  // Errors and result codes for transactions
+  transactionResult: BytesLookup
+  // Defined transactions that can be submitted to the ledger
+  transactionType: BytesLookup
+  // Valid transaction names
+  transactionNames: string[]
+  // Maps serializable types to their TypeScript class implementation
+  dataTypes: Record<string, typeof SerializedType>
+
+  /**
+   * Present rippled types in a typed and updatable format.
+   * For an example of the input format see `definitions.json`
+   * To generate a new definitions file from rippled source code, use this tool: https://github.com/RichardAH/xrpl-codec-gen
+   *
+   * See the definitions.test.js file for examples of how to create your own updated definitions.json.
+   *
+   * @param enums - A json encoding of the core types, transaction types, transaction results, transaction names, and fields.
+   * @param types - A list of type objects with the same name as the fields defined.
+   *              You can use the coreTypes object if you are not adding new types.
+   */
+  constructor(
+    enums: DefinitionsData,
+    types: Record<string, typeof SerializedType>,
+  ) {
+    this.type = new BytesLookup(enums.TYPES, TYPE_WIDTH)
+    this.ledgerEntryType = new BytesLookup(
+      enums.LEDGER_ENTRY_TYPES,
+      LEDGER_ENTRY_WIDTH,
+    )
+    this.transactionType = new BytesLookup(
+      enums.TRANSACTION_TYPES,
+      TRANSACTION_TYPE_WIDTH,
+    )
+    this.transactionResult = new BytesLookup(
+      enums.TRANSACTION_RESULTS,
+      TRANSACTION_RESULT_WIDTH,
+    )
+    this.field = new FieldLookup(
+      enums.FIELDS as Array<[string, FieldInfo]>,
+      enums.TYPES,
+    )
+    this.transactionNames = Object.entries(enums.TRANSACTION_TYPES)
+      .filter(([_key, value]) => value >= 0)
+      .map(([key, _value]) => key)
+
+    this.dataTypes = {} // Filled in via associateTypes
+    this.associateTypes(types)
+  }
+
+  /**
+   * Associates each Field to a corresponding class that TypeScript can recognize.
+   *
+   * @param types a list of type objects with the same name as the fields defined.
+   *              Defaults to xrpl.js's core type definitions.
+   */
+  public associateTypes(types: Record<string, typeof SerializedType>): void {
+    // Overwrite any existing type definitions with the given types
+    this.dataTypes = Object.assign({}, this.dataTypes, types)
+
+    Object.values(this.field).forEach((field) => {
+      field.associatedType = this.dataTypes[field.type.name]
+    })
+
+    this.field['TransactionType'].associatedType = this.transactionType
+    this.field['TransactionResult'].associatedType = this.transactionResult
+    this.field['LedgerEntryType'].associatedType = this.ledgerEntryType
+  }
+
+  public getAssociatedTypes(): Record<string, typeof SerializedType> {
+    return this.dataTypes
+  }
+}
+
+export {
+  DefinitionsData,
+  XrplDefinitionsBase,
+  FieldLookup,
+  FieldInfo,
+  FieldInstance,
+  Bytes,
+  BytesLookup,
+}

packages/ripple-binary-codec/src/enums/xrpl-definitions.ts

@@ -0,0 +1,32 @@
+import {
+  type DefinitionsData,
+  XrplDefinitionsBase,
+} from './xrpl-definitions-base'
+import { coreTypes } from '../types'
+import { SerializedType } from '../types/serialized-type'
+
+/**
+ * Stores the various types and fields for rippled to be used to encode/decode information later on.
+ * Should be used instead of XrplDefinitionsBase since this defines default `types` for serializing/deserializing
+ * ledger data.
+ */
+export class XrplDefinitions extends XrplDefinitionsBase {
+  /**
+   * Present rippled types in a typed and updatable format.
+   * For an example of the input format see `definitions.json`
+   * To generate a new definitions file from rippled source code, use this tool: https://github.com/RichardAH/xrpl-codec-gen
+   *
+   * See the definitions.test.js file for examples of how to create your own updated definitions.json.
+   *
+   * @param enums - A json encoding of the core types, transaction types, transaction results, transaction names, and fields.
+   * @param additionalTypes - A list of SerializedType objects with the same name as the fields defined.
+   *              These types will be included in addition to the coreTypes used on mainnet.
+   */
+  constructor(
+    enums: DefinitionsData,
+    additionalTypes?: Record<string, typeof SerializedType>,
+  ) {
+    const types = Object.assign({}, coreTypes, additionalTypes)
+    super(enums, types)
+  }
+}

packages/ripple-binary-codec/src/index.ts

@@ -1,9 +1,15 @@
 import * as assert from 'assert'
-import { quality, binary } from './coretypes'
+import { quality, binary, HashPrefix } from './coretypes'
 import { decodeLedgerData } from './ledger-hashes'
 import { ClaimObject } from './binary'
 import { JsonObject } from './types/serialized-type'
-import { TRANSACTION_TYPES } from './enums'
+import {
+  XrplDefinitionsBase,
+  TRANSACTION_TYPES,
+  DEFAULT_DEFINITIONS,
+} from './enums'
+import { XrplDefinitions } from './enums/xrpl-definitions'
+import { coreTypes } from './types'
 
 const {
   signingData,
@@ -17,22 +23,25 @@ const {
  * Decode a transaction
  *
  * @param binary hex-string of the encoded transaction
+ * @param definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns the JSON representation of the transaction
  */
-function decode(binary: string): JsonObject {
+function decode(binary: string, definitions?: XrplDefinitionsBase): JsonObject {
   assert.ok(typeof binary === 'string', 'binary must be a hex string')
-  return binaryToJSON(binary)
+  return binaryToJSON(binary, definitions)
 }
 
 /**
  * Encode a transaction
  *
  * @param json The JSON representation of a transaction
+ * @param definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
+ *
  * @returns A hex-string of the encoded transaction
  */
-function encode(json: object): string {
+function encode(json: object, definitions?: XrplDefinitionsBase): string {
   assert.ok(typeof json === 'object')
-  return serializeObject(json as JsonObject)
+  return serializeObject(json as JsonObject, { definitions })
     .toString('hex')
     .toUpperCase()
 }
@@ -42,11 +51,17 @@ function encode(json: object): string {
  *
  * @param json JSON object representing the transaction
  * @param signer string representing the account to sign the transaction with
+ * @param definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns a hex string of the encoded transaction
  */
-function encodeForSigning(json: object): string {
+function encodeForSigning(
+  json: object,
+  definitions?: XrplDefinitionsBase,
+): string {
   assert.ok(typeof json === 'object')
-  return signingData(json as JsonObject)
+  return signingData(json as JsonObject, HashPrefix.transactionSig, {
+    definitions,
+  })
     .toString('hex')
     .toUpperCase()
 }
@@ -56,6 +71,7 @@ function encodeForSigning(json: object): string {
  *
  * @param json JSON object representing the transaction
  * @param signer string representing the account to sign the transaction with
+ * @param definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns a hex string of the encoded transaction
  */
 function encodeForSigningClaim(json: object): string {
@@ -70,12 +86,18 @@ function encodeForSigningClaim(json: object): string {
  *
  * @param json JSON object representing the transaction
  * @param signer string representing the account to sign the transaction with
+ * @param definitions Custom rippled types to use instead of the default. Used for sidechains and amendments.
  * @returns a hex string of the encoded transaction
  */
-function encodeForMultisigning(json: object, signer: string): string {
+function encodeForMultisigning(
+  json: object,
+  signer: string,
+  definitions?: XrplDefinitionsBase,
+): string {
   assert.ok(typeof json === 'object')
   assert.equal(json['SigningPubKey'], '')
-  return multiSigningData(json as JsonObject, signer)
+  const definitionsOpt = definitions ? { definitions } : undefined
+  return multiSigningData(json as JsonObject, signer, definitionsOpt)
     .toString('hex')
     .toUpperCase()
 }
@@ -112,4 +134,8 @@ export {
   decodeQuality,
   decodeLedgerData,
   TRANSACTION_TYPES,
+  XrplDefinitions,
+  XrplDefinitionsBase,
+  DEFAULT_DEFINITIONS,
+  coreTypes,
 }

packages/ripple-binary-codec/src/ledger-hashes.ts

@@ -11,6 +11,7 @@ import { UInt8 } from './types/uint-8'
 import { BinaryParser } from './serdes/binary-parser'
 import { JsonObject } from './types/serialized-type'
 import bigInt = require('big-integer')
+import { XrplDefinitionsBase } from './enums'
 
 /**
  * Computes the hash of a list of objects
@@ -160,11 +161,16 @@ function ledgerHash(header: ledgerObject): Hash256 {
  * Decodes a serialized ledger header
  *
  * @param binary A serialized ledger header
+ * @param definitions Type definitions to parse the ledger objects.
+ *      Used if there are non-default ledger objects to decode.
  * @returns A JSON object describing a ledger header
  */
-function decodeLedgerData(binary: string): object {
+function decodeLedgerData(
+  binary: string,
+  definitions?: XrplDefinitionsBase,
+): object {
   assert.ok(typeof binary === 'string', 'binary must be a hex string')
-  const parser = new BinaryParser(binary)
+  const parser = new BinaryParser(binary, definitions)
   return {
     ledger_index: parser.readUInt32(),
     total_coins: parser.readType(UInt64).valueOf().toString(),

packages/ripple-binary-codec/src/serdes/binary-parser.ts

@@ -1,6 +1,10 @@
 import * as assert from 'assert'
-import { Field, FieldInstance } from '../enums'
+import {
-import { SerializedType } from '../types/serialized-type'
+  XrplDefinitionsBase,
+  DEFAULT_DEFINITIONS,
+  FieldInstance,
+} from '../enums'
+import { type SerializedType } from '../types/serialized-type'
 import { Buffer } from 'buffer/'
 
 /**
@@ -8,14 +12,21 @@ import { Buffer } from 'buffer/'
  */
 class BinaryParser {
   private bytes: Buffer
+  definitions: XrplDefinitionsBase
 
   /**
    * Initialize bytes to a hex string
    *
    * @param hexBytes a hex string
+   * @param definitions Rippled definitions used to parse the values of transaction types and such.
+   *                          Can be customized for sidechains and amendments.
    */
-  constructor(hexBytes: string) {
+  constructor(
+    hexBytes: string,
+    definitions: XrplDefinitionsBase = DEFAULT_DEFINITIONS,
+  ) {
     this.bytes = Buffer.from(hexBytes, 'hex')
+    this.definitions = definitions
   }
 
   /**
@@ -146,7 +157,7 @@ class BinaryParser {
    * @return The field represented by the bytes at the head of the BinaryParser
    */
   readField(): FieldInstance {
-    return Field.fromString(this.readFieldOrdinal().toString())
+    return this.definitions.field.fromString(this.readFieldOrdinal().toString())
   }
 
   /**

packages/ripple-binary-codec/src/serdes/binary-serializer.ts

@@ -1,6 +1,6 @@
 import * as assert from 'assert'
 import { FieldInstance } from '../enums'
-import { SerializedType } from '../types/serialized-type'
+import { type SerializedType } from '../types/serialized-type'
 import { Buffer } from 'buffer/'
 
 /**

packages/ripple-binary-codec/src/shamap.ts

@@ -130,7 +130,7 @@ class ShaMapInner extends ShaMapNode {
    */
   hash(): Hash256 {
     if (this.empty()) {
-      return coreTypes.Hash256.ZERO_256
+      return (coreTypes.Hash256 as typeof Hash256).ZERO_256
     }
     const hash = Sha512Half.put(this.hashPrefix())
     this.toBytesSink(hash)
@@ -145,7 +145,9 @@ class ShaMapInner extends ShaMapNode {
   toBytesSink(list: BytesList): void {
     for (let i = 0; i < this.branches.length; i++) {
       const branch = this.branches[i]
-      const hash = branch ? branch.hash() : coreTypes.Hash256.ZERO_256
+      const hash = branch
+        ? branch.hash()
+        : (coreTypes.Hash256 as typeof Hash256).ZERO_256
       hash.toBytesSink(list)
     }
   }

packages/ripple-binary-codec/src/types/index.ts

@@ -1,9 +1,3 @@
-import {
-  Field,
-  TransactionResult,
-  TransactionType,
-  LedgerEntryType,
-} from '../enums'
 import { AccountID } from './account-id'
 import { Amount } from './amount'
 import { Blob } from './blob'
@@ -19,8 +13,10 @@ import { UInt32 } from './uint-32'
 import { UInt64 } from './uint-64'
 import { UInt8 } from './uint-8'
 import { Vector256 } from './vector-256'
+import { type SerializedType } from './serialized-type'
+import { DEFAULT_DEFINITIONS } from '../enums'
 
-const coreTypes = {
+const coreTypes: Record<string, typeof SerializedType> = {
   AccountID,
   Amount,
   Blob,
@@ -38,12 +34,26 @@ const coreTypes = {
   Vector256,
 }
 
-Object.values(Field).forEach((field) => {
+// Ensures that the DEFAULT_DEFINITIONS object connects these types to fields for serializing/deserializing
-  field.associatedType = coreTypes[field.type.name]
+// This is done here instead of in enums/index.ts to avoid a circular dependency
-})
+// because some of the above types depend on BinarySerailizer which depends on enums/index.ts.
+DEFAULT_DEFINITIONS.associateTypes(coreTypes)
 
-Field['TransactionType'].associatedType = TransactionType
+export {
-Field['TransactionResult'].associatedType = TransactionResult
+  coreTypes,
-Field['LedgerEntryType'].associatedType = LedgerEntryType
+  AccountID,
-
+  Amount,
-export { coreTypes }
+  Blob,
+  Currency,
+  Hash128,
+  Hash160,
+  Hash256,
+  PathSet,
+  STArray,
+  STObject,
+  UInt8,
+  UInt16,
+  UInt32,
+  UInt64,
+  Vector256,
+}

packages/ripple-binary-codec/src/types/st-object.ts

@@ -1,4 +1,9 @@
-import { Field, FieldInstance, Bytes } from '../enums'
+import {
+  DEFAULT_DEFINITIONS,
+  FieldInstance,
+  Bytes,
+  XrplDefinitionsBase,
+} from '../enums'
 import { SerializedType, JsonObject } from './serialized-type'
 import { xAddressToClassicAddress, isValidXAddress } from 'ripple-address-codec'
 import { BinaryParser } from '../serdes/binary-parser'
@@ -83,11 +88,13 @@ class STObject extends SerializedType {
    *
    * @param value An object to include
    * @param filter optional, denote which field to include in serialized object
+   * @param definitions optional, types and values to use to encode/decode a transaction
    * @returns a STObject object
    */
   static from<T extends STObject | JsonObject>(
     value: T,
     filter?: (...any) => boolean,
+    definitions: XrplDefinitionsBase = DEFAULT_DEFINITIONS,
   ): STObject {
     if (value instanceof STObject) {
       return value
@@ -108,7 +115,7 @@ class STObject extends SerializedType {
     }, {})
 
     let sorted = Object.keys(xAddressDecoded)
-      .map((f: string): FieldInstance => Field[f] as FieldInstance)
+      .map((f: string): FieldInstance => definitions.field[f] as FieldInstance)
       .filter(
         (f: FieldInstance): boolean =>
           f !== undefined &&
@@ -155,11 +162,12 @@ class STObject extends SerializedType {
 
   /**
    * Get the JSON interpretation of this.bytes
-   *
+   * @param definitions rippled definitions used to parse the values of transaction types and such.
+   *                          Can be customized for sidechains and amendments.
    * @returns a JSON object
    */
-  toJSON(): JsonObject {
+  toJSON(definitions?: XrplDefinitionsBase): JsonObject {
-    const objectParser = new BinaryParser(this.toString())
+    const objectParser = new BinaryParser(this.toString(), definitions)
     const accumulator = {}
 
     while (!objectParser.end()) {

packages/ripple-binary-codec/test/definitions.test.js

@@ -0,0 +1,100 @@
+const { encode, decode, XrplDefinitions } = require('../src')
+const normalDefinitionsJson = require('../src/enums/definitions.json')
+const { UInt32 } = require('../dist/types/uint-32')
+
+const txJson = {
+  Account: 'r9LqNeG6qHxjeUocjvVki2XR35weJ9mZgQ',
+  Amount: '1000',
+  Destination: 'rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh',
+  Fee: '10',
+  Flags: 0,
+  Sequence: 1,
+  TransactionType: 'Payment',
+}
+
+describe('encode and decode using new types as a parameter', function () {
+  test('can encode and decode a new TransactionType', function () {
+    const tx = { ...txJson, TransactionType: 'NewTestTransaction' }
+    // Before updating the types, this should not be encodable
+    expect(() => encode(tx)).toThrow()
+
+    // Normally this would be generated directly from rippled with something like `server_definitions`.
+    // Added here to make it easier to see what is actually changing in the definitions.json file.
+    const definitions = JSON.parse(JSON.stringify(normalDefinitionsJson))
+    definitions.TRANSACTION_TYPES['NewTestTransaction'] = 30
+
+    const newDefs = new XrplDefinitions(definitions)
+
+    const encoded = encode(tx, newDefs)
+    expect(() => decode(encoded)).toThrow()
+    const decoded = decode(encoded, newDefs)
+    expect(decoded).toStrictEqual(tx)
+  })
+
+  test('can encode and decode a new Field', function () {
+    const tx = { ...txJson, NewFieldDefinition: 10 }
+
+    // Before updating the types, undefined fields will be ignored on encode
+    expect(decode(encode(tx))).not.toStrictEqual(tx)
+
+    // Normally this would be generated directly from rippled with something like `server_definitions`.
+    // Added here to make it easier to see what is actually changing in the definitions.json file.
+    const definitions = JSON.parse(JSON.stringify(normalDefinitionsJson))
+
+    definitions.FIELDS.push([
+      'NewFieldDefinition',
+      {
+        nth: 100,
+        isVLEncoded: false,
+        isSerialized: true,
+        isSigningField: true,
+        type: 'UInt32',
+      },
+    ])
+
+    const newDefs = new XrplDefinitions(definitions)
+
+    const encoded = encode(tx, newDefs)
+    expect(() => decode(encoded)).toThrow()
+    const decoded = decode(encoded, newDefs)
+    expect(decoded).toStrictEqual(tx)
+  })
+
+  test('can encode and decode a new Type', function () {
+    const tx = {
+      ...txJson,
+      TestField: 10, // Should work the same as a UInt32
+    }
+
+    // Normally this would be generated directly from rippled with something like `server_definitions`.
+    // Added here to make it easier to see what is actually changing in the definitions.json file.
+    const definitions = JSON.parse(JSON.stringify(normalDefinitionsJson))
+    definitions.TYPES.NewType = 24
+    definitions.FIELDS.push([
+      'TestField',
+      {
+        nth: 100,
+        isVLEncoded: true,
+        isSerialized: true,
+        isSigningField: true,
+        type: 'NewType',
+      },
+    ])
+
+    // Test that before updating the types this tx fails to decode correctly. Note that undefined fields are ignored on encode.
+    expect(decode(encode(tx))).not.toStrictEqual(tx)
+
+    class NewType extends UInt32 {
+      // Should be the same as UInt32
+    }
+
+    const extendedCoreTypes = { NewType }
+
+    const newDefs = new XrplDefinitions(definitions, extendedCoreTypes)
+
+    const encoded = encode(tx, newDefs)
+    expect(() => decode(encoded)).toThrow()
+    const decoded = decode(encoded, newDefs)
+    expect(decoded).toStrictEqual(tx)
+  })
+})

packages/ripple-binary-codec/test/signing-data-encoding.test.js

@@ -4,6 +4,9 @@ const {
   encodeForSigningClaim,
   encodeForMultisigning,
 } = require('../src')
+const { XrplDefinitions } = require('../src/enums/xrpl-definitions')
+
+const normalDefinitions = require('../src/enums/definitions.json')
 
 const tx_json = {
   Account: 'r9LqNeG6qHxjeUocjvVki2XR35weJ9mZgQ',
@@ -67,6 +70,53 @@ describe('Signing data', function () {
     )
   })
 
+  test('can create single signing blobs with modified type', function () {
+    const customPaymentDefinitions = JSON.parse(
+      JSON.stringify(normalDefinitions),
+    )
+    customPaymentDefinitions.TRANSACTION_TYPES.Payment = 31
+
+    const newDefs = new XrplDefinitions(customPaymentDefinitions)
+    const actual = encodeForSigning(tx_json, newDefs)
+    expect(actual).toBe(
+      [
+        '53545800', // signingPrefix
+        // TransactionType
+        '12',
+        '001F',
+        // Flags
+        '22',
+        '80000000',
+        // Sequence
+        '24',
+        '00000001',
+        // Amount
+        '61',
+        // native amount
+        '40000000000003E8',
+        // Fee
+        '68',
+        // native amount
+        '400000000000000A',
+        // SigningPubKey
+        '73',
+        // VLLength
+        '21',
+        'ED5F5AC8B98974A3CA843326D9B88CEBD0560177B973EE0B149F782CFAA06DC66A',
+        // Account
+        '81',
+        // VLLength
+        '14',
+        '5B812C9D57731E27A2DA8B1830195F88EF32A3B6',
+        // Destination
+        '83',
+        // VLLength
+        '14',
+        'B5F762798A53D543A014CAF8B297CFF8F2F937E8',
+      ].join(''),
+    )
+  })
+
   test('can fail gracefully for invalid TransactionType', function () {
     const invalidTransactionType = {
       ...tx_json,
@@ -78,7 +128,7 @@ describe('Signing data', function () {
 
   test('can create multi signing blobs', function () {
     const signingAccount = 'rJZdUusLDtY9NEsGea7ijqhVrXv98rYBYN'
-    const signingJson = Object.assign({}, tx_json, { SigningPubKey: '' })
+    const signingJson = { ...tx_json, SigningPubKey: '' }
     const actual = encodeForMultisigning(signingJson, signingAccount)
     expect(actual).toBe(
       [
@@ -120,6 +170,58 @@ describe('Signing data', function () {
       ].join(''),
     )
   })
+
+  test('can create multi signing blobs with custom definitions', function () {
+    const customPaymentDefinitions = JSON.parse(
+      JSON.stringify(normalDefinitions),
+    )
+    customPaymentDefinitions.TRANSACTION_TYPES.Payment = 31
+
+    const newDefs = new XrplDefinitions(customPaymentDefinitions)
+    const signingAccount = 'rJZdUusLDtY9NEsGea7ijqhVrXv98rYBYN'
+    const signingJson = { ...tx_json, SigningPubKey: '' }
+    const actual = encodeForMultisigning(signingJson, signingAccount, newDefs)
+    expect(actual).toBe(
+      [
+        '534D5400', // signingPrefix
+        // TransactionType
+        '12',
+        '001F',
+        // Flags
+        '22',
+        '80000000',
+        // Sequence
+        '24',
+        '00000001',
+        // Amount
+        '61',
+        // native amount
+        '40000000000003E8',
+        // Fee
+        '68',
+        // native amount
+        '400000000000000A',
+        // SigningPubKey
+        '73',
+        // VLLength
+        '00',
+        // '',
+        // Account
+        '81',
+        // VLLength
+        '14',
+        '5B812C9D57731E27A2DA8B1830195F88EF32A3B6',
+        // Destination
+        '83',
+        // VLLength
+        '14',
+        'B5F762798A53D543A014CAF8B297CFF8F2F937E8',
+        // signingAccount suffix
+        'C0A5ABEF242802EFED4B041E8F2D4A8CC86AE3D1',
+      ].join(''),
+    )
+  })
+
   test('can create claim blob', function () {
     const channel =
       '43904CBFCDCEC530B4037871F86EE90BF799DF8D2E0EA564BC8A3F332E4F5FB1'

packages/xrpl/test/wallet/signer.test.ts

@@ -139,7 +139,9 @@ describe('Signer', function () {
   it('multisign runs successfully with tx_blobs', function () {
     const transactions = [multisignTxToCombine1, multisignTxToCombine2]
 
-    const encodedTransactions: string[] = transactions.map(encode)
+    const encodedTransactions: string[] = transactions.map((transaction) =>
+      encode(transaction),
+    )
 
     assert.deepEqual(multisign(encodedTransactions), expectedMultisign)
   })