Recursive Length Prefix Encoding Module. 

davidmurdoch

micaiahreid

truffle-cicd

jeff.smale

@ganache/rlp

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Object.defineProperty(exports, "__esModule", { value: true });

exports.decode = exports.encodeLength = exports.encode = exports.digest = exports.encodeRange = void 0;

const utils_1 = require("@ganache/utils");

 * Begin RLP encoding of `items`, from `start` until `length`. Call `RLP.digest` to

function encodeRange(items, start, length) {

 * Finishes encoding started by `encodeRange`.

 * @returns returns a Buffer of encoded data

function digest(ranges, length, offset = 0, alloc = Buffer.allocUnsafe) {

    const encodedLength = encodeLength(length, 192);

    const lengthEncodedLength = encodedLength.length;

    const buf = Buffer.allocUnsafe(lengthEncodedLength + length);

    encodedLength.copy(buf, 0, 0, lengthEncodedLength);

    const buf = alloc(lengthEncodedLength + length);

    encodedLength.copy(buf, offset, 0, lengthEncodedLength);

    for (let i = 0, l = ranges.length; i < l; i++) {

        for (let j = 0, m = range.length; j < m; j++) {

            entry.copy(buf, offset, 0, size);

 * RLP Encoding based on: https://github.com/ethereum/wiki/wiki/%5BEnglish%5D-RLP

        for (let i = 0, l = input.length; i < l; i++) {

            const enc = encode(input[i]);

        const buf = Buffer.concat(output, length);

        const encodedLength = encodeLength(length, 192);

        return Buffer.concat([encodedLength, buf], encodedLength.length + length);

            const buf = Buffer.allocUnsafe(1);

            if (length === 1 && input[0] < 128) {

                const encLength = encodeLength(length, 128);

                return Buffer.concat([encLength, input], encLength.length + length);

        const buf = Buffer.allocUnsafe(1);

        const hexLength = (0, utils_1.uintToBuffer)(len);

        const lLength = hexLength.length;

        const firstByte = (0, utils_1.uintToBuffer)(offset + 55 + lLength);

        return Buffer.concat([firstByte, hexLength], firstByte.length + lLength);

 * Slices a Buffer, throws if the slice goes out-of-bounds of the Buffer.

 * E.g. `safeSlice(hexToBytes('aa'), 1, 2)` will throw.

        throw new Error("invalid RLP (safeSlice): end slice of Buffer out-of-bounds");

 * RLP Decoding based on https://eth.wiki/en/fundamentals/rlp

 * @param input Will be converted to Buffer

 * @returns decoded Array of Buffers containing the original message

    if (decoded.remainder.length !== 0) {

        throw new Error("invalid RLP: remainder must be zero");

 * Parse integers. Check if there is no leading zeros

        throw new Error("invalid RLP: extra zeros");

  "description": "Recursive Length Prefix Encoding Module",

  "homepage": "https://github.com/trufflesuite/ganache/tree/develop/src/packages/rlp#readme",

    "url": "https://github.com/trufflesuite/ganache.git",

    "mocha": "cross-env DE_FILES=true mocha --exit --check-leaks --throw-deprecation --trace-warnings --require ts-node/register 'tests/**/*.test.ts'"

    "url": "https://github.com/trufflesuite/ganache/issues"

  "gitHead": "533f002248ad58ae670a346883fc74031637bcf5"

  "gitHead": "7cba77c07030f113ddad4258fdf3dd0150f8bcbf"

import type { RangeOf, Remainders } from "./types";

export declare type Input = Buffer | Buffer[] | List;

export interface List extends Array<Input> {

export declare type EncodingInput = Buffer[] | EncodingList;

export interface EncodingList extends Array<EncodingInput | Buffer> {

export declare type NestedBuffer = Array<Buffer | NestedBuffer>;

export interface Decoded<T extends Buffer | NestedBuffer> {

export declare function encodeRange<T extends EncodingInput | Readonly<EncodingInput>, Start extends RangeOf<T["length"]>>(items: T, start: Start, length: Exclude<Remainders<T["length"], Start>, 0>): EncodedPart;

export declare function digest(ranges: Readonly<Buffer[]>[], length: number): Buffer;

export declare function digest(ranges: Readonly<Buffer[]>[], length: number, offset?: number, alloc?: typeof Buffer.allocUnsafe): Buffer;

export declare function encode(input: Input | Readonly<Input>): Buffer;

export declare function encodeLength(len: number, offset: number): Buffer;

export declare function decode<T extends Buffer | NestedBuffer = Buffer | NestedBuffer>(input: Buffer): T;

		@@ -6,3 +6,3 @@ {
		},
		"version": "0.7.1",
		"version": "0.8.0",
		"description": "Recursive Length Prefix Encoding Module",
		@@ -52,3 +52,3 @@ "author": "David Murdoch",
		"dependencies": {
		"@ganache/utils": "0.7.1",
		"@ganache/utils": "0.8.0",
		"rlp": "2.2.7"
		@@ -64,3 +64,3 @@ },
		},
		"gitHead": "533f002248ad58ae670a346883fc74031637bcf5"
		"gitHead": "7cba77c07030f113ddad4258fdf3dd0150f8bcbf"
		}

Improved metrics

Dependency changes

		@@ -29,8 +29,8 @@ "use strict";
		*/
		function digest(ranges, length) {
		function digest(ranges, length, offset = 0, alloc = Buffer.allocUnsafe) {
		const encodedLength = encodeLength(length, 192);
		const lengthEncodedLength = encodedLength.length;
		const buf = Buffer.allocUnsafe(lengthEncodedLength + length);
		encodedLength.copy(buf, 0, 0, lengthEncodedLength);
		let offset = lengthEncodedLength;
		const buf = alloc(lengthEncodedLength + length);
		encodedLength.copy(buf, offset, 0, lengthEncodedLength);
		offset += lengthEncodedLength;
		for (let i = 0, l = ranges.length; i < l; i++) {
		@@ -37,0 +37,0 @@ const range = ranges[i];

		@@ -30,3 +30,3 @@ /// <reference types="node" />
		*/
		export declare function digest(ranges: Readonly<Buffer[]>[], length: number): Buffer;
		export declare function digest(ranges: Readonly<Buffer[]>[], length: number, offset?: number, alloc?: typeof Buffer.allocUnsafe): Buffer;
		/**
		@@ -33,0 +33,0 @@ * RLP Encoding based on: https://github.com/ethereum/wiki/wiki/%5BEnglish%5D-RLP