ripple-lib/dist/npm/common/hashes/index.js

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.computePaymentChannelHash = exports.computeEscrowHash = exports.computeLedgerHash = exports.computeStateTreeHash = exports.computeTransactionTreeHash = exports.computeTrustlineHash = exports.computeOrderID = exports.computeSignerListLedgerObjectID = exports.computeAccountLedgerObjectID = exports.computeBinaryTransactionSigningHash = exports.computeTransactionHash = exports.computeBinaryTransactionHash = void 0;
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const ripple_address_codec_1 = require("ripple-address-codec");
const sha512Half_1 = __importDefault(require("./sha512Half"));
const hash_prefix_1 = __importDefault(require("./hash-prefix"));
const shamap_1 = require("./shamap");
const ripple_binary_codec_1 = require("ripple-binary-codec");
const ledgerspaces_1 = __importDefault(require("./ledgerspaces"));
const padLeftZero = (string, length) => {
    return Array(length - string.length + 1).join('0') + string;
};
const intToHex = (integer, byteLength) => {
    return padLeftZero(Number(integer).toString(16), byteLength * 2);
};
const bytesToHex = (bytes) => {
    return Buffer.from(bytes).toString('hex');
};
const bigintToHex = (integerString, byteLength) => {
    const hex = new bignumber_js_1.default(integerString).toString(16);
    return padLeftZero(hex, byteLength * 2);
};
const ledgerSpaceHex = (name) => {
    return intToHex(ledgerspaces_1.default[name].charCodeAt(0), 2);
};
const addressToHex = (address) => {
    return Buffer.from(ripple_address_codec_1.decodeAccountID(address)).toString('hex');
};
const currencyToHex = (currency) => {
    if (currency.length === 3) {
        const bytes = new Array(20 + 1).join('0').split('').map(parseFloat);
        bytes[12] = currency.charCodeAt(0) & 0xff;
        bytes[13] = currency.charCodeAt(1) & 0xff;
        bytes[14] = currency.charCodeAt(2) & 0xff;
        return bytesToHex(bytes);
    }
    return currency;
};
const addLengthPrefix = (hex) => {
    const length = hex.length / 2;
    if (length <= 192) {
        return bytesToHex([length]) + hex;
    }
    else if (length <= 12480) {
        const x = length - 193;
        return bytesToHex([193 + (x >>> 8), x & 0xff]) + hex;
    }
    else if (length <= 918744) {
        const x = length - 12481;
        return bytesToHex([241 + (x >>> 16), (x >>> 8) & 0xff, x & 0xff]) + hex;
    }
    throw new Error('Variable integer overflow.');
};
exports.computeBinaryTransactionHash = (txBlobHex) => {
    const prefix = hash_prefix_1.default.TRANSACTION_ID.toString(16).toUpperCase();
    return sha512Half_1.default(prefix + txBlobHex);
};
exports.computeTransactionHash = (txJSON) => {
    return exports.computeBinaryTransactionHash(ripple_binary_codec_1.encode(txJSON));
};
exports.computeBinaryTransactionSigningHash = (txBlobHex) => {
    const prefix = hash_prefix_1.default.TRANSACTION_SIGN.toString(16).toUpperCase();
    return sha512Half_1.default(prefix + txBlobHex);
};
exports.computeAccountLedgerObjectID = (address) => {
    return sha512Half_1.default(ledgerSpaceHex('account') + addressToHex(address));
};
exports.computeSignerListLedgerObjectID = (address) => {
    return sha512Half_1.default(ledgerSpaceHex('signerList') + addressToHex(address) + '00000000');
};
exports.computeOrderID = (address, sequence) => {
    const prefix = '00' + intToHex(ledgerspaces_1.default.offer.charCodeAt(0), 1);
    return sha512Half_1.default(prefix + addressToHex(address) + intToHex(sequence, 4));
};
exports.computeTrustlineHash = (address1, address2, currency) => {
    const address1Hex = addressToHex(address1);
    const address2Hex = addressToHex(address2);
    const swap = new bignumber_js_1.default(address1Hex, 16).isGreaterThan(new bignumber_js_1.default(address2Hex, 16));
    const lowAddressHex = swap ? address2Hex : address1Hex;
    const highAddressHex = swap ? address1Hex : address2Hex;
    const prefix = ledgerSpaceHex('rippleState');
    return sha512Half_1.default(prefix + lowAddressHex + highAddressHex + currencyToHex(currency));
};
exports.computeTransactionTreeHash = (transactions) => {
    const shamap = new shamap_1.SHAMap();
    transactions.forEach((txJSON) => {
        const txBlobHex = ripple_binary_codec_1.encode(txJSON);
        const metaHex = ripple_binary_codec_1.encode(txJSON.metaData);
        const txHash = exports.computeBinaryTransactionHash(txBlobHex);
        const data = addLengthPrefix(txBlobHex) + addLengthPrefix(metaHex);
        shamap.addItem(txHash, data, shamap_1.NodeType.TRANSACTION_METADATA);
    });
    return shamap.hash;
};
exports.computeStateTreeHash = (entries) => {
    const shamap = new shamap_1.SHAMap();
    entries.forEach((ledgerEntry) => {
        const data = ripple_binary_codec_1.encode(ledgerEntry);
        shamap.addItem(ledgerEntry.index, data, shamap_1.NodeType.ACCOUNT_STATE);
    });
    return shamap.hash;
};
exports.computeLedgerHash = (ledgerHeader) => {
    const prefix = hash_prefix_1.default.LEDGER.toString(16).toUpperCase();
    return sha512Half_1.default(prefix +
        intToHex(ledgerHeader.ledger_index, 4) +
        bigintToHex(ledgerHeader.total_coins, 8) +
        ledgerHeader.parent_hash +
        ledgerHeader.transaction_hash +
        ledgerHeader.account_hash +
        intToHex(ledgerHeader.parent_close_time, 4) +
        intToHex(ledgerHeader.close_time, 4) +
        intToHex(ledgerHeader.close_time_resolution, 1) +
        intToHex(ledgerHeader.close_flags, 1));
};
exports.computeEscrowHash = (address, sequence) => {
    return sha512Half_1.default(ledgerSpaceHex('escrow') + addressToHex(address) + intToHex(sequence, 4));
};
exports.computePaymentChannelHash = (address, dstAddress, sequence) => {
    return sha512Half_1.default(ledgerSpaceHex('paychan') +
        addressToHex(address) +
        addressToHex(dstAddress) +
        intToHex(sequence, 4));
};
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