/src/address.js
JavaScript | 140 lines | 138 code | 0 blank | 2 comment | 25 complexity | c743c2587c16bd66e7b3723d0e0caec5 MD5 | raw file
- 'use strict';
- Object.defineProperty(exports, '__esModule', { value: true });
- exports.toOutputScript = exports.fromOutputScript = exports.toBech32 = exports.toBase58Check = exports.fromBech32 = exports.fromBase58Check = void 0;
- const networks = require('./networks');
- const payments = require('./payments');
- const bscript = require('./script');
- const types = require('./types');
- const bech32_1 = require('bech32');
- const bs58check = require('bs58check');
- const { typeforce } = types;
- const FUTURE_SEGWIT_MAX_SIZE = 40;
- const FUTURE_SEGWIT_MIN_SIZE = 2;
- const FUTURE_SEGWIT_MAX_VERSION = 16;
- const FUTURE_SEGWIT_MIN_VERSION = 1;
- const FUTURE_SEGWIT_VERSION_DIFF = 0x50;
- function _toFutureSegwitAddress(output, network) {
- const data = output.slice(2);
- if (
- data.length < FUTURE_SEGWIT_MIN_SIZE ||
- data.length > FUTURE_SEGWIT_MAX_SIZE
- )
- throw new TypeError('Invalid program length for segwit address');
- const version = output[0] - FUTURE_SEGWIT_VERSION_DIFF;
- if (
- version < FUTURE_SEGWIT_MIN_VERSION ||
- version > FUTURE_SEGWIT_MAX_VERSION
- )
- throw new TypeError('Invalid version for segwit address');
- if (output[1] !== data.length)
- throw new TypeError('Invalid script for segwit address');
- return toBech32(data, version, network.bech32);
- }
- function fromBase58Check(address) {
- const payload = bs58check.decode(address);
- // TODO: 4.0.0, move to "toOutputScript"
- if (payload.length < 21) throw new TypeError(address + ' is too short');
- if (payload.length > 21) throw new TypeError(address + ' is too long');
- const version = payload.readUInt8(0);
- const hash = payload.slice(1);
- return { version, hash };
- }
- exports.fromBase58Check = fromBase58Check;
- function fromBech32(address) {
- let result;
- let version;
- try {
- result = bech32_1.bech32.decode(address);
- } catch (e) {}
- if (result) {
- version = result.words[0];
- if (version !== 0) throw new TypeError(address + ' uses wrong encoding');
- } else {
- result = bech32_1.bech32m.decode(address);
- version = result.words[0];
- if (version === 0) throw new TypeError(address + ' uses wrong encoding');
- }
- const data = bech32_1.bech32.fromWords(result.words.slice(1));
- return {
- version,
- prefix: result.prefix,
- data: Buffer.from(data),
- };
- }
- exports.fromBech32 = fromBech32;
- function toBase58Check(hash, version) {
- typeforce(types.tuple(types.Hash160bit, types.UInt8), arguments);
- const payload = Buffer.allocUnsafe(21);
- payload.writeUInt8(version, 0);
- hash.copy(payload, 1);
- return bs58check.encode(payload);
- }
- exports.toBase58Check = toBase58Check;
- function toBech32(data, version, prefix) {
- const words = bech32_1.bech32.toWords(data);
- words.unshift(version);
- return version === 0
- ? bech32_1.bech32.encode(prefix, words)
- : bech32_1.bech32m.encode(prefix, words);
- }
- exports.toBech32 = toBech32;
- function fromOutputScript(output, network) {
- // TODO: Network
- network = network || networks.bitcoin;
- try {
- return payments.p2pkh({ output, network }).address;
- } catch (e) {}
- try {
- return payments.p2sh({ output, network }).address;
- } catch (e) {}
- try {
- return payments.p2wpkh({ output, network }).address;
- } catch (e) {}
- try {
- return payments.p2wsh({ output, network }).address;
- } catch (e) {}
- try {
- return _toFutureSegwitAddress(output, network);
- } catch (e) {}
- throw new Error(bscript.toASM(output) + ' has no matching Address');
- }
- exports.fromOutputScript = fromOutputScript;
- function toOutputScript(address, network) {
- network = network || networks.bitcoin;
- let decodeBase58;
- let decodeBech32;
- try {
- decodeBase58 = fromBase58Check(address);
- } catch (e) {}
- if (decodeBase58) {
- if (decodeBase58.version === network.pubKeyHash)
- return payments.p2pkh({ hash: decodeBase58.hash }).output;
- if (decodeBase58.version === network.scriptHash)
- return payments.p2sh({ hash: decodeBase58.hash }).output;
- } else {
- try {
- decodeBech32 = fromBech32(address);
- } catch (e) {}
- if (decodeBech32) {
- if (decodeBech32.prefix !== network.bech32)
- throw new Error(address + ' has an invalid prefix');
- if (decodeBech32.version === 0) {
- if (decodeBech32.data.length === 20)
- return payments.p2wpkh({ hash: decodeBech32.data }).output;
- if (decodeBech32.data.length === 32)
- return payments.p2wsh({ hash: decodeBech32.data }).output;
- } else if (
- decodeBech32.version >= FUTURE_SEGWIT_MIN_VERSION &&
- decodeBech32.version <= FUTURE_SEGWIT_MAX_VERSION &&
- decodeBech32.data.length >= FUTURE_SEGWIT_MIN_SIZE &&
- decodeBech32.data.length <= FUTURE_SEGWIT_MAX_SIZE
- )
- return bscript.compile([
- decodeBech32.version + FUTURE_SEGWIT_VERSION_DIFF,
- decodeBech32.data,
- ]);
- }
- }
- throw new Error(address + ' has no matching Script');
- }
- exports.toOutputScript = toOutputScript;