120 lines
3.3 KiB
TypeScript
120 lines
3.3 KiB
TypeScript
import { Network } from './networks';
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import * as networks from './networks';
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import * as payments from './payments';
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import * as bscript from './script';
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import * as types from './types';
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const bech32 = require('bech32');
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const bs58check = require('bs58check');
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const typeforce = require('typeforce');
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export interface Base58CheckResult {
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hash: Buffer;
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version: number;
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}
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export interface Bech32Result {
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version: number;
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prefix: string;
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data: Buffer;
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}
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export function fromBase58Check(address: string): Base58CheckResult {
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const payload = bs58check.decode(address);
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// TODO: 4.0.0, move to "toOutputScript"
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if (payload.length < 21) throw new TypeError(address + ' is too short');
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if (payload.length > 21) throw new TypeError(address + ' is too long');
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const version = payload.readUInt8(0);
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const hash = payload.slice(1);
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return { version, hash };
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}
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export function fromBech32(address: string): Bech32Result {
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const result = bech32.decode(address);
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const data = bech32.fromWords(result.words.slice(1));
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return {
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version: result.words[0],
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prefix: result.prefix,
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data: Buffer.from(data),
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};
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}
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export function toBase58Check(hash: Buffer, version: number): string {
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typeforce(types.tuple(types.Hash160bit, types.UInt8), arguments);
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const payload = Buffer.allocUnsafe(21);
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payload.writeUInt8(version, 0);
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hash.copy(payload, 1);
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return bs58check.encode(payload);
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}
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export function toBech32(
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data: Buffer,
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version: number,
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prefix: string,
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): string {
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const words = bech32.toWords(data);
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words.unshift(version);
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return bech32.encode(prefix, words);
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}
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export function fromOutputScript(output: Buffer, network?: Network): string {
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// TODO: Network
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network = network || networks.bitcoin;
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try {
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return payments.p2pkh({ output, network }).address as string;
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} catch (e) {}
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try {
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return payments.p2sh({ output, network }).address as string;
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} catch (e) {}
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try {
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return payments.p2wpkh({ output, network }).address as string;
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} catch (e) {}
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try {
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return payments.p2wsh({ output, network }).address as string;
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} catch (e) {}
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throw new Error(bscript.toASM(output) + ' has no matching Address');
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}
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export function toOutputScript(address: string, network?: Network): Buffer {
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network = network || networks.bitcoin;
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let decodeBase58: Base58CheckResult | undefined;
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let decodeBech32: Bech32Result | undefined;
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try {
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decodeBase58 = fromBase58Check(address);
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} catch (e) {}
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if (decodeBase58) {
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if (decodeBase58.version === network.pubKeyHash)
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return payments.p2pkh({ hash: decodeBase58.hash }).output as Buffer;
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if (decodeBase58.version === network.scriptHash)
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return payments.p2sh({ hash: decodeBase58.hash }).output as Buffer;
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} else {
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try {
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decodeBech32 = fromBech32(address);
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} catch (e) {}
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if (decodeBech32) {
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if (decodeBech32.prefix !== network.bech32)
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throw new Error(address + ' has an invalid prefix');
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if (decodeBech32.version === 0) {
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if (decodeBech32.data.length === 20)
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return payments.p2wpkh({ hash: decodeBech32.data }).output as Buffer;
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if (decodeBech32.data.length === 32)
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return payments.p2wsh({ hash: decodeBech32.data }).output as Buffer;
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}
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}
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}
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throw new Error(address + ' has no matching Script');
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}
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