80 lines
2.3 KiB
TypeScript
80 lines
2.3 KiB
TypeScript
import { bitcoin as BITCOIN_NETWORK } from '../networks';
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import * as bscript from '../script';
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import { Payment, PaymentOpts, StackFunction } from './index';
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import * as lazy from './lazy';
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const typef = require('typeforce');
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const OPS = bscript.OPS;
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const ecc = require('tiny-secp256k1');
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// input: {signature}
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// output: {pubKey} OP_CHECKSIG
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export function p2pk(a: Payment, opts?: PaymentOpts): Payment {
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if (!a.input && !a.output && !a.pubkey && !a.input && !a.signature)
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throw new TypeError('Not enough data');
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opts = Object.assign({ validate: true }, opts || {});
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typef(
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{
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network: typef.maybe(typef.Object),
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output: typef.maybe(typef.Buffer),
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pubkey: typef.maybe(ecc.isPoint),
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signature: typef.maybe(bscript.isCanonicalScriptSignature),
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input: typef.maybe(typef.Buffer),
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},
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a,
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);
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const _chunks = lazy.value(() => {
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return bscript.decompile(a.input!);
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}) as StackFunction;
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const network = a.network || BITCOIN_NETWORK;
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const o: Payment = { network };
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lazy.prop(o, 'output', () => {
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if (!a.pubkey) return;
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return bscript.compile([a.pubkey, OPS.OP_CHECKSIG]);
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});
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lazy.prop(o, 'pubkey', () => {
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if (!a.output) return;
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return a.output.slice(1, -1);
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});
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lazy.prop(o, 'signature', () => {
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if (!a.input) return;
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return _chunks()[0] as Buffer;
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});
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lazy.prop(o, 'input', () => {
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if (!a.signature) return;
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return bscript.compile([a.signature]);
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});
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lazy.prop(o, 'witness', () => {
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if (!o.input) return;
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return [];
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});
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// extended validation
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if (opts.validate) {
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if (a.output) {
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if (a.output[a.output.length - 1] !== OPS.OP_CHECKSIG)
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throw new TypeError('Output is invalid');
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if (!ecc.isPoint(o.pubkey))
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throw new TypeError('Output pubkey is invalid');
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if (a.pubkey && !a.pubkey.equals(o.pubkey!))
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throw new TypeError('Pubkey mismatch');
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}
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if (a.signature) {
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if (a.input && !a.input.equals(o.input!))
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throw new TypeError('Signature mismatch');
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}
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if (a.input) {
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if (_chunks().length !== 1) throw new TypeError('Input is invalid');
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if (!bscript.isCanonicalScriptSignature(o.signature!))
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throw new TypeError('Input has invalid signature');
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}
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}
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return Object.assign(o, a);
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}
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