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