79 lines
2.2 KiB
TypeScript
79 lines
2.2 KiB
TypeScript
import { Payment, PaymentOpts } from './index' // eslint-disable-line
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import * as bscript from '../script'
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import * as lazy from './lazy'
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import { bitcoin as BITCOIN_NETWORK } from '../networks'
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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 (
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!a.input &&
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!a.output &&
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!a.pubkey &&
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!a.input &&
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!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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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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}, a)
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const _chunks = <()=>Array<Buffer | number>>lazy.value(function () { return bscript.decompile(a.input!) })
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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', function () {
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if (!a.pubkey) return
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return bscript.compile([
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a.pubkey,
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OPS.OP_CHECKSIG
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])
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})
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lazy.prop(o, 'pubkey', function () {
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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', function () {
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if (!a.input) return
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return <Buffer>_chunks()[0]
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})
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lazy.prop(o, 'input', function () {
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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', function () {
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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) throw new TypeError('Output is invalid')
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if (!ecc.isPoint(o.pubkey)) throw new TypeError('Output pubkey is invalid')
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if (a.pubkey && !a.pubkey.equals(o.pubkey!)) 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!)) 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!)) 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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