58 lines
1.6 KiB
TypeScript
58 lines
1.6 KiB
TypeScript
import { bitcoin as BITCOIN_NETWORK } from '../networks';
|
|
import * as bscript from '../script';
|
|
import { Payment, PaymentOpts, Stack } from './index';
|
|
import * as lazy from './lazy';
|
|
|
|
const typef = require('typeforce');
|
|
const OPS = bscript.OPS;
|
|
|
|
function stacksEqual(a: Buffer[], b: Buffer[]): boolean {
|
|
if (a.length !== b.length) return false;
|
|
|
|
return a.every((x, i) => {
|
|
return x.equals(b[i]);
|
|
});
|
|
}
|
|
|
|
// output: OP_RETURN ...
|
|
export function p2data(a: Payment, opts?: PaymentOpts): Payment {
|
|
if (!a.data && !a.output) throw new TypeError('Not enough data');
|
|
opts = Object.assign({ validate: true }, opts || {});
|
|
|
|
typef(
|
|
{
|
|
network: typef.maybe(typef.Object),
|
|
output: typef.maybe(typef.Buffer),
|
|
data: typef.maybe(typef.arrayOf(typef.Buffer)),
|
|
},
|
|
a,
|
|
);
|
|
|
|
const network = a.network || BITCOIN_NETWORK;
|
|
const o = { network } as Payment;
|
|
|
|
lazy.prop(o, 'output', () => {
|
|
if (!a.data) return;
|
|
return bscript.compile(([OPS.OP_RETURN] as Stack).concat(a.data));
|
|
});
|
|
lazy.prop(o, 'data', () => {
|
|
if (!a.output) return;
|
|
return bscript.decompile(a.output)!.slice(1);
|
|
});
|
|
|
|
// extended validation
|
|
if (opts.validate) {
|
|
if (a.output) {
|
|
const chunks = bscript.decompile(a.output);
|
|
if (chunks![0] !== OPS.OP_RETURN)
|
|
throw new TypeError('Output is invalid');
|
|
if (!chunks!.slice(1).every(typef.Buffer))
|
|
throw new TypeError('Output is invalid');
|
|
|
|
if (a.data && !stacksEqual(a.data, o.data as Buffer[]))
|
|
throw new TypeError('Data mismatch');
|
|
}
|
|
}
|
|
|
|
return Object.assign(o, a);
|
|
}
|