@bitgo-beta/utxo-ord
Version:
Utilities for building ordinals with BitGo utxo-lib
57 lines (56 loc) • 6.04 kB
JavaScript
;
/*
Functions for dealing with inscriptions.
See https://docs.ordinals.com/inscriptions.html
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createOutputScriptForInscription = void 0;
const assert = require("assert");
const utxo_lib_1 = require("@bitgo-beta/utxo-lib");
const OPS = utxo_lib_1.script.OPS;
const MAX_LENGTH_TAP_DATA_PUSH = 520;
/**
* The max size of an individual OP_PUSH in a Taproot script is 520 bytes. This
* function splits inscriptionData into an array buffer of 520 bytes length.
* https://docs.ordinals.com/inscriptions.html
* @param inscriptionData
* @param chunkSize
*/
function splitBuffer(inscriptionData, chunkSize) {
const pushDataBuffers = [];
for (let i = 0; i < inscriptionData.length; i += chunkSize) {
pushDataBuffers.push(inscriptionData.slice(i, i + chunkSize));
}
return pushDataBuffers;
}
/**
* @param userPubkey
* @param contentType
* @param inscriptionData
* @returns inscription address
*/
function createOutputScriptForInscription(userPubkey, contentType, inscriptionData) {
const dataPushBuffers = splitBuffer(inscriptionData, MAX_LENGTH_TAP_DATA_PUSH);
const uncompiledScript = [
userPubkey,
OPS.OP_CHECKSIG,
OPS.OP_FALSE,
OPS.OP_IF,
Buffer.from('ord', 'ascii'),
OPS.OP_1,
Buffer.from(contentType, 'ascii'),
OPS.OP_0,
...dataPushBuffers,
OPS.ENDIF,
];
const compiledScript = utxo_lib_1.script.compile(uncompiledScript);
const redeem = {
output: compiledScript,
depth: 0,
};
const payment = utxo_lib_1.p2trPayments.p2tr({ redeems: [redeem] }, { eccLib: utxo_lib_1.ecc });
assert(payment.output, 'Failed to create inscription output script');
return payment.output;
}
exports.createOutputScriptForInscription = createOutputScriptForInscription;
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