@arkade-os/sdk
Version:
Bitcoin wallet SDK with Taproot and Ark integration
65 lines (64 loc) • 1.98 kB
JavaScript
import { pubSchnorr, randomPrivateKeyBytes } from "@scure/btc-signer/utils";
import { hex } from "@scure/base";
import { SigHash } from "@scure/btc-signer";
import { TreeSignerSession } from '../tree/signingSession.js';
const ZERO_32 = new Uint8Array(32).fill(0);
const ALL_SIGHASH = Object.values(SigHash).filter((x) => typeof x === "number");
/**
* In-memory single key implementation for Bitcoin transaction signing.
*
* @example
* ```typescript
* // Create from hex string
* const key = SingleKey.fromHex('your_private_key_hex');
*
* // Create from raw bytes
* const key = SingleKey.fromPrivateKey(privateKeyBytes);
*
* // Sign a transaction
* const signedTx = await key.sign(transaction);
* ```
*/
export class SingleKey {
constructor(key) {
this.key = key || randomPrivateKeyBytes();
}
static fromPrivateKey(privateKey) {
return new SingleKey(privateKey);
}
static fromHex(privateKeyHex) {
return new SingleKey(hex.decode(privateKeyHex));
}
async sign(tx, inputIndexes) {
const txCpy = tx.clone();
if (!inputIndexes) {
try {
if (!txCpy.sign(this.key, ALL_SIGHASH, ZERO_32)) {
throw new Error("Failed to sign transaction");
}
}
catch (e) {
if (e instanceof Error &&
e.message.includes("No inputs signed")) {
// ignore
}
else {
throw e;
}
}
return txCpy;
}
for (const inputIndex of inputIndexes) {
if (!txCpy.signIdx(this.key, inputIndex, ALL_SIGHASH, ZERO_32)) {
throw new Error(`Failed to sign input #${inputIndex}`);
}
}
return txCpy;
}
xOnlyPublicKey() {
return pubSchnorr(this.key);
}
signerSession() {
return TreeSignerSession.random();
}
}