@vbyte/btc-dev/dist/lib/taproot/encode.js

Batteries-included toolset for plebian bitcoin development

import { hash340 } from '@vbyte/micro-lib/hash';
import { Assert } from '@vbyte/micro-lib';
import { prefix_script_size } from '../../lib/script/index.js';
import { TAPLEAF_DEFAULT_VERSION } from '../../const.js';
const DEFAULT_VERSION = TAPLEAF_DEFAULT_VERSION;
export function encode_tapscript(script, version = DEFAULT_VERSION) {
    const preimg = prefix_script_size(script);
    return encode_tapleaf(preimg, version);
}
export function encode_tapleaf(data, version = DEFAULT_VERSION) {
    const vbyte = encode_leaf_version(version);
    return hash340('TapLeaf', vbyte, data);
}
export function encode_tapbranch(leaf_a, leaf_b) {
    if (leaf_b < leaf_a) {
        [leaf_a, leaf_b] = [leaf_b, leaf_a];
    }
    return hash340('TapBranch', leaf_a, leaf_b);
}
export function encode_leaf_version(version = 0xc0) {
    return version & 0xfe;
}
export function encode_taptweak(pubkey, data = new Uint8Array()) {
    Assert.size(pubkey, 32);
    return hash340('TapTweak', pubkey, data);
}