@airgap/crypto/utils/bytes.js

The @airgap/crypto packages provides common crypto functionalities.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.bytesDecodeNode = exports.bytesEncodeNode = void 0;
var factory_1 = require("./factory");
function bytesEncodeNode(node) {
    return {
        type: 'bytes',
        secretKey: encodeKey(node, 'secretKey'),
        publicKey: encodeKey(node, 'publicKey')
    };
}
exports.bytesEncodeNode = bytesEncodeNode;
function encodeKey(node, keyType) {
    var depth = Buffer.alloc(1);
    depth.writeUInt8(node.depth);
    var parentFingerprint = Buffer.alloc(4);
    parentFingerprint.writeUInt32BE(node.parentFingerprint);
    var index = Buffer.alloc(4);
    index.writeUInt32BE(node.index);
    var chainCode = node.chainCode;
    var key = node[keyType];
    return Buffer.concat([depth, parentFingerprint, index, chainCode, key]);
}
function bytesDecodeNode(node) {
    var xprvDecoded = decodeKey(node.secretKey);
    var xpubDecoded = decodeKey(node.publicKey);
    return (0, factory_1.newDerivationNodeFromKeys)(xprvDecoded, xpubDecoded);
}
exports.bytesDecodeNode = bytesDecodeNode;
function decodeKey(buffer) {
    var depth = buffer.readUInt8(0);
    var parentFingerprint = buffer.readUInt32BE(1);
    var index = buffer.readUInt32BE(5);
    var chainCode = buffer.slice(9, 41);
    var key = buffer.slice(41);
    return {
        depth: depth,
        parentFingerprint: parentFingerprint,
        index: index,
        chainCode: chainCode,
        key: key
    };
}
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