Example Node script for Decoding/Encoding the keychain

keychain.js

// Decode the AES key
// Example: Ced0+UTeTBbDhnHM9mLTk5qxlz3YZK6dEn1U+NTxOko=
// Output: 09e774f944de4c16c38671ccf662d3939ab1973dd864ae9d127d54f8d4f13a4a
function decode(string) {
    return Buffer.from(string, 'base64').toString('hex')
}

// Encode the AES key (without 0x) for the keychain
// Example: 581D53157B01D82CB0CDBD7A859D8774173C5F516C4D5AB3943C21C893BC3DC7
// Output: WB1TFXsB2Cywzb16hZ2HdBc8X1FsTVqzlDwhyJO8Pcc=
function encode(key) {
    return Buffer.from(key, 'hex').toString('base64')
}