function packAddress(derivationPath, xpub, hdPassphrase, derivationScheme) {
validateBuffer(xpub, 64)
validateDerivationScheme(derivationScheme)
if (derivationScheme === 1) {
validateArray(derivationPath)
validateBuffer(hdPassphrase, 32)
}
let addressPayload, addressAttributes
if (derivationScheme === 1 && derivationPath.length > 0) {
addressPayload = encryptDerivationPath(derivationPath, hdPassphrase)
addressAttributes = new Map([[1, cbor.encode(addressPayload)]])
} else {
addressPayload = Buffer.from([])
addressAttributes = new Map()
}
const addressRoot = getAddressHash([
0,
[0, xpub],
addressPayload.length > 0 ? new Map([[1, cbor.encode(addressPayload)]]) : new Map(),
])
const addressType = 0 // Public key address
const addressData = [addressRoot, addressAttributes, addressType]
const addressDataEncoded = cbor.encode(addressData)
return base58.encode(
cbor.encode([new cbor.Tagged(24, addressDataEncoded), crc32(addressDataEncoded)])
)
}
function encryptDerivationPath(derivationPath, hdPassphrase) {
const serializedDerivationPath = cbor.encode(new CborIndefiniteLengthArray(derivationPath))
return chacha20poly1305Encrypt(
serializedDerivationPath,
hdPassphrase,
Buffer.from('serokellfore')
)
}
function getAddressHash(input) {
// eslint-disable-next-line camelcase
const firstHash = sha3_256(cbor.encode(input))
return blake2b(firstHash, 28)
}