function getBackupPublicKey(contents) {
try {
return PublicKey.fromBuffer(contents.slice(0, 33))
} catch(e) {
console.error(e, e.stack)
}
}
return new Promise( resolve => {
var public_key = PublicKey.fromPublicKeyString(backup_pubkey)
var onetime_private_key = key.get_random_key(entropy)
var walletString = JSON.stringify(wallet_object, null, 0)
compress(walletString, compression_mode, compressedWalletBytes => {
var backup_buffer =
Aes.encrypt_with_checksum(onetime_private_key, public_key,
null/*nonce*/, compressedWalletBytes)
var onetime_public_key = onetime_private_key.toPublicKey()
var backup = Buffer.concat([ onetime_public_key.toBuffer(), backup_buffer ])
resolve(backup)
})
})
]).then(accounts => {
let myPublicKey = accounts[0].options.memo_key;
let myPrivateKey = WalletDb.getPrivateKey(myPublicKey);
if (!myPrivateKey) {
throw "Wallet does not have private memo key for " + myAccountNameOrId
}
let otherPublicKey = PublicKey.fromStringOrThrow(accounts[1].options.memo_key);
console.log(myPrivateKey.toWif(), accounts[1].options.memo_key);
let secret = myPrivateKey.get_shared_secret(otherPublicKey);
secret = secret.reduce((prev, current) => {
return prev + ('0' + current.toString(16)).substr(-2);
}, '');
return secret;
});
return new Promise( (resolve, reject) => {
if( ! Buffer.isBuffer(backup_buffer))
backup_buffer = new Buffer(backup_buffer, 'binary')
var private_key = PrivateKey.fromWif(backup_wif)
var public_key
try {
public_key = PublicKey.fromBuffer(backup_buffer.slice(0, 33))
} catch(e) {
console.error(e, e.stack)
throw new Error("Invalid backup file")
}
backup_buffer = backup_buffer.slice(33)
try {
backup_buffer = Aes.decrypt_with_checksum(
private_key, public_key, null/*nonce*/, backup_buffer)
} catch(error) {
console.error("Error decrypting wallet", error, error.stack)
reject("invalid_decryption_key")
return
}
try {
decompress(backup_buffer, wallet_string => {
try {
var wallet_object = JSON.parse(wallet_string)
resolve(wallet_object)
} catch(error) {
if( ! wallet_string) wallet_string = ""
console.error("Error parsing wallet json",
wallet_string.substring(0,10)+ "...")
reject("Error parsing wallet json")
}
})
} catch(error) {
console.error("Error decompressing wallet", error, error.stack)
reject("Error decompressing wallet")
return
}
})