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RCL Accounts (draft done)

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This commit is contained in:
mDuo13
2017-04-26 18:24:17 -07:00
parent 3b0ffa0712
commit 0a221e2c99
38 changed files with 694 additions and 173 deletions
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67
content/code_samples/address_encoding/encode_address.js
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@@ -7,44 +7,39 @@ const base58 = require('base-x')(R_B58_DICT);
assert(crypto.getHashes().includes('sha256'));
assert(crypto.getHashes().includes('ripemd160'));
function checksum_of(payload_buf) {
const hash_1 = crypto.createHash('sha256').update(payload_buf).digest();
const hash_2 = crypto.createHash('sha256').update(hash_1).digest();
return hash_2.slice(0,4);
}
// Start with a public key. secp256k1 keys should be 33 bytes;
// Ed25519 keys should be 32 bytes prefixed with 0xED (a total of 33 bytes).
function address_of(pubkey_hex, key_type='secp256k1') {
const pubkey_buf = Buffer.from(pubkey_hex, 'hex');
// Ed25519 key:
const pubkey_hex =
'ED9434799226374926EDA3B54B1B461B4ABF7237962EAE18528FEA67595397FA32';
//// secp256k1 key:
// const pubkey_hex =
// '0303E20EC6B4A39A629815AE02C0A1393B9225E3B890CAE45B59F42FA29BE9668D';
if (key_type.toLowerCase() == 'secp256k1') {
assert(pubkey_buf.length == 33);
} else if (key_type.toLowerCase() == 'ed25519') {
assert(pubkey_buf.length == 32);
} else {
throw 'UnknownKeyType';
}
const pubkey = Buffer.from(pubkey_hex, 'hex');
assert(pubkey.length == 33);
const pubkey_inner_hash = crypto.createHash('sha256');
// Calculate the RIPEMD160 hash of the SHA-256 hash of the public key
// This is the "Account ID"
const pubkey_inner_hash = crypto.createHash('sha256').update(pubkey);
const pubkey_outer_hash = crypto.createHash('ripemd160');
pubkey_outer_hash.update(pubkey_inner_hash.digest());
const account_id = pubkey_outer_hash.digest();
// Ed25519 keys are prefixed with 0xED to make them 33 bytes
if (key_type.toLowerCase() == 'ed25519') {
pubkey_inner_hash.update(Buffer.from([0xED]));
}
// Prefix the Account ID with the type prefix for "Ripple Address", then
// calculate a checksum as the first 4 bytes of the SHA-256 of the SHA-256
// of the Account ID
const address_type_prefix = Buffer.from([0x00]);
const payload = Buffer.concat([address_type_prefix, account_id]);
const chksum_hash1 = crypto.createHash('sha256').update(payload).digest();
const chksum_hash2 = crypto.createHash('sha256').update(chksum_hash1).digest();
const checksum = chksum_hash2.slice(0,4);
pubkey_inner_hash.update(pubkey_buf);
const pubkey_outer_hash = crypto.createHash('ripemd160');
pubkey_outer_hash.update(pubkey_inner_hash.digest());
const addressTypePrefix = Buffer.from([0x00]);
const accountID = pubkey_outer_hash.digest();
const checksum = checksum_of(accountID);
const dataToEncode = Buffer.concat([addressTypePrefix, accountID, checksum]);
return base58.encode(dataToEncode);
}
console.log(
address_of('0330E7FC9D56BB25D6893BA3F317AE5BCF33B3291BD63DB32654A313222F7FD020')
);
// rHb9CJAWyB4rj91VRWn96DkukG4bwdtyTh
// Concatenate the address type prefix, the payload, and the checksum.
// Base-58 encode the encoded value to get the address.
const dataToEncode = Buffer.concat([payload, checksum]);
const address = base58.encode(dataToEncode);
console.log(address);
// rnBFvgZphmN39GWzUJeUitaP22Fr9be75H (secp256k1 example)
// rDTXLQ7ZKZVKz33zJbHjgVShjsBnqMBhmN (Ed25519 example)