ARCHIVE/xahau.js
1
0
Fork 0
mirror of https://github.com/Xahau/xahau.js.git synced 2025-11-22 05:05:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

Expose Base58 functionality in API.

Browse Source
This commit is contained in:
Stefan Thomas
2013-06-24 13:47:55 +02:00
parent be78db1563
commit 7cb9787424
2 changed files with 29 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/js/ripple/base.js
View File

@@ -64,6 +64,8 @@ Base.encode = function (input, alpha) {
// --> input: String
// <-- array of bytes or undefined.
Base.decode = function (input, alpha) {
if ("string" !== typeof input) return undefined;
var alphabet = alphabets[alpha || 'ripple'];
var bi_base = new BigInteger(String(alphabet.length));
var bi_value = nbi();
@@ -105,6 +107,17 @@ Base.decode = function (input, alpha) {
return [].concat(utils.arraySet(zeros, 0), bytes);
};
Base.verify_checksum = function (bytes) {
var computed = sha256hash(bytes.slice(0, -4)).slice(0, 4);
var checksum = bytes.slice(-4);
for (var i = 0; i < 4; i++)
if (computed[i] !== checksum[i])
return false;
return true;
};
// --> input: Array
// <-- String
Base.encode_check = function (version, input, alphabet) {
@@ -119,15 +132,23 @@ Base.encode_check = function (version, input, alphabet) {
Base.decode_check = function (version, input, alphabet) {
var buffer = Base.decode(input, alphabet);
if (!buffer || buffer[0] !== version || buffer.length < 5)
if (!buffer || buffer.length < 5)
return NaN;
var computed = sha256hash(buffer.slice(0, -4)).slice(0, 4);
var checksum = buffer.slice(-4);
var i;
// Single valid version
if ("number" === typeof version && buffer[0] !== version)
return NaN;
for (i = 0; i != 4; i += 1)
if (computed[i] !== checksum[i])
// Multiple allowed versions
if ("object" === typeof version && Array.isArray(version)) {
var match = false;
for (var i = 0, l = version.length; i < l; i++) {
match |= version[i] === buffer[0];
}
if (!match) return NaN;
}
if (!Base.verify_checksum(buffer))
return NaN;
// We'll use the version byte to add a leading zero, this ensures JSBN doesn't

1
src/js/ripple/index.js
View File

@@ -1,6 +1,7 @@
exports.Remote = require('./remote').Remote;
exports.Amount = require('./amount').Amount;
exports.Currency = require('./currency').Currency;
exports.Base = require('./base').Base;
exports.UInt160 = require('./amount').UInt160;
exports.Seed = require('./amount').Seed;
exports.Transaction = require('./transaction').Transaction;