57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
|
|
// taken from https://github.com/crypto-browserify/buffer-reverse/blob/master/inplace.js
|
|
function reverseInplace (buffer) {
|
|
for (var i = 0, j = buffer.length - 1; i < j; ++i, --j) {
|
|
var t = buffer[j];
|
|
|
|
buffer[j] = buffer[i];
|
|
buffer[i] = t;
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
function ripemd160 (bytearray) {
|
|
const crypto = require('crypto');
|
|
|
|
const secret = 'abcdefg';
|
|
const hash = crypto.createHash('ripemd160', secret)
|
|
.update(bytearray, 'binary', 'binary')
|
|
.digest();
|
|
return hash;
|
|
}
|
|
|
|
function sha256 (bytearray) {
|
|
const crypto = require('crypto');
|
|
|
|
const secret = 'abcdefg';
|
|
const hash = crypto.createHash('sha256', secret)
|
|
.update(bytearray, 'binary', 'binary')
|
|
.digest();
|
|
return hash;
|
|
}
|
|
|
|
export function OutpointToClaimId (outpointstr) {
|
|
var outpointsplit = outpointstr.split(':');
|
|
var outpoint = {txid: outpointsplit[0], vout: outpointsplit[1]};
|
|
// Assuming endianess is LittleEndian - Javacsript endianess depends on hardware.
|
|
// Can check with os.endianness(). Possible values are "BE" or "LE" as of Node.js v0.10.0
|
|
// convert txid to byte array then reverse bytes to get BigEndian
|
|
var txidbytes = Buffer.from(outpoint.txid, 'hex');
|
|
var txidrevbytes = reverseInplace(txidbytes);
|
|
// Get big endian of vout(uint32)
|
|
var voutbytes = Buffer.allocUnsafe(4);
|
|
voutbytes.writeInt32BE(outpoint.vout);
|
|
// Merge arrays
|
|
var claimidbytes = Buffer.concat([txidrevbytes, voutbytes]);
|
|
// Hash - Sha256
|
|
claimidbytes = sha256(claimidbytes);
|
|
// Hash - RipeMD160
|
|
claimidbytes = ripemd160(claimidbytes);
|
|
// Return to little endian.
|
|
claimidbytes = reverseInplace(claimidbytes);
|
|
// Encode to hex string
|
|
var claimid = claimidbytes.toString('hex');
|
|
|
|
return claimid;
|
|
}
|