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lib v1.3.3: Improvements to bitjs for flo

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- Updated tx.addflodata: will now check if the data is valid or not
- Optimized tx.serialize: changed complex code for appending flodata to a simple one
- Added bitjs.strToBytes: converts string (ascii) to strToBytes
- Added bitjs.pubkeydecompress: decompresses the public key
- Added bitjs.verifySignature: verify the signature (of hash and pubkey)
This commit is contained in:
sairajzero 2023-02-19 17:26:24 +05:30
parent ca0d557d94
commit 7d31dec230
1 changed files with 46 additions and 32 deletions
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78
lib.js
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@ -1,4 +1,4 @@
(function (GLOBAL) { //lib v1.3.2
(function (GLOBAL) { //lib v1.3.3
'use strict';
/* Utility Libraries required for Standard operations
* All credits for these codes belong to their respective creators, moderators and owners.
@ -4349,15 +4349,6 @@
var bitjs = GLOBAL.bitjs = function () { };
function ascii_to_hexa(str) {
var arr1 = [];
for (var n = 0, l = str.length; n < l; n++) {
var hex = Number(str.charCodeAt(n)).toString(16);
arr1.push(hex);
}
return arr1.join('');
}
/* public vars */
bitjs.pub = 0x23; // flochange - changed the prefix to FLO Mainnet PublicKey Prefix 0x23
bitjs.priv = 0xa3; //flochange - changed the prefix to FLO Mainnet Private key prefix 0xa3
@ -4497,10 +4488,18 @@
return this.outputs.push(o);
}
// flochange - Added fn to assign flodata to tx
btrx.addflodata = function (data) {
//checks for valid flo-data string
if (typeof data !== "string")
throw Error("floData should be String");
if (data.length > 1040)
throw Error("floData Character Limit Exceeded");
if (bitjs.strToBytes(data).some(c => c < 32 || c > 127))
throw Error("floData contains Invalid characters (only ASCII characters allowed");
btrx.addflodata = function (txcomments) { // flochange - this whole function needs to be done
this.floData = txcomments;
return this.floData; //flochange .. returning the txcomments -- check if the function return will assign
this.floData = data;
return this.floData;
}
@ -4793,29 +4792,14 @@
}
buffer = buffer.concat(bitjs.numToBytes(parseInt(this.locktime), 4));
var flohex = ascii_to_hexa(this.floData);
var floDataCount = this.floData.length;
var floDataCountString;
//flochange -- creating unique data character count logic for floData. This string is prefixed before actual floData string in Raw Transaction
if (floDataCount < 16) {
floDataCountString = floDataCount.toString(16);
floDataCountString = "0" + floDataCountString;
} else if (floDataCount < 253) {
floDataCountString = floDataCount.toString(16);
} else if (floDataCount <= 1040) {
let floDataCountAdjusted = (floDataCount - 253) + parseInt("0xfd00fd");
let floDataCountStringAdjusted = floDataCountAdjusted.toString(16);
floDataCountString = floDataCountStringAdjusted.substr(0, 2) + floDataCountStringAdjusted.substr(4, 2) + floDataCountStringAdjusted.substr(2, 2);
} else {
floDataCountString = "Character Limit Exceeded";
}
//flochange -- append floData field
buffer = buffer.concat(bitjs.numToVarInt(this.floData.length));
buffer = buffer.concat(bitjs.strToBytes(this.floData))
return Crypto.util.bytesToHex(buffer) + floDataCountString + flohex; // flochange -- Addition of floDataCountString and floData in serialization
return Crypto.util.bytesToHex(buffer);
}
return btrx;
}
@ -4856,6 +4840,36 @@
else return bytes[0] + 256 * bitjs.bytesToNum(bytes.slice(1));
}
//flochange - adding fn to convert string (for flodata) to byte
bitjs.strToBytes = function (str) {
return str.split('').map(c => c.charCodeAt(0));
}
/* decompress an compressed public key */
bitjs.pubkeydecompress = function (pubkey) {
if ((typeof (pubkey) == 'string') && pubkey.match(/^[a-f0-9]+$/i)) {
var curve = EllipticCurve.getSECCurveByName("secp256k1");
try {
var pt = curve.curve.decodePointHex(pubkey);
var x = pt.getX().toBigInteger();
var y = pt.getY().toBigInteger();
var publicKeyBytes = EllipticCurve.integerToBytes(x, 32);
publicKeyBytes = publicKeyBytes.concat(EllipticCurve.integerToBytes(y, 32));
publicKeyBytes.unshift(0x04);
return Crypto.util.bytesToHex(publicKeyBytes);
} catch (e) {
// console.log(e);
return false;
}
}
return false;
}
bitjs.verifySignature = function (hash, sig, pubkey) {
return Bitcoin.ECDSA.verify(hash, sig, pubkey);
}
/* clone an object */
bitjs.clone = function (obj) {
if (obj == null || typeof (obj) != 'object') return obj;