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Update lib_btc.js

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tripathyr 2022-09-20 19:02:58 +05:30 committed by GitHub
parent 974cf960fb
commit 448299c3c8
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 47 additions and 48 deletions
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95
lib_btc.js
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@ -2604,6 +2604,52 @@
return count;
}
//Five utility functions added for generating transaction hashes and verification of signatures
var coinjs.changeEndianness = (string) => {
const result = [];
let len = string.length - 2;
while (len >= 0) {
result.push(string.substr(len, 2));
len -= 2;
}
return result.join('');
}
coinjs.getTransactionHash = function (transaction_in_hex) {
var x1,x2,x3,x4,x5;
x1 = Crypto.util.hexToBytes(transaction_in_hex);
x2 = Crypto.SHA256(x1);
x3 = Crypto.util.hexToBytes(x2);
x4 = Crypto.SHA256(x3);
x5 = coinjs.changeEndianness(x4);
return x5;
}
coinjs.compressedToUncompressed = function (compressed) {
var t1,t2;
t1 = curve.curve.decodePointHex(compressed);
t2 = curve.curve.encodePointHex(t1);
return t2;
}
coinjs.uncompressedToCompressed = function (uncompressed) {
var t1,t2,t3;
t1 = uncompressed.charAt(uncompressed.length-1)
t2 = parseInt(t1,10);
//Check if the last digit is odd
if(t2 % 2 == 1) { t3 = "03";} else { t3 = "02" };
return t3+ uncompressed.substr(2,64);
}
coinjs.verifySignatureHex = function (hashHex,sigHex,pubHexCompressed){
var h1,s1,p1,p2;
h1 = Crypto.util.hexToBytes(hashHex);
s1 = Crypto.util.hexToBytes(sigHex);
p1 = coinjs.compressedToUncompressed(pubHexCompressed);
p2 = Crypto.util.hexToBytes(p1);
return coinjs.verifySignature(h1,s1,p2);
}
coinjs.random = function (length) {
var r = "";
var l = length || 25;
@ -2790,54 +2836,7 @@
bytes.unshift(version)
return coinjs.bech32_encode(hrp, bytes);
}
//Five utility functions added for generating transaction hashes and verification of signatures
var changeEndianness = (string) => {
const result = [];
let len = string.length - 2;
while (len >= 0) {
result.push(string.substr(len, 2));
len -= 2;
}
return result.join('');
}
function getTransactionHash(transaction_in_hex) {
var x1,x2,x3,x4,x5;
x1 = Crypto.util.hexToBytes(transaction_in_hex);
x2 = Crypto.SHA256(x1);
x3 = Crypto.util.hexToBytes(x2);
x4 = Crypto.SHA256(x3);
x5 = changeEndianness(x4);
return x5;
}
function compressedToUncompressed(compressed) {
var t1,t2;
t1 = curve.curve.decodePointHex(compressed);
t2 = curve.curve.encodePointHex(t1);
return t2;
}
function uncompressedToCompressed(uncompressed) {
var t1,t2,t3;
t1 = uncompressed.charAt(uncompressed.length-1)
t2 = parseInt(t1,10);
//Check if the last digit is odd
if(t2 % 2 == 1) { t3 = "03";} else { t3 = "02" };
return t3+ uncompressed.substr(2,64);
}
function verifySignatureHex(hashHex,sigHex,pubHexCompressed){
var h1,s1,p1,p2;
h1 = Crypto.util.hexToBytes(hashHex);
s1 = Crypto.util.hexToBytes(sigHex);
p1 = compressedToUncompressed(pubHexCompressed);
p2 = Crypto.util.hexToBytes(p1);
return coinjs.verifySignature(h1,s1,p2);
}
btc_api.getBalance = addr => new Promise((resolve, reject) => {
fetch_api(`get_address_balance/BTC/${addr}`)
.then(result => resolve(parseFloat(result.data.confirmed_balance)))