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Tools.js
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Tools.js
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const SHA256 = require('crypto-js/sha256');
const MerkleTree = require('merkletreejs');
class Tools {
static createTimestamp() {
return (new Date()).getTime();
}
static SHA256WithBuffer(data) {
const dataAsString = Tools.bufferToString(data);
const hashedString = SHA256(dataAsString).toString();
return Tools.stringToBuffer(hashedString);
};
static bufferToString(data) {
return data.toString('utf8');
};
static stringToBuffer(data) {
return Buffer.from(data, 'utf8');
};
static computeMerkleRootHash(arrayOfHashes) {
const leavesAsBuffer = arrayOfHashes.map(Tools.stringToBuffer);
const tree = new MerkleTree(leavesAsBuffer, Tools.SHA256WithBuffer, {
isBitcoinTree: true
});
return tree.getRoot().toString('utf8');
}
}
module.exports = {
Tools
};