postchain-client
Version:
Client library for accessing a Postchain node through REST.
59 lines • 2.25 kB
JavaScript
;
var MerkleHashCalculator = require('../merklehashcalculator').MerkleHashCalculator;
var MerkleHashSummaryFactory = require('./merklehashsummaryfactory').MerkleHashSummaryFactory;
var BinaryTreeFactory = require('../binarytreefactory').BinaryTreeFactory;
var MerkleProofTreeFactory = require('./merkleprooftreefactory').MerkleProofTreeFactory;
var treeFactory = new BinaryTreeFactory();
var proofFactory = new MerkleProofTreeFactory();
var PathSet = require('../path').PathSet;
var MerkleProofTree = require('./merkleprooftree').MerkleProofTree;
/**
* Calculates the merkle root hash of the structure.
*
* @param {any} value
* @param {MerkleHashCalculator} calculator describes the method we use for hashing and serialization
* @return the merkle root hash (32 bytes) of the data structure.
*/
function merkleHash(value, calculator) {
return merkleHashSummary(value, calculator).merkleHash;
}
/**
*
* @param {MerkleProofTree} tree
* @param {MerkleHashCalculator} calculator
*/
function merkleTreeHash(tree, calculator) {
return merkleProofHashSummary(tree, calculator).merkleHash;
}
/**
* Calculates the merkle root hash of the structure
*
* @param {any} value
* @param {MerkleHashCalculator} calculator describes the method we use for hashing and serialization
* @return the merkle root hash summary
*/
function merkleHashSummary(value, calculator) {
var summaryFactory = new MerkleHashSummaryFactory(treeFactory, proofFactory);
return summaryFactory.calculateMerkleRoot(value, calculator);
}
/**
*
* @param {MerkleProofTree} tree
* @param {MerkleHashCalculator} calculator
*/
function merkleProofHashSummary(tree, calculator) {
var summaryFactory = new MerkleHashSummaryFactory(treeFactory, proofFactory);
return summaryFactory.calculateMerkleTreeRoot(tree, calculator);
}
/**
*
* @param {any} value
* @param {PathSet} pathSet
* @param {MerkleHashCalculator} calculator
*/
function generateProof(value, pathSet, calculator) {
var binaryTree = treeFactory.buildWithPath(value, pathSet);
return proofFactory.buildFromBinaryTree(binaryTree, calculator);
}
module.exports = { merkleHash, merkleTreeHash, merkleHashSummary, generateProof };
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