MerkleTree计算根节点不相等

[missop]

const tree = new MerkleTree(64);
  const root = tree.getRoot();
  tree.setLeaf(1n,Poseidon.hash([Field(1)]))
  const witness = new MerkleTreeWitness(tree.getWitness(1n));
  console.log("witness.calculateRoot(Poseidon.hash([Field(1)]))",witness.calculateRoot(Poseidon.hash([Field(1)])),root);

witness.calculateRoot(Poseidon.hash([Field(1)])),root两者为什么不相等呢

[zilong-dai]

先 setLeaf, 再 getRoot. 下面的代码是相等的.

    const tree = new MerkleTree(4);
    // ith leaf => Filed(i)
    for (let i = 0; i < 4; i++) {
      tree.setLeaf(BigInt(i), Field(i));
    }

    const expectRoot = tree.getRoot();

    const witness = new (MerkleWitness(4))(tree.getWitness(0n));

    const calculatedRoot = witness.calculateRoot(Field(0));

    console.log('root:', calculatedRoot.toBigInt(), expectRoot.toBigInt());

[coldstar1993]

用法错了。正确的如下：
const tree = new MerkleTree(64);
const root = tree.getRoot();
const witness = new MerkleTreeWitness(tree.getWitness(1n));

tree.setLeaf(1n,Poseidon.hash([Field(1)]));
const root1 = tree.getRoot();
console.log("witness.calculateRoot(Poseidon.hash([Field(1)]))",witness.calculateRoot(Poseidon.hash([Field(1)])), root1 );