1.createTree.ts

// Create & test a Merkle tree hashed with Poseidon
// Coded with Starknet.js v6.0.0-beta.11 
// launch with npx ts-node src/scripts/merkleTree/airdropSJS6Sepolia/1.createTree.ts

import { Account, ec, hash, Provider, num, json, Contract, encode, Signature, typedData, uint256, RpcProvider, RPC } from "starknet";
import * as Merkle from "starknet-merkle-tree";
import * as dotenv from "dotenv";
import fs from "fs";
dotenv.config();

async function main() {
    const list = json.parse(fs.readFileSync("./src/scripts/merkleTree/airdropSJS6Sepolia/listAddressesSepolia.json").toString("ascii"));
    // each leaf is a string array : address, number of token
    const airdrop: Merkle.InputForMerkle[] = list.list;
    const tree1 = Merkle.StarknetMerkleTree.create(airdrop, Merkle.HashType.Poseidon);
    console.log("root =", tree1.root); // for smartcontract constructor
    fs.writeFileSync('./src/scripts/merkleTree/airdropSJS6Sepolia/treeListAddressSepolia.json', JSON.stringify(tree1.dump(),undefined,2));

    const tree = Merkle.StarknetMerkleTree.load(
        JSON.parse(fs.readFileSync('./src/scripts/merkleTree/airdropSJS6Sepolia/treeListAddressSepolia.json', 'ascii'))
    );
    // process.exit(5);
    const accountAddress = '0x0324f3401Bb5CB9B7b396BC6065faD94D32cd7628a39C89EeaD456f077f27c0e';
    const indexAddress = tree.dump().values.findIndex((leaf) => leaf.value[0] == accountAddress);
    if (indexAddress === -1) {
        throw new Error("address not found in the list.");
    }
    const inpData = tree.getInputData(indexAddress);
    console.log("Leaf #", indexAddress, "contains =", inpData);
    const leafHash = Merkle.StarknetMerkleTree.leafHash(inpData, Merkle.HashType.Poseidon);
    console.log("leafHash =", leafHash);
    const proof = tree.getProof(indexAddress);
    console.log("corresponding proof =", proof);
    const isValid = tree.verify(inpData, proof);
    console.log("This proof is", isValid);
    // console.log(tree.render());
    console.log("✅ test completed.");
}
main()
    .then(() => process.exit(0))
    .catch((error) => {
        console.error(error);
        process.exit(1);
    });