Protocol Implementation Snippets

Protocol Implementation Snippets

Below are core implementation excerpts from TasQ’s internal repositories, demonstrating critical processes for compute coordination, task execution, proofing, and settlement. This page aggregates nine focused snippets.

1) Zero-Knowledge Proof Validation (Groth16 on Ethereum)

pragma solidity ^0.8.17;
import "@openzeppelin/contracts/access/Ownable.sol";
import "./Verifier.sol";

contract ZKTaskValidation is Ownable {
    Verifier public verifier;
    event TaskValidated(bytes32 taskId, address contributor, bool result);
    constructor(address _verifier) { verifier = Verifier(_verifier); }
    function validateTask(
        bytes32 taskId,
        uint256[2] memory a, uint256[2][2] memory b, uint256[2] memory c,
        uint256[] memory input
    ) public {
        require(verifier.verifyProof(a, b, c, input), "Invalid ZK proof");
        emit TaskValidated(taskId, msg.sender, true);
    }
}

2) Parallel Task Allocation Routine (Python)

from concurrent.futures import ThreadPoolExecutor
from ledger_api import assign_task, mark_complete

def distribute_tasks(task_batch, node_list):
    with ThreadPoolExecutor(max_workers=len(node_list)) as ex:
        futs = [ex.submit(assign_task, node, task) for node, task in zip(node_list, task_batch)]
        for f in futs: f.result()
    mark_complete(task_batch)

3) Payout Contract Skeleton (Optimism / Ethereum)

pragma solidity ^0.8.17;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract Payout {
    IERC20 public token;
    uint256 public minRedeem = 25 ether; // 25 credits equivalent
    mapping(address => uint256) public balances;
    event Redeemed(address indexed user, uint256 amount);
    function redeem(uint256 amount) public {
        require(amount >= minRedeem, "Below minimum redeem limit");
        require(balances[msg.sender] >= amount, "Insufficient balance");
        balances[msg.sender] -= amount;
        require(token.transfer(msg.sender, amount), "Transfer failed");
        emit Redeemed(msg.sender, amount);
    }
}

4) Circom Circuit: Hash Preimage Check (Poseidon)

pragma circom 2.1.6;
include "circomlib/circuits/poseidon.circom";
component main {public [y]} = Poseidon(1);
signal input x;            // private input
main.inputs[0] <== x;      // feed Poseidon
// Proves y == H(x) without revealing x

5) Node-side Proof Generation (TypeScript, snarkjs)

import { groth16 } from "snarkjs";
export async function prove(input, wasm, zkey, vkey) {
  const { proof, publicSignals } = await groth16.fullProve(input, wasm, zkey);
  // client can pre-verify to avoid bad submits
  // const ok = await groth16.verify(vkey, publicSignals, proof);
  return { proof, publicSignals };
}

6) Scheduler: Weighted Round Robin with Health (Go)

type Node struct { ID string; Weight int; Healthy bool }
func pick(nodes []Node, last int) int {
  n := len(nodes)
  for i := 1; i <= n; i++ {
    idx := (last + i) % n
    if nodes[idx].Healthy && nodes[idx].Weight > 0 { return idx }
  }
  return -1
}

7) gRPC Worker API (proto)

syntax = "proto3";
service Worker {
  rpc FetchShard(FetchReq) returns (ShardResp);
  rpc SubmitProof(ProofReq) returns (Ack);
}
message FetchReq { string task_id = 1; uint32 shard_id = 2; }
message ShardResp { bytes payload = 1; bytes params = 2; }
message ProofReq { string task_id = 1; uint32 shard_id = 2; bytes result_hash = 3; bytes proof = 4; repeated bytes public_signals = 5; }
message Ack { bool ok = 1; string msg = 2; }

8) Merkle Aggregation and Finalize (TypeScript)

import { MerkleTree } from "merkletreejs"; import keccak256 from "keccak256";
export function finalize(shards) {
  const leaves = shards.map(s => keccak256(Buffer.from(s.resultHash.slice(2), 'hex')));
  const tree = new MerkleTree(leaves, keccak256, { sortPairs: true });
  const root = tree.getHexRoot();
  return root; // anchor on-chain with payout batch
}

9) Credits on Optimism (ERC1155)

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
contract TasqCredits is ERC1155 {
    address public ledger; modifier onlyLedger(){ require(msg.sender==ledger, "ledger"); _; }
    constructor(string memory uri_, address l) ERC1155(uri_) { ledger = l; }
    function mint(address to, uint256 id, uint256 amt) external onlyLedger { _mint(to, id, amt, ""); }
}

These snippets demonstrate end-to-end primitives: circuit authoring, client-side proofing, scheduling, transport, aggregation, and on-chain validation and credits. They are minimal by design and map directly to modules in the full codebase.