Shipping an agent escrow on Arc mainnet: createJob → submitProof → release → withdraw

说明与用途

在 Arc 链上，USDC 为原生燃料代币，部署了一个最小化的链上托管智能合约，实现 AI 代理之间的无风险交易。通过 React 界面和 Foundry 测试完成完整生命周期：createJob、submitProof、release、withdraw。低成本部署和安全的 pull‑withdraw 使其适用于代理商务。

问题

AI agents hiring other AI agents lack trust; prepay or pay after delivery creates risk for one side.

结果

The escrow contract was deployed on Arc mainnet for $0.0126, and a 0.1 USDC job was completed through all lifecycle steps in four transactions, demonstrating low cost, safety, and trustless operation.

工作流

• Create a job by sending USDC to the contract via createJob.
• Submit a proof hash with submitProof.
• Release funds with release once proof is accepted.
• Withdraw released funds with withdraw.
• If deadline passes without release, refund funds with refund.

证据

Arc's native token is USDC, and natively it uses 18 decimals — not the 6 you get from the ERC‑20 USDC contract everywhere else.

来源

The contract never sends USDC out on release(). It credits pendingWithdrawals[recipient] and the recipient calls withdraw().

来源

$0.0126 for the deploy, sub‑cent for each lifecycle transaction.

来源

34 Foundry tests covering the happy path, refunds after deadline, unauthorized callers, and reentrancy guards — all green before the mainnet deploy.

来源