Mihenk Pay
Condition-based USDC payments between crypto projects and KOLs (influencers). Part of Mihenk AI.
Mihenk AI measures which crypto KOLs really move the market: real reach (median views per post, not followers), bot-screened audiences, and every coin call scored against BTC. Mihenk Pay uses those measurements to settle KOL deals on-chain. The project locks the fee in USDC, the KOL accepts from the payout wallet, and the contract releases the money only when Mihenk verifies the post. Whatever isn't earned goes back to the project.
Live on Arc, Base, Monad, Sei, Avalanche C-Chain and Arbitrum One mainnet with native USDC. Current version: v2 (22 Oct 2026, addresses below).
How it works
- Lock. The project (or its agency) locks the fee for one KOL in a supported stablecoin (USDC, or any standard ERC-20 the owner allows). Terms are agreed off-chain; only their hash goes on-chain.
- Accept. The KOL accepts from the payout wallet. This proves the wallet belongs to the KOL before any money moves.
- Verify and settle. After the post has stayed live for the agreed period, Mihenk posts the result. The project sets a minimum time on-chain, counted from the KOL's acceptance, before which Mihenk cannot settle. One part of the fee is earned on delivery, the rest when the real-reach target is met. Only a hash of the measurement report goes on-chain.
- Dispute window. Either side can dispute within the window (24 hours to 14 days, 3 days by default). The owner resolves with a corrected payout.
- Close. Anyone can finalize after the window. The KOL receives the earned amount minus Mihenk's fee; the project gets back everything not earned.
If Mihenk never settles before the deadline, the project can reclaim the full amount. An unresolved dispute falls back to Mihenk's result after 30 days. If the token refuses a payout (for example to a USDC-blacklisted address), the other payouts still go through and the refused amount is credited to that address, which can claim it later itself. Funds can never be stuck.
Design choices
- Payouts are never tied to a token's price. Paying KOLs for price moves would reward pumping. Mihenk pays for delivery and real reach only.
- Commercial terms stay confidential. No social handles on-chain; the chain holds only hashes of the terms and of the result.
- Fee rate and fee recipient are fixed per campaign at creation; the rate is hard-capped at 10%, so neither can change after a project has funded.
- Separate roles. The owner, the verifier and the fee recipient are separate addresses;
Deploy.s.sol can hand ownership to a Safe multisig (OWNER).
- Fee-on-transfer tokens are rejected, and every token must be allow-listed.
- Two-step ownership, reentrancy guards, SafeERC20, custom errors.
Setup
git clone https://github.com/MihenkAI/mihenk-pay-contracts && cd mihenk-pay-contracts
git clone --depth 1 https://github.com/foundry-rs/forge-std lib/forge-std
git clone --depth 1 --branch v5.1.0 https://github.com/OpenZeppelin/openzeppelin-contracts lib/openzeppelin-contracts
forge test
Tests
37 Foundry tests, including a fuzz test proving that every unit locked always ends up with the KOL, the project or the fee recipient (paid out, or credited for claim when an address is blacklisted), and nothing is stuck in the contract.
Deploy
DEPLOYER_KEY=... VERIFIER=0x... FEE_RECIPIENT=0x... TOKEN=0x... OWNER=0x<safe> \
forge script script/Deploy.s.sol --rpc-url <RPC> --broadcast
If TOKEN is empty, a testnet-only TestUSD with an open faucet is deployed and allow-listed. DISPUTE_WINDOW defaults to 3 days (minimum 24 hours). script/DemoLive.s.sol runs the full flow on a live network with a real stablecoin.
On Arc, USDC is the native gas token and its ERC-20 interface (0x3600…0000) is backed by a precompile that Foundry's local EVM does not implement, so forge script cannot simulate token calls there. Deployment works with forge script; the Arc demo campaign below was sent with cast send, letting the node estimate gas.
Deployments
v2 (live since 22 Oct 2026)
Deployed with script/Deploy.s.sol from this code. Owner 0x9e366c62f1310115e5832af0d46c6f26f8a1e0b4; verifier and fee recipient 0x845B9cff41Eb67e56673375D842b7C5b949Cc7aA; fee 3%; dispute window 3 days (1 day on Sei); native USDC allow-listed. Source verified on Sourcify (exact match) on all six networks.
This is the beginning of the README. Read the rest at the original. Read the full README ↗
