evvm
Fisher-signed pay
kernel
User signs an EVVM EIP-191 CSV message; a fisher wallet replays it on-chain and pays gas.
how it drives the UI
One button — Google login via Privy, then Pay with USDC. No wallet extension, no faucet.
Ten onchain primitives, demystified.
Every idea in this repo leans on one of ten web3 primitives — five EVVM fisher-signed payment flows and five zkVault shielded-note flows. All run against Ethereum Sepolia so you can ship a verifiable demo with zero hosting cost and zero gas paid by your users.
The four secrets
Add these in your Lovable project (Settings → Secrets) before running the deploy scripts:
- METAMASK_PRIVATE_KEYSepolia deployer AND fisher wallet (single-EOA model). Fund via the Google Cloud faucet.open ↗
- SEPOLIA_RPC_URLAlchemy Sepolia HTTPS URL. Public RPCs throttle under load.open ↗
- ETHERSCAN_API_KEYFor forge verify-contract after deploy.open ↗
- PRIVY_APP_IDGoogle sign-in + native gas sponsorship on Sepolia.open ↗
200 ideas use this
evvm
MNS handles
kernel
Register human-readable handles via EVVM's Name Service reveal flow (two-leg signature).
how it drives the UI
Search a name, buy it in USDC, share the handle. Fisher settles both legs.
evvm
Public staking
kernel
Two-leg stake: op leg uses ZERO sender, pay leg's sender MUST equal the Staking contract.
how it drives the UI
Stake USDC toward a curator/creator; earn a share of protocol fees.
evvm
Swap maker/taker
kernel
Make, cancel, or fill an EVVM swap order — Swap contract is the pay-leg sender.
how it drives the UI
List asset for USDC, wait for a taker, or fill someone else's order.
evvm
Split payment
kernel
One signed message pays many recipients atomically via Core.split.
how it drives the UI
Enter a payee list with shares; one sponsored click settles everyone.
zkvault
Shielded deposit
kernel
Deposit USDC into ShieldedPool; commitment lands on-chain, note lives client-side.
how it drives the UI
Amount + Deposit; the app hands back a shielded note as an encrypted blob.
zkvault
Shielded withdraw
kernel
Browser-generate a Noir/UltraHonk proof (bb.js 4.2.0) that unlocks a note to any recipient.
how it drives the UI
Paste note, pick recipient, click Withdraw. The fisher submits the proof.
zkvault
Note split
kernel
Split one note into two commitments in-pool; proves conservation of value.
how it drives the UI
Enter split amount; get back two new note blobs for private balance.
zkvault
Private tip
kernel
Recipient never appears in a public transfer — a shielded split re-anchors value to their key.
how it drives the UI
Drop a link that mints a claimable shielded note to the recipient.
zkvault
Shielded payroll
kernel
Batch-split one funding note into N recipient notes in one browser proving session.
how it drives the UI
CSV of payees → 'Run payroll' → each employee grabs their note.
x402
x402 paywall
kernel
Self-hosted x402 v2 facilitator settles USDC via EIP-3009 transferWithAuthorization on Sepolia; MetaMask signs, relayer pays gas.
how it drives the UI
Sign in with Privy, connect MetaMask, click to unlock — the facilitator returns a PAYMENT-RESPONSE tx hash.