Hosted checkout
Pay $5 on Base
This checkout uses a direct wallet address. Base is the default because fees are usually lower. You can send $5 USDC on Base or the ETH equivalent on Base. Use Ethereum mainnet ETH only as a fallback. After payment, send the transaction hash for manual verification.
Preferred payment: $5 USDC on Base. ETH on Base also works. Fallback network: Ethereum mainnet ETH. Do not send tokens on unrelated networks.
Send exactly 5 USDC to the address above, then email the transaction hash. This is the clearest payment path because the amount does not move with ETH price.
Fetching the latest ETH price now. If that fails, use this fallback estimate or send the current equivalent of $5 on Base or mainnet.
On mobile, open Trust Wallet, MetaMask, Rabby, or Coinbase Wallet and scan. Confirm the network before sending.
Send your transaction hash to liuchang8877@gmail.com or open a GitHub issue. After manual verification, you receive the buyer zip. Delivery target: within 24 hours after proof is received.
Want the kit but cannot pay with crypto? Email me. I will not claim card checkout is available until it is actually live.
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