# USDC AA Payment

> Non-custodial Arc Testnet USDC group payment links for EOA and AA wallet receivers.

USDC AA Payment lets a receiver create one payment link for a group payment. Each payer opens the same link, connects a Web3 wallet, approves USDC when needed, and pays an equal share on-chain. The PaymentManager contract records payment state but does not custody user funds.

## Primary Links

- App: https://usdcaa.com/
- Sitemap: https://usdcaa.com/sitemap.xml
- Full LLM context: https://usdcaa.com/llms-full.txt
- Source code: https://github.com/okuai/usdcaa
- Documentation: https://github.com/okuai/usdcaa/blob/main/README.md

## Key Facts

- Network: Arc Testnet
- Chain ID: 5042002
- RPC: https://rpc.testnet.arc.network
- Explorer: https://testnet.arcscan.app
- USDC token: 0x3600000000000000000000000000000000000000
- PaymentManager: 0xF8Cefd1d7a6C52eE621e939CFA49f929983f5E3B
- Supported interface languages: English, Traditional Chinese, Japanese, Korean

## Main Capabilities

- Create one payment link for a USDC payment group
- Split a total USDC amount evenly across 1 to 100 payers
- Let each payer address pay only once
- Read payment status, paid count, paid amount, receiver, and payer history from Arc Testnet RPC
- Transfer USDC directly from payer to receiver with ERC-20 transferFrom
- Use EOA or AA smart account addresses as receivers

## Crawl Guidance

- The canonical public page is `/`.
- Payment links use the pattern `/0x{bytes32-group-id}` and are transaction-specific. They should not be treated as separate documentation pages.
- The source repository and README contain implementation details for the Solidity contract, ethers client helpers, and deployment configuration.