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Paymaster 调研

ERC7677

https://www.erc7677.xyz/guides/construct-user-op-with-7677

Paymaster Services

核心API

pm_getPaymasterStubData

用于预估含有paymaster的userOp的Gas estimates https://www.erc7677.xyz/getting-started#getting-started

pm_getPaymasterData

user operation 中 paymasterData 字段 Paymaster 服务必须检测正在使用的 EntryPoint 版本，并根据检测到的 EntryPoint 版本处理和响应请求

stackup-paymaster 代码中，没有提供上述两个rpc，可以参考 PaymasterAndData的生成过程

Pm_sponsorUserOperation

https://github.com/stackup-wallet/stackup-paymaster/blob/2d78f4e7f4379438e4fe6f03d6de3ed6b65eca3e/pkg/handlers/payg/handler.go#L73

参考代码

V6 https://github.com/pimlicolabs/erc7677-proxy/blob/a2f3f85f2fd8232847ca1c71091320f9dddd57ef/src/app.ts#L79-L131 V7 https://github.com/pimlicolabs/erc7677-proxy/blob/a2f3f85f2fd8232847ca1c71091320f9dddd57ef/src/app.ts#L133-L184

Paymaster service providers that support ERC-7677

https://www.erc7677.xyz/ecosystem/paymasters

Coinbase Developer Platform
Pimlico
ZeroDev
Biconomy
permissionless.js

Viem 代码实现

通过 createPaymasterClient 创建 PaymasterClient 调用 Paymaster Services 两个rpc方法

https://viem.sh/account-abstraction/actions/paymaster/getPaymasterData

https://viem.sh/account-abstraction/actions/paymaster/getPaymasterStubData

在viem prepareUserOperation api 中有具体根据userOp中paymaster（多种数据类型）相关字段信息调用 viem getPaymasterStubData 、getPaymasterData 实现过程

见viem:

Paymaster 合约

https://docs.pimlico.io/infra/paymaster/verifying-paymaster

https://docs.pimlico.io/infra/paymaster/erc20-paymaster

https://github.com/pimlicolabs/erc20-paymaster/blob/main/src/ERC20PaymasterV06.sol

https://github.com/pimlicolabs/erc20-paymaster/blob/main/src/ERC20PaymasterV07.sol

ERC7677
Paymaster Services
- 核心API
- 参考代码
Paymaster service providers that support ERC-7677
Viem 代码实现
Paymaster 合约