The paymaster introduced in EIP-4337, collaborates with AA infrastructure, such as bundlers and entry point smart contracts, to reimburse them for covering the gas required for user operations.

What is Paymaster?

According to Vitalik Buterin, the Paymaster within the Account Abstraction mechanism is a valuable tool for abstracting the payment of transaction fees on the Ethereum network.

In simpler terms, a Paymaster is a contract with predefined criteria, designed to facilitate the implementation of features according to the requirements of individual EOA wallets. Paymasters enable users to pay for their transactions in various ways without having to hold Ether or sacrifice custody of their account.

Additionally, Paymasters have the capacity for sponsoring transactions. Projects can opt to use a sponsoring Paymaster for various purposes, such as simplifying participation for new users in web3, incentivizing platform-specific user behaviors, minting NFTs, and many other use cases.

The Use Cases of Paymaster in Sobajaswap

Pay fees in any token

Sobajaswap Protocol employs decentralized oracles to enable Paymasters to retrieve the exchange rate between stable tokens (e.g., USDC, USDT) and ETH. This allows for the automatic conversion of a user's stable token into ETH, enabling fee payment in a single transaction.

  • Sponsor transaction fees for Smart Accounts

  • Paying fees transacting by Stable token, USDC - USDT

  • Use Soba token to pay gas fees transacting

  • Minting an NFT without incurring gas fees

Sponsoring gas fees for users

Sobajaswap's dApp protocol sponsors the gas costs of user transactions, also Users possess chain native tokens that can be used to pay for gas and to interact with a dApp on chain providing a more seamless user experience.

Automatic payments

Paymaster is a smart contract Sobajaswap's Protocol that relays transactions. Sobajaswap provides a service that the user creates automatically and benefits from scheduled transfers, all while maintaining self-custody.

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