v1.0.0-p

BiconomyTokenPaymaster Release Notes

Overview

The BiconomyTokenPaymaster is a paymaster contract that enables users to pay gas fees using ERC20 tokens on EVM-compatible networks. It supports both external price quotes and independent oracle-based pricing mechanisms.

Key Features

Payment Modes

1. External Mode

   • Relies on trusted entity (verifyingSigner) for token amount to be charged
   • Requires signature validation
   • Flexible support for any ERC20 token

2. Independent Mode

   • Uses oracle-based pricing (Chainlink and TWAP)
   • No signature requirements
   • Supports pre-configured tokens only

Payment flow

• PM charges user at postOp phase
• Thus, the approve action to approve required amount of payment tokens should be included in the execution batch of the userOp