We have introduced changes to incorporate the new Token-2022 standard for spl-tokens into our codebase. These changes bring additional functionalities, such as fee calculations, to ensure accurate payments for transactions involving tokens adhering to the Token-2022 standard.
We have implemented a fee calculation mechanism to accurately calculate payments when dealing with tokens conforming to the Token-2022 standard. This ensures that users are charged the correct fees for their transactions involving these tokens.
Our codebase remains compatible with the regular token standard. The primary modification is the inclusion of the token mints as "remaining accounts." When using the program, ensure that the mint accounts are provided as remaining accounts.
The program expects the mint accounts to be passed as remaining accounts which are usually 2:
- Base Mint Account: This account represents the base token mint.
- Quote Mint Account: This account represents the quote token mint.
To ensure compatibility with both the older token standard and the Token-2022 standard, it is essential to provide the correct token_program when interacting with our program. This ensures seamless execution of transactions involving different token standards.
For tokens adhering to the older standard, the token fee is set to 0 by default. This means that no token fee calculation occurs for transactions involving tokens conforming to this standard.
We added the token_fee calculation logic in the token_utils file, located at programs/openbook-v2/src/token_utils.rs.
We believe these enhancements will provide a more robust and versatile experience for our users when working with different token standards.