Wrappers

The wrapper package defines wrappers around Cosmos SDK modules required to handle coins with different representation of the decimals inside the x/evm module.

All wrapper implementations should be used only for transaction executions that involves the EVM. When a keeper is required as a dependency for another Cosmos SDK module, it should be used the original Keeper.

BankWrapper

This package contains the BankWrapper, a wrapper around the Cosmos SDK bank keeper that is designed to manage the EVM denomination with a custom decimal representation. The primary purpose of the BankWrapper is to handle conversions between Cosmos SDK's default decimal system and the 18-decimal representation commonly used in EVM-based systems.

Features

• Balance Conversion: Automatically converts balances to 18 decimals, the standard for EVM coins.
• Send and Receive Coins: Handles sending coins between accounts and modules, ensuring proper conversion to and from the 18-decimal system.
• Mint and Burn Coins: Provides methods for minting and burning coins, with conversions applied as necessary.

Conversion Logic

The wrapper uses helper functions to convert between Cosmos SDK's bank module decimal representation and EVM's 18-decimal standard:

• mustConvertEvmCoinTo18Decimals: Converts a coin to 18 decimals.
• convertCoinsFrom18Decimals: Converts coins from 18 decimals to their original representation.

Both methods convert only the evm denom amount.