Any Ethereum transaction is wrapped into native format. In order to execute native transaction, someone should pay a fee in native coin. EVM bridge is managing this routine. Its a regular web-server that wrap EVM transaction into native, and take gas price as fee.
To run your evm-bridge locally, just provide a path to keyfile address to velas native rpc, listener address and chain id.
For testnet we provide a public evm-bridge, which is located at https://testnet.velas.com/rpc
Gas price, and gas limit collecting:
Every evm-bridge is responsible to set it's own commision, every evm-bridge users is paying this commission by increasing gas price in transaction. This mechanism provide incentivise to host your own evm bridge publicly, and increase decentralisation.