View Source DiodeClient.Contracts.CallPermit (Diode Client v1.1.5)
Moonbeam CallPermit contract https://github.com/moonbeam-foundation/moonbeam/blob/master/precompiles/call-permit/CallPermit.sol
Moonbeam CallPermit contract https://github.com/moonbeam-foundation/moonbeam/blob/master/precompiles/call-permit/CallPermit.sol