cfx_getFeeBurntParams(1)1. epoch_number (required)U64(one of)string or nullMatch pattern:^0x([1-9a-f][0-9a-f]{0,15}|0)$Result(cfx_getFeeBurnt_result)stringMatch pattern:^0x([1-9a-f][0-9a-f]{0,63}|0)$