package task import ( "math/big" "time" "github.com/bsm/redislock" ) const ( gasLimit = 250000 lockPrefix = "lock:" lockRetryDelay = 25 * time.Millisecond lockTimeout = 1 * time.Second ) var ( // 20 gwei = max gas price we are willing to pay // 250k = max gas limit // minGasBalanceRequired is optimistic that the immidiate next transfer request will be successful // but the subsequent one could fail (though low probability), therefore we can trigger a gas lock. // Therefore our system wide threshold is 0.01 CELO or 10000000000000000 gas units minGasBalanceRequired = big.NewInt(20000000000 * 250000 * 2) ) // lockRetry will at most try to obtain the lock 20 times within ~0.5s. // it is expected to prevent immidiate requeue of the task at the expense of more redis calls. func lockRetry() redislock.RetryStrategy { return redislock.LimitRetry( redislock.LinearBackoff(lockRetryDelay), 20, ) } // balanceCheck compares the network balance with the system set min as threshold to execute a transfer. func balanceCheck(networkBalance big.Int) bool { return minGasBalanceRequired.Cmp(&networkBalance) < 0 }