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env-gaslog

Use env-gaslog to enable gas logging for a block of code. You can use this function to check the gas required to execute a specific block of code.

Basic syntax​

To enable gas logging for a specific block of code, use the following syntax:

(env-gaslog) code (env-gaslog)

Arguments​

The env-gaslog function does not take any arguments.

Return value​

The env-gaslog function returns the log messages in strings that describe the gas consumed by each operation in the code block.

Examples​

The following example demonstrates how to use the env-gaslog function to report the gas consumed for the specified map function:

(env-gasmodel "table") (env-gaslimit 10) (env-gaslog) (map (+ 1) [1 2 3]) (env-gaslog)
"Set gas model to table-based cost model"
"Set gas limit to 10"
["TOTAL: 0"]
[2 3 4]
["TOTAL: 7"
"map:GUnreduced:currTotalGas=4: 4"
"+:GUnreduced:currTotalGas=5: 1"
":GIntegerOpCost:(1, ):(1, ):Pact48IntThreshold:currTotalGas=5: 0"
"+:GUnreduced:currTotalGas=6: 1"
":GIntegerOpCost:(1, ):(2, ):Pact48IntThreshold:currTotalGas=6: 0"
"+:GUnreduced:currTotalGas=7: 1"
":GIntegerOpCost:(1, ):(3, ):Pact48IntThreshold:currTotalGas=7: 0"]

In this example, the ["TOTAL: 0"] message signals the beginning of gas logging for the map function. The messages after "TOTAL: 7" provide details about how the gas was calculated.