[G-02] Updating solidity version to the latest saves gas
Use a solidity version of at least 0.8.2 to get simple compiler automatic inlining Use a solidity version of at least 0.8.3 to get better struct packing and cheaper multiple storage reads Use a solidity version of at least 0.8.4 to get custom errors, which are cheaper at deployment than revert()/require() strings Use a solidity version of at least 0.8.10 to have external calls skip contract existence checks if the external call has a return value
https://swcregistry.io/docs/SWC-103
[G-03] Use custom errors rather than revert()/require() strings to save deployment gas
Custom errors are available from solidity version 0.8.4.
TABLE OF CONTENTS
[G-01] Using > 0 costs more gas than != 0 when used on a uint in a require() statement
https://github.com/code-423n4/2022-10-thegraph/blob/309a188f7215fa42c745b136357702400f91b4ff/contracts/gateway/L1GraphTokenGateway.sol#L201 https://github.com/code-423n4/2022-10-thegraph/blob/309a188f7215fa42c745b136357702400f91b4ff/contracts/gateway/L1GraphTokenGateway.sol#L217 https://github.com/code-423n4/2022-10-thegraph/blob/309a188f7215fa42c745b136357702400f91b4ff/contracts/l2/gateway/L2GraphTokenGateway.sol#L146
[G-02] Updating solidity version to the latest saves gas
Use a solidity version of at least 0.8.2 to get simple compiler automatic inlining Use a solidity version of at least 0.8.3 to get better struct packing and cheaper multiple storage reads Use a solidity version of at least 0.8.4 to get custom errors, which are cheaper at deployment than
revert()/require()strings Use a solidity version of at least 0.8.10 to have external calls skip contract existence checks if the external call has a return value https://swcregistry.io/docs/SWC-103[G-03] Use custom errors rather than revert()/require() strings to save deployment gas
Custom errors are available from solidity version 0.8.4.
eg. https://github.com/code-423n4/2022-10-thegraph/blob/309a188f7215fa42c745b136357702400f91b4ff/contracts/gateway/L1GraphTokenGateway.sol#L110-L111