Using newer compiler versions and the optimizer gives gas optimizations and additional safety checks for free!
The advantages of versions 0.8.* over <0.8.0 are:
0.8.0 (can be more gas efficient than some
library based safemath).0.8.2, leads to cheaper runtime gas.
Especially relevant when the contract has small functions. For
🥇 Instead of sending Ether, use the withdrawal pattern
🥈 If you really need to send Ether, use a safe wrapper like OpenZeppelin's Address.sendValue(addr, amount)
🥉 If you really need to send Ether without dependencies, use (bool success, ) = addr.call{value: amount}("")
| # quine.etk | |
| # ⬜ => ⬜ | |
| # A quine is a computer program which takes no input and produces a copy of its own source code as its only output. | |
| # 0x80...f3 is the compiled code excluding the push16 instruction (from dup1 to return) | |
| push16 0x8060801b17606f5953600152602136f3 | |
| # --- stack --- | |
| dup1 # code code | |
| push1 128 # 128 code code |
| // Reverse bytes received in calldata (abcd -> dcba) | |
| // https://twitter.com/huff_language/status/1583894073487654913 | |
| // code length 206 | |
| /// @author Philippe Dumonet <philippe@dumo.net> -- https://twitter.com/real_philogy/status/1584304102418223104 | |
| /// @author karma (@0xkarmacoma) -- https://twitter.com/0xkarmacoma/status/1584239664310779904 | |
| /// @author kaden.eth (@0xKaden) -- https://twitter.com/0xKaden/status/1584280521089376256/ | |
| #define macro reverse_word() = takes(1) returns(1) { | |
| // [x0] | |
| 0x00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff |