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descriptionSimple web app to generate optimized function selectors for Solidity.
last changeThu, 23 Apr 2026 06:44:00 +0000 (23:44 -0700)
URLhttps://git.ardis.lu/4-byte-gen.git
ssh://git@git.ardis.lu/~/4-byte-gen.git
git@git.ardis.lu:4-byte-gen.git
readme

4-byte-gen

Simple web app to generate optimized function selectors for Solidity.

Similar projects:

Code repository mirrors: GitHub, Codeberg, git.ardis.lu

Example

Demonstration of the 4-byte-gen web UI finding optimized function names for standard ERC-20 functions.

  1. Input the standard ERC-20 functions transfer, transferFrom, and approve. You can copy the function definition directly from your Solidity code without modification.
  2. Adjust "Minimum number of zero bytes" to the desired number of zero bytes to mine for. Check out 4-byte-gas-test for a comparison of gas costs between functions with zero bytes.
  3. Click "Parse functions" and the tool will normalize the function definitions (i.e., remove spaces, input names, and extraneous keywords).
  4. Click "Start all" and the tool will start mining for optimized function names (each function is mined using its own web worker, so they are mined in parallel).
shortlog
2026-04-23 Ardis LuOptimize image main commit | commitdiff | tree | snapshot (zip tar.gz)
2026-01-12 Ardis LuAdd code repository mirrors commit | commitdiff | tree | snapshot (zip tar.gz)
2026-01-11 Ardis LuAdd MIT license commit | commitdiff | tree | snapshot (zip tar.gz)
2024-10-06 Ardis LuFurther minify by mangling props and strings commit | commitdiff | tree | snapshot (zip tar.gz)
2024-04-06 Ardis LuUse precise terminology commit | commitdiff | tree | snapshot (zip tar.gz)
2024-03-27 Ardis LuUpgrade noble-hashes to 1.4.0 commit | commitdiff | tree | snapshot (zip tar.gz)
2024-03-13 Ardis LuDisable spellcheck for textarea commit | commitdiff | tree | snapshot (zip tar.gz)
2024-02-23 Ardis LuFix issue where multi-line definitions with the same... commit | commitdiff | tree | snapshot (zip tar.gz)
2024-02-18 Ardis LuAdd usage example commit | commitdiff | tree | snapshot (zip tar.gz)
2024-02-12 Ardis LuAdd basic lookahead for multi-line function definitions commit | commitdiff | tree | snapshot (zip tar.gz)
2024-02-12 Ardis LuAdd additional check for strict mode commit | commitdiff | tree | snapshot (zip tar.gz)
2024-02-11 Ardis LuParse functions with space between identifier and paren... commit | commitdiff | tree | snapshot (zip tar.gz)
2024-01-28 Ardis LuAdd data attributes to ignore other password managers commit | commitdiff | tree | snapshot (zip tar.gz)
2023-12-24 Ardis LuPreload all assets commit | commitdiff | tree | snapshot (zip tar.gz)
2023-12-21 Ardis LuUpgrade noble-hashes to 1.3.3 commit | commitdiff | tree | snapshot (zip tar.gz)
2023-11-22 Ardis LuPreserve tuples in parameterTypes commit | commitdiff | tree | snapshot (zip tar.gz)
...
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5 months ago main shortlog | log | tree
Simple web app to generate optimized function selectors for Solidity.
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