Change EVM version to an older one to support older blockTags #6
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I get the following error message when using an old blockTag:
invalid opcode: PUSH0It looks like
PUSH0was introduced in Shanghai in Apr 2023.Targeting an older EVM version and recompiling the contract seems to work.
solc has an
--evm-versionargument but solcjs does not. But it's possible to specify it using the standard JSON interface. I created asolidity-config.jsonfile (or rather ChatGPT did it for me) and modifiedbuild-solcinpackage.json. I also adjustedsrc.ts/_build.tsto use the new output which is a single JSON file with both the ABI and bytecode.Byzantium released in Oct 2017 was the oldest EVM version I managed to get working. When trying to use an even older version I get the following compile error:
TypeError: The "staticcall" instruction is only available for Byzantium-compatible VMs