Contracts with incorrect results? Report here please

[shazow]

Please report any examples of contracts (ideally addresses deployed on mainnet) which yield incorrect selector results with whatsabi.

[Taryax]

Hello @shazow ,

A simple contract that I compiled does not work.

Here is the bytecode : 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

A DUP1 - ISZERO - PUSHN sequence is found before the Jump table, putting a 0x00000000 selector in p, thus the checkJumpTable is set to false skipping every next selector.

[shazow]

@Taryax Oh good find, thank you! And I extra-appreciate the debugging you already did. :)

[Taryax]

Ok I think I understood more precisely. What i copied here is the whole creation code. You'll have then the DUP1 - ISZERO - PUSHN sequence which is not normal in a runtime code. Then the JUMPDEST offsets are completely de-synchronized with the selectors.

Would it make sense then to detect if there is init codes at the beginning of the data ? And then only keep the good part ?

It works like a charm if I remove the first 36 bytes.

[shazow]

@Taryax Yea I think you're on the right track, I've been meaning to add some logic to separate out the init code but haven't gotten to it yet. Let me know if you'd like to work on that, it would be appreciated! :)

[shazow]

@Taryax I accidentally nerd sniped myself into doing it :blush: See #23

[Taryax]

The following bytecode (which is real runtime code this time :stuck_out_tongue:) is compiled from a contract not having payable nor fallback function (solidity 0.6.0) : 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

The compiler will then put a CALLVALUE - DUP1 - ISZERO - PUSHN - JUMP1 sequence at the beginning to revert if the transac contains wei. We are then in the same case than my first message. The Jump table is entirely skipped.

[shazow]

Ooo another good one, thank you!

[shazow]

Okay all of these examples are passing as of #23, let me know if there are other good ones. :)

[zilayo]

It seems to miss all functions for Uniswap V2 pairs.

Random example on mainnet: 0x2e7449135C8D7C9159dF7d23B6F66616893af99E

Bytecode:

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selectors:

[ '0x00000000' ]

abiFromBytecode:

[
  {
    type: 'function',
    selector: '0x00000000',
    payable: true,
    stateMutability: 'payable',
    inputs: [ [Object] ]
  },
  {
    type: 'event',
    hash: '0xd78ad95fa46c994b6551d0da85fc275fe613ce37657fb8d5e3d130840159d822'
  },
  {
    type: 'event',
    hash: '0x4c209b5fc8ad50758f13e2e1088ba56a560dff690a1c6fef26394f4c03821c4f'
  },
  {
    type: 'event',
    hash: '0xdccd412f0b1252819cb1fd330b93224ca42612892bb3f4f789976e6d81936496'
  },
  {
    type: 'event',
    hash: '0x1c411e9a96e071241c2f21f7726b17ae89e3cab4c78be50e062b03a9fffbbad1'
  },
  {
    type: 'event',
    hash: '0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925'
  },
  {
    type: 'event',
    hash: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  {
    type: 'event',
    hash: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  {
    type: 'event',
    hash: '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'
  },
  {
    type: 'event',
    hash: '0x64732d6d6174682d6164642d6f766572666c6f77000000000000000000000000'
  }
]

Can check other pairs by grabbing a random tx from the Uniswap v2 factory internal txs (https://etherscan.io/address/0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f#internaltx) and then grab the pair address from the internal create2 tx

[shazow]

@Zil-B can you try it with the latest version in main? I'm getting "0xd21220a7" "0xd505accf" "0xdd62ed3e" "0xfff6cae9" "0xba9a7a56" "0xbc25cf77" "0xc45a0155" "0x7ecebe00" "0x89afcb44" "0x95d89b41" "0xa9059cbb" "0x6a627842" "0x70a08231" "0x7464fc3d" "0x3644e515" "0x485cc955" "0x5909c0d5" "0x5a3d5493" "0x23b872dd" "0x30adf81f" "0x313ce567" "0x095ea7b3" "0x0dfe1681" "0x18160ddd" "0x022c0d9f" "0x06fdde03" "0x0902f1ac"

[zilayo]

ah my mistake I was using the v0.4.1 release.

It's working as expected in the latest main version

Thanks!

[shazow]

No worries, I need to do a v0.5 release soon, my bad!

[shazow]

v0.5.0 has been released!

[shazow]

0x4870525eae23fceb31df613d179ef6275e1b93a9 still has incorrect results, only catches 0x000000ff which I think throws it off.

Edit: Actually not sure this one even has a jump table? Interesting.

[shazow]

0xe38d8f2a1787f4d9ec0a671f4d39f7788fd3b235 on Arbitrum is a custom brainfuck contract, would be fun to try to get some selectors out of it: https://brainfucktoken.eth.link/