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  1. Best Practice

Registering Your Contract's Method Names

PreviousEthSignatureNextRegistering Tokens with Users

Last updated 2 years ago

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OneKey uses the Parity on-chain registry of function signatures to display method names on the confirm screen. For many common method names, like token methods, this allows OneKey to successfully look up the method names by their . However, sometimes you're using a method that is not in that on-chain registry, and OneKey will simply display Contract Interaction to the user.

To add your contract's function names to this registry so it shows in the OneKey interface, follow the below steps.

  1. Go to the

  2. Connect OneKey

  3. Use etherscan's write contract feature to input the string value (without quotes or spaces) to the register function

    For example:

    getOwners()

    execTransaction(address,uint256,bytes,uint8,uint256,uint256,uint256,address,address,bytes)

  4. Click "write"

  5. Approve the transaction in OneKey (you only pay gas)

Verify

ethers.utils.keccak256('getOwners()') => 0xa0e67e2bdc0a6d8a09ccd6c353c9df590807ad66ff5e6630c4f31a86dfa84821

  • Take the first 10 characters: 0xa0e67e2b

  • Input them into that checks the on-chain registry

    • Mainnet or Rinkeby only

Using remix.ethereum.org

  • Set the correct compiler version based on the contract.

  • Use remix's write functionality to add to the registry.

Using eth-method-registry

    • Note that OneKey reads from the Mainnet eth-method-registry endpoint, regardless of user's network.

Paste the contract code from into .

You can look at the FUNCTIONHASHES section on by loading the signature registry contract, press the "details" button on the compile tab.

You can also use the deployed on Rinkeby

is used to lookup methods in OneKey.

For more details, see .

⛳
method signature
Mainnet Parity signature registration contract on etherscan
this demo app
bokky's blog post
remix
remix
signature registry
eth-method-registry
this StackExchange answer