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GET /signatures/

<form class="form-inline" action="/signatures/" method="get" novalidate="">
  <label for="bytes4_signature">Search Signatures</label>
  <div class="form-group ">
    <label class="sr-only"> Bytes4 signature </label>
    <input name="bytes4_signature" class="form-control" type="text" placeholder="0x70a08231">
  </div>
  <button type="submit" class="btn btn-default">Search</button>
</form>

Text Content

Ethereum Signature Database
 * Function Signatures
 * Event Signatures
 * Submit Signatures
 * Submit ABI
 * Submit Solidity Source File

 * API Docs




WELCOME TO THE ETHEREUM SIGNATURE DATABASE

Function calls in the Ethereum Virtual Machine are specified by the first four
bytes of data sent with a transaction. These 4-byte signatures are defined as
the first four bytes of the Keccak hash (SHA3) of the canonical representation
of the function signature. The database also contains mappings for event
signatures. Unlike function signatures, they are defined as 32-bytes of the
Keccak hash (SHA3) of the canonical form of the event signature. Since this is a
one-way operation, it is not possible to derive the human-readable
representation of the function or event from the bytes signature. This database
is meant to allow mapping those bytes signatures back to their human-readable
versions.


THERE ARE 1,208,886 SIGNATURES IN THE DATABASE

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TOS AND LICENSING

The data from this service is given free of any license or restrictions on how
it may be used.

Usage of the API is also granted with the single restriction that your usage
should not disrupt the service itself. If you wish to scrape this data, feel
free, but please do so with limited concurrency. You are encouraged to scrape
your own copy of this data if your use case is likely to produce heavy load on
the API.

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