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Functions

To aid in transformations, we’ve begun open sourcing common utility functions and templates. You can view all of this on GitHub and as an npm package.
Pull requests are welcome! We need the community’s help for bugs, new templates, and commonly used utilities.
Here’s a list of the available functions as they can be used within transformations:
  • templates.token_transfers(block): pass in an entire block (EVM or not) and get back all of the token transfers within it
  • utils.evmAddressToChecksum(address): convert an EVM address to its checksum form
  • utils.evmChainToId(chain): convert an EVM chain name to a chainId; try block._network to get the current chain name
  • utils.evmDecodeLog(log, signatures[]): try decoding an EVM log against a list of event signatures
  • utils.evmDecodeLogWithMetadata(log, signatures[]): same as evmDecodeLog, but also return the name of the matching event
  • utils.evmMethodSignatureToHex(signature): convert an EVM event signature (e.g. from an ABI) to its topic0, hexadecimal form

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Available Packages

Although transformations are run in a sandboxed environment, we inject a select few npm packages that can also be used. These include: