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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.

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:

• Buffer (from stdlib)
• gzipSync (from zlib)
• BigNumber
• borsh
• bs58
• viem