> ## Documentation Index
> Fetch the complete documentation index at: https://docs.indexing.co/llms.txt
> Use this file to discover all available pages before exploring further.

# Helpers

> Functions and packages for transformations.

# Functions

To aid in transformations, we've begun open sourcing common utility functions and templates. You can view all of this on [GitHub](https://github.com/indexing-co/jiti) and as an [npm package](https://www.npmjs.com/package/@indexing/jiti).

<Note>
  Pull requests are welcome! We need the community's help for bugs, new templates, and commonly used utilities.
</Note>

Here's a list of the available functions as they can be used within transformations:

* `templates.tokenTransfers(block)`: pass in an entire block (EVM or not) and get back all of the token transfers within it
* `utils.blockToTimestamp(block)`: derive the timestamp from a given block
* `utils.blockToVM(block)`: helper to determine which VM a given block came from (e.g. EVM, SVM, UTXO)
* `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

# 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](https://www.npmjs.com/package/bignumber.js)
* [borsh](https://www.npmjs.com/package/@coral-xyz/borsh)
* [bs58](https://www.npmjs.com/package/bs58)
* [viem](https://www.npmjs.com/package/viem)