# Foundational Stores

Foundational stores are available for various blockchain ecosystems, each optimized for specific data patterns and use cases:

### Ethereum

* [ERC20 Token Metadata](https://docs.substreams.dev/how-to-guides/composing-substreams/foundational-stores/erc20-token-metadata) - Store and serve ERC20 token metadata and balances

### Solana

* [SPL Initialized Account](https://docs.substreams.dev/how-to-guides/composing-substreams/foundational-stores/spl-initialized-account) - Track SPL token account initialization and ownership

## Additional Resources

* [Foundational Stores Reference](https://docs.substreams.dev/reference-material/core-concepts/foundational-store-reference) - Detailed architecture and technical specifications