> For the complete documentation index, see [llms.txt](https://docs.gridplus.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gridplus.io/blockchain-basics.md).

# Blockchain Basics

- [What Is a Blockchain?](https://docs.gridplus.io/blockchain-basics/introduction.md)
- [Wallets](https://docs.gridplus.io/blockchain-basics/wallets.md)
- [A Brief Introduction to Private Keys](https://docs.gridplus.io/blockchain-basics/a-brief-introduction-to-private-keys.md)
- [Blocks & Consensus Mechanism](https://docs.gridplus.io/blockchain-basics/blocks-and-consensus-mechanism.md)
- [UTXO vs. Account Model](https://docs.gridplus.io/blockchain-basics/utxo-vs.-account-model.md)
- [Bitcoin](https://docs.gridplus.io/blockchain-basics/bitcoin.md)
- [Ethereum](https://docs.gridplus.io/blockchain-basics/ethereum.md)
- [Smart Contracts](https://docs.gridplus.io/blockchain-basics/ethereum/smart-contracts.md)
- [ERC-20 tokens](https://docs.gridplus.io/blockchain-basics/ethereum/erc-20-tokens.md)
- [NFTs](https://docs.gridplus.io/blockchain-basics/ethereum/nfts.md)
- [Layer 2s](https://docs.gridplus.io/blockchain-basics/ethereum/layer-2s.md)
- [Solana](https://docs.gridplus.io/blockchain-basics/solana.md)
- [Proof of History](https://docs.gridplus.io/blockchain-basics/solana/proof-of-history.md)
- [Tower BFT](https://docs.gridplus.io/blockchain-basics/solana/tower-bft.md)
- [A Transaction's Journey on Solana](https://docs.gridplus.io/blockchain-basics/solana/a-transactions-journey-on-solana.md)
- [Accounts, Sealevel and the SPL](https://docs.gridplus.io/blockchain-basics/solana/accounts-sealevel-and-the-spl.md)