# Blockchain

- [Accounts](/dev-docs/fundamentals/blockchain/accounts.md): Explanation of MAPO Accounts - Their Data Structure and Relationship with Key Pair Cryptography。
- [Transactions](/dev-docs/fundamentals/blockchain/transactions.md): MAPO-Relay-Chain Transactions - How They Work, Their Data Structure, and How to Send Them via Applications.
- [Blocks](/dev-docs/fundamentals/blockchain/blocks.md): Overview of Blocks in MAPO-Relay-Chain - Their Data Structure, Purpose, and How Blocks are Generated
- [Gas](/dev-docs/fundamentals/blockchain/gas.md)
- [MPT Tree](/dev-docs/fundamentals/blockchain/mpt.md): Merkle Patricia Tree Introduction
- [RLP Encoding](/dev-docs/fundamentals/blockchain/rlp.md)
- [Oracle](/dev-docs/fundamentals/blockchain/oracle.md)