# https://docs.base.org/base-chain/llms.txt

## Base Chain Documentation

> Base is a fast, low-cost Ethereum L2 for building global onchain apps; start here to understand chain concepts, connect to networks, and operate reliably.

## Introduction
- [Chain Overview](https://docs.base.org/base-chain/overview.md) — Start here for Base Chain docs, including concepts, network reference, node operation, APIs, and protocol specifications.

## B20 Token Standard
- [B20 token standard](https://docs.base.org/base-chain/specs/upgrades/beryl/b20/specification/overview.md) — ERC-20-compatible native token standard with policy scopes, roles, memos, pausing, supply caps, and variants
- [Policies & scopes](https://docs.base.org/base-chain/specs/upgrades/beryl/b20/specification/concepts/policies-and-scopes.md) — How B20 token scopes point to PolicyRegistry policy IDs
- [Policy configuration in code](https://docs.base.org/base-chain/specs/upgrades/beryl/b20/specification/implementation/policy-configuration-in-code.md) — Read, audit, create, and bind policies from Solidity
- [Deployment & initCalls encoding](https://docs.base.org/base-chain/specs/upgrades/beryl/b20/specification/implementation/deployment-and-initcalls-encoding.md) — Use B20FactoryLib to deploy and bootstrap tokens atomically
- [B20 constants & addresses](https://docs.base.org/base-chain/specs/upgrades/beryl/b20/specification/reference/constants-and-addresses.md) — Fixed precompile addresses, roles, scopes, variant bytes, and policy IDs

## Core Concepts
- [Transaction Ordering](https://docs.base.org/base-chain/network-information/transaction-ordering.md) — How blocks are ordered on Base
- [Transaction Finality](https://docs.base.org/base-chain/network-information/transaction-finality.md) — Detailed information about transaction finality on Base
- [Throughput and Limits](https://docs.base.org/base-chain/network-information/throughput-and-limits.md) — Gas limits and throughput-related network parameters on Base
- [Network Fees](https://docs.base.org/base-chain/network-information/network-fees.md) — L2 execution and L1 security fees on Base
- [Bridging and Withdrawals](https://docs.base.org/base-chain/network-information/bridging-and-withdrawals.md) — How deposits, standard withdrawals, and faster withdrawal options work on Base

## Node Operators
- [Run a Base Node](https://docs.base.org/base-chain/node-operators/run-a-base-node.md) — Setup and operations guide
- [Performance Tuning](https://docs.base.org/base-chain/node-operators/performance-tuning.md) — Optimize node performance
- [Snapshots](https://docs.base.org/base-chain/node-operators/snapshots.md) — Snapshot sync to speed up initial node setup
- [Troubleshooting](https://docs.base.org/base-chain/node-operators/troubleshooting.md) — Diagnose and fix common node issues

## Network Reference
- [Connecting to Base](https://docs.base.org/base-chain/quickstart/connecting-to-base.md) — Configure providers and clients to read/write on Base
- [Node Providers](https://docs.base.org/base-chain/node-operators/node-providers.md) — RPC node providers for Base
- [Base Contracts](https://docs.base.org/base-chain/network-information/base-contracts.md) — Core contracts and addresses
- [Base-Solana Bridge](https://docs.base.org/base-chain/network-information/base-solana-bridge.md) — Bridge assets between Base and Solana
- [Ecosystem Bridges](https://docs.base.org/base-chain/network-information/ecosystem-bridges.md) — Available bridge providers and routes for moving assets to and from Base
- [Network Faucets](https://docs.base.org/base-chain/network-information/network-faucets.md) — Obtain testnet ETH for Base Sepolia
- [Flashblocks FAQ](https://docs.base.org/base-chain/flashblocks/faq.md) — Frequently asked questions about Flashblocks, including block building, WebSocket data, RPC usage, and node setup
- [Troubleshooting Transactions](https://docs.base.org/base-chain/network-information/troubleshooting-transactions.md) — Diagnose and fix common transaction issues

## API Reference
- [Overview](https://docs.base.org/base-chain/api-reference/rpc-overview.md) — Networks, endpoints, preconfirmation app guidance, request/response format, and full method index
- [Ethereum JSON-RPC API](https://docs.base.org/base-chain/api-reference/ethereum-json-rpc-api/eth_blockNumber.md) — Core Ethereum protocol methods (eth_, net_, web3_)
- [Flashblocks API](https://docs.base.org/base-chain/api-reference/flashblocks-api/flashblocks-api-overview.md) — Flashblocks-specific methods, WebSocket subscriptions, and infrastructure stream schema
- [Debug API](https://docs.base.org/base-chain/api-reference/debug-api/debug_traceTransaction.md) — EVM execution tracing and block replay

## Protocol Specs
- [Overview](https://docs.base.org/base-chain/specs/index.md) — Full Base Chain protocol specification index
- [Protocol Overview](https://docs.base.org/base-chain/specs/protocol/overview.md) — High-level tour of protocol components and user flows
- [Derivation](https://docs.base.org/base-chain/specs/protocol/consensus/derivation.md) — How L2 blocks are deterministically derived from L1 data
- [Execution Engine](https://docs.base.org/base-chain/specs/protocol/execution/index.md) — L2 execution engine configuration and Engine API usage
- [Deposits](https://docs.base.org/base-chain/specs/protocol/bridging/deposits.md) — L1-to-L2 deposit transaction specification
- [Withdrawals](https://docs.base.org/base-chain/specs/protocol/bridging/withdrawals.md) — L2-to-L1 withdrawal specification
- [Proofs](https://docs.base.org/base-chain/specs/protocol/proofs/index.md) — Azul proof system overview
- [Proof Contracts](https://docs.base.org/base-chain/specs/protocol/proofs/contracts.md) — Onchain proof verification and game contracts
- [Proposer](https://docs.base.org/base-chain/specs/protocol/proofs/proposer.md) — Checkpoint proposal service
- [Challenger](https://docs.base.org/base-chain/specs/protocol/proofs/challenger.md) — Invalid proposal detection and dispute service
- [Predeploys](https://docs.base.org/base-chain/specs/protocol/execution/evm/predeploys.md) — System contracts at predetermined addresses
- [Glossary](https://docs.base.org/base-chain/specs/reference/glossary.md) — Protocol terminology and definitions
- [Configurability](https://docs.base.org/base-chain/specs/reference/configurability.md) — Consensus, policy, admin, and sequencer parameters

### Upgrade Specs
- [Azul](https://docs.base.org/base-chain/specs/upgrades/azul/overview.md) — Osaka EVM support and multi-proof system
- [Jovian](https://docs.base.org/base-chain/specs/upgrades/jovian/overview.md) — Configurable minimum base fee and DA footprint scalar
- [Isthmus](https://docs.base.org/base-chain/specs/upgrades/isthmus/overview.md) — Pectra EIPs and operator fee mechanism
- [Holocene](https://docs.base.org/base-chain/specs/upgrades/holocene/overview.md) — Dynamic EIP-1559 parameters and stricter derivation rules
- [Granite](https://docs.base.org/base-chain/specs/upgrades/granite/overview.md) — bn256Pairing precompile restrictions and channel timeout changes
- [Fjord](https://docs.base.org/base-chain/specs/upgrades/fjord/overview.md) — FastLZ L1 fee estimation and brotli channel compression
- [Ecotone](https://docs.base.org/base-chain/specs/upgrades/ecotone/overview.md) — EIP-4844 blob support and Dencun integration
- [Delta](https://docs.base.org/base-chain/specs/upgrades/delta/overview.md) — Span batches for compressed L1 data posting

## Security
- [Report a Vulnerability](https://docs.base.org/base-chain/security/report-vulnerability.md) — Security contact and disclosure
- [Security Council](https://docs.base.org/base-chain/security/security-council.md) — Governance and process overview
- [Avoid Malicious Flags](https://docs.base.org/base-chain/security/avoid-malicious-flags.md) — How to avoid app-blocklist flags

## Builder Codes
- [Builder Codes](https://docs.base.org/apps/builder-codes/builder-codes.md) — Overview of the Builder Codes program
- [App Developers](https://docs.base.org/apps/builder-codes/app-developers.md) — Builder Codes for app developers
- [Wallet Developers](https://docs.base.org/apps/builder-codes/wallet-developers.md) — Builder Codes for wallet developers
- [Agent Developers](https://docs.base.org/apps/builder-codes/agent-developers.md) — Attribute AI agent transactions to your identity on Base