Chain¶

Multi-chain support — chain definitions and RPC management. The Chain enum and ChainManager class handle connections to multiple blockchain networks.

Classes¶

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  members:
    - get_config
    - get_web3
    - get_solana
    - list_chains
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  members:
    - is_evm
    - explorer
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Usage¶

Initialize Chain Manager¶

```python from web3_agent_kit import ChainManager, Chain

Use default public RPCs¶

chain_manager = ChainManager(chains=[Chain.ETHEREUM, Chain.BASE, Chain.ARBITRUM])

Use custom RPCs¶

chain_manager = ChainManager( chains=[Chain.ETHEREUM, Chain.BASE], rpcs={ Chain.ETHEREUM: "https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY", Chain.BASE: "https://base-mainnet.g.alchemy.com/v2/YOUR_KEY", }, ) ```

Get Web3 Instance¶

python w3 = chain_manager.get_web3(Chain.BASE) block_number = w3.eth.block_number

List Configured Chains¶

python chains = chain_manager.list_chains() print(chains) # [Chain.ETHEREUM, Chain.BASE, Chain.ARBITRUM]

Supported Chains¶

Chain	Chain ID	Default RPC
`Chain.ETHEREUM`	1	`https://eth.llamarpc.com`
`Chain.BASE`	8453	`https://mainnet.base.org`
`Chain.ARBITRUM`	42161	`https://arb1.arbitrum.io/rpc`
`Chain.OPTIMISM`	10	`https://mainnet.optimism.io`
`Chain.POLYGON`	137	`https://polygon-rpc.com`
`Chain.AVALANCHE`	43114	`https://api.avax.network/ext/bc/C/rpc`
`Chain.BSC`	56	`https://bsc-dataseed1.binance.org`
`Chain.SOLANA`	—	`https://api.mainnet-beta.solana.com`
---
## Block Explorers
Each chain has a default block explorer URL:
```python
config = chain_manager.get_config(Chain.BASE)
print(config.explorer) # https://basescan.org
```