Add Whitechain Testnet (eip155:1874)

[alexursol2]

Adding a new chain to the Explorer

1. JSON-RPC spec for Wallets – Not required. Whitechain is EVM-compatible and serves the standard Ethereum JSON-RPC API, so the existing spec applies.
   GitHub Link: https://docs.walletconnect.com/2.0/advanced/rpc-reference/ethereum-rpc

2. CASA namespace spec – Not required. The eip155 namespace already exists.
   GitHub Link: https://github.com/ChainAgnostic/namespaces/blob/main/eip155/caip2.md

3. namespaces: eip155

4. chains:

   • eip155:1874 – Whitechain Testnet (a.k.a. Whitechain Sepolia). Label: testnet.

5. RPC endpoints:

   • HTTPS JSON-RPC: https://rpc.testnet.whitechain.io/
   • WebSocket JSON-RPC: wss://[rpc.testnet.whitechain.io/ws](http://rpc.testnet.whitechain.io/ws)

6. SLIP-0044 coin type: 60 (eip155 / EVM standard derivation, m/44'/60'). The native gas token is WBT (WhiteBIT Coin, 18 decimals), which additionally holds its own registered SLIP-0044 index 130822.

References

• Source of RPC endpoints (RPC docs): https://l2docs.whitechain.io/learn/network/reference
• Source of namespace (if non-EIP155) chain information – N/A (EVM / eip155)

Additional context

Whitechain Testnet is a live OP Stack L2 that settles on Ethereum Sepolia (L1 chain 11155111). Native gas token: WBT (WhiteBIT Coin, 18 decimals). Block time: 1s. Block explorer: https://explorer.testnet.whitechain.io/. The chain ships in viem as whitechainSepolia. Chain ID verified live via eth_chainId → 0x752 (1874). Mainnet L2 is not yet live; its Chain ID will be submitted separately once published.

• I have read and understood the above clarification

[linear]

CR-844