Add Conflux chain

[iosh]

Adding a new chain to the Explorer
To get a new chain added to the Explorer, you will need to submit the following:

1. JSON-RPC spec for Wallets (only if one doesn't already exist). For more information, please review the Ethereum JSON-RPC API docs.
   GitHub Link:

• https://www.confluxdocs.com/docs/core/build/json-rpc/cfx-namespace

2. Write a CASA namespace spec if not already available for this namespace.
   GitHub Link:
   https://github.com/ChainAgnostic/namespaces/tree/main/conflux
3. namespaces:
   conflux
4. chains:

# conflux mainnet
conflux:cfx

# conflux testnet
conflux:cfxtest

5. RPC endpoints
   https://www.confluxdocs.com/docs/core/conflux_rpcs

6. SLIP-0044 coin type:
   * slip44 coin type used in the namespace
   503

References
To ensure timely processing of your request, please provide the following references:

• Source of RPC endpoints (e.g. RPC docs): [link]
  RPC docs: https://www.confluxdocs.com/docs/core/build/json-rpc/cfx-namespace
• Source of namespace (if non-EIP155) chain information (particularly chainIds): [link]
  caip2: https://github.com/ChainAgnostic/namespaces/blob/main/conflux/caip2.md
  Additional context
  Add any other context here.

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Please note:

Registering a chain with the Explorer does not impact or improve the ability for wallets and dapps to support your chain. It is simply a way for users to discover wallets and dapps that support your chain by:

• Browsing the Chains List
• Filtering results programmatically via the Explorer API

It is still up to wallets and dapps to provide concrete support for your chain once it is listed as part of the Explorer.

• I have read and understood the above clarification

[linear]

CR-528 Add Conflux chain