feat: add Cosmos SDK WebSocket plugin for 7 chains (Claude)

[bobbythelobster]

Implement generic Tendermint/CometBFT WebSocket subscriber for Cosmos SDK chains.

Chains

axelar, coreum, cosmoshub, mayachain, nym, osmosis, thorchainrune

How it works

• Connects to each chain's Tendermint RPC WebSocket
• Subscribes to all Tx events and filters locally for subscribed addresses
• Parses transfer.sender, transfer.recipient, message.sender, coin_spent.spender, coin_received.receiver
• Reconnects with exponential backoff on connection loss
• Emits subLost on disconnect, update on address match

Made with

Claude Code

Relates to Asana task 1213534410513099