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eth_subscribe RPC method

The eth_subscribe EVM method is only supported on the Avalanche C-Chain.


  1. subscription name - String - The type of event you want to subscribe to (i.e., newHeads, logs, pendingTransactions, newPendingTransactions). This method supports the following subscription types:
    newPendingTransactions - Returns the hash for all transactions that are added to the pending state and are signed with a key that is available in the node.
    newHeads - Fires a notification each time a new header is appended to the chain, including chain reorganizations.
    logs - Returns logs that are included in new imported blocks and match the given filter criteria.
  2. data - object - (Optional) - Arguments such as an address, multiple addresses, and topics. Note, only logs that are created from these addresses or match the specified topics will return logs.


  1. result - String - Hex encoded subscription ID. This ID will be attached to all received events and can also be used to cancel the subscription using eth_unsubscribe.

Code Examples:

To use the eth_subscribe EVM method on the Avalanche C-Chain, ensure that the end of your URL includes ext/bc/C/rpc.

wscat -c wss:// \ 
# wait for connection 
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