eth_subscribe RPC Method

Parameters

subscription name

string

The type of event you want to subscribe to (i.e., newHeads, logs, newPendingTransactions). This method supports the following subscription types:

newHeads

It fires a notification each time a new header is appended to the chain, including chain reorganizations

logs

It returns logs that are included in new imported blocks and match the given filter criteria

newPendingTransactions

It 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

flag

boolean

If true, method will return the full transaction data, otherwise only the transaction hash

data

object

The 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

Returns

result

The 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

Request

1
wscat -c  \ 
2
# wait for connection 
3
{"id":1,"jsonrpc":"2.0","method":"eth_subscribe","params":["newHeads"]}

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