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I am trying to subscribe to log events on ETH mainnet using alchemy provider as explained here

The subscription request returns successful response but I am not receiving any notifications at all

Here is the wscat logs:

wscat -c wss://eth-mainnet.alchemyapi.io/v2/<redacted>
Connected (press CTRL+C to quit)
{"method":"eth_subscribe","params":["logs", {"fromBlock":"latest","toBlock":"latest","address":"<redacted>","topics:["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"]}],"id":1,"jsonrpc":"2.0"}
< {"id":1,"result":"0x646ea02a49d579f15112918d76983131","jsonrpc":"2.0"}

I did some ERC-20 transactions and checked their logs and the address and the topic matches but I get no notifications. Any idea if this works as intended or am I missing something?

1 Answer 1

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For the way you subscribe to the event:

{"method":"eth_subscribe","params":["logs", {"fromBlock":"latest","toBlock":"latest","address":"<redacted>","topics:["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"]}],"id":1,"jsonrpc":"2.0"}

You should remove "fromBlock" and "toBlock": {"method":"eth_subscribe","params":["logs", {"address":"<redacted>","topics:["0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"]}],"id":1,"jsonrpc":"2.0"}

To receive notifications.

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