Building production bots on free APIs sounds cool in theory. In practice, you hit walls immediately....
Building production bots on free APIs sounds cool in theory. In practice, you hit walls immediately. Here are the 5 real errors I encountered while building two Ethereum monitoring bots, and exactly how I fixed them.
Error 1: Alchemy Event Listeners Timeout After 5 Minutes
The Problem:
I started monitoring Aave liquidations using ethers.js event listeners on free-tier Alchemy.
provider.on(filter, (log) => {
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