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I have a smart contract deployed to mainnet. A user has executed a transaction that resulted in a revert failure. How can I debug this transaction to determine what exactly happened that resulted in this failure?
(I have the smart contract source code)
For debugging transaction you can use traceTransaction debugging method that will attempt to run transaction as it was executed in the network. You can get more details from this official documentation: https://github.com/ethereum/go-ethereum/wiki/Management-APIs#debug_tracetransaction
I found this tool and it was quite helpful to me:
