Debug Ethereum Smart Contracts

When a transaction is deployed in Remix IDE, the below steps are followed to debug a transaction:

1. When a transaction is deployed, it gets submitted to the Ethereum blockchain using remix. 
2. There is a debugger button present in the remix IDE. 
3. Press the debugger button which identifies the reasons for the transaction failures. 
4. We have to provide the block number and transaction hash and press the debugger button to start debugging.

Below is the Solidity code to implement the above approach to debug a Solidity smart contract in Remix IDE:

Step 1: Write the code in the remix IDE and compile it using the compile button.

Step 2: After the compilation, deploy the transaction using the deploy button.

Step 3: After the successful deployment the debug button will appear on the right-hand side corner.

Step 4: Expand the line on which debug button is present, you can view the whole transaction details.

Step 5: Press the debug button to start the debugging process.

Ethereum smart contracts are the collection of code and data which is present in the Ethereum blockchain at a well-defined address. It is a block of code that runs on blockchain. It is a program that executes on the Ethereum blockchain. Smart contracts execute automatically. These contracts form the basic blocks of the Ethereum blockchain.

Debugging smart contracts is the process of analyzing the internal work of the transaction sequentially. Debugging allows us to find and fix the errors in the smart contract. Debugging checks the smart contract functions whether generates the desired output. 

Debugger provides the functionality to debug a transaction sequentially to analyze the space, cost, and cost after each step. Debugger finds and fixes the error in the smart contracts. It also checks the functions that perform the specified task.