I can't find a mining reward transaction hash for a given block. I can see the block hash, all the transactions inside the block, etc. But the mining reward transaction is not listed among the details.

Does a mining reward transaction have a hash? Does it have inputs and outputs? I tried different block explorer sites and JavaScript web3 functions. What kind of transaction is a mining reward? How is it implemented?

2 Answers 2


There are no inputs and outputs in Ethereum, just state changes and balances. Therefore, mining rewards don't have a transaction hash since they are not a transaction.

Each block contains the miner's address, and when the block is published, the miner just gets 5 more Ether added to their balance, without the need for a transaction.

See this question for more about UTXOs vs Balances


Here you can find the code increasing miner's balance with reward amount without any TX being created: https://github.com/ethereum/go-ethereum/blob/v1.9.10/consensus/ethash/consensus.go#L638

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.