![]() Pass the above RLP through a keccak256 function. ![]() The above array of values can now be fed into a rlp.encode function After changing the numbers to Hex and handing values with 0, we can go ahead and remove all the keys listed in Step2 and restructure the array as below: So the value used for gasUsed should be 0x and not 0x0 For elements with value as 0, use 0x and not 0x0Įxample: for block 400000, the value for gasUsed is 0. Convert values with numbers to Hex console.log((gasLimit)) Ĭonsole.log((difficulty)) Remove some of the elements from the above object, keep only those that are inputs into a blockHeader, and reorder it as below: This is the actual output which will be used later to compare the test results with. Hash in the above object refers to the blockHash which we are trying to validate. Each time that happens, a block reward of newly minted coins is given to the successful miner along with any fee payments attached to the transactions they store in the new block.Below are the steps to calculate blockHash, given a blockNumber: ![]() This is effectively like a lottery ticket system, where each new hash is a unique ticket with its own set of numbers.įor example, if we take “coindesk” and change the first letter to make “foindesk,” we get this completely different hash = 5a12a9af1b5794bf6855c15944339d41ff713665e415b5434b8c9f081c61b66aīecause each hash created is random and impossible to predict, it can take millions of guesses – or hashes – before the target is met and a miner wins the right to fill the next block and add it to the blockchain. ![]() Each time the nonce is changed, an entirely new hash is created. More specifically, miners are trying to produce a hash that is lower than or equal to the numeric value of the ‘target’ hash by changing a single value called a ‘nonce’. Before new transactional data can be added to the next block in the chain, miners must compete using their machines to guess a number.
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