![]() ![]() To determine difficulty for an upcoming block, we first calculate the time “bucket” that the block belongs to. The Iron Fish difficulty calculation is largely influenced by Ethereum’s difficulty calculation as described in EIP-2, with a few differences. Conversely, if a miner wishes to produce a block in under 55 seconds, the difficulty for a block with that timestamp would be greater than that of the previous block. all the nodes in the network) has not produced a block in over 65 seconds, the difficulty for the upcoming block is decreased (in comparison to the previous block’s difficulty). It is adjusted, if needed, at every block to make it harder or easier for miners to produce blocks such that new blocks are added to the blockchain every 55 to 65 seconds (with an average of 60 seconds). The target time for an Iron Fish block is currently set to 60 seconds. Set the Difficulty and Target for a Block # Difficulty # To incentivize a miner to include such a pending transaction into the block body, transactions include a publicly visible transaction fee that goes to the miner.Ī block with an invalid transaction will be rejected by other nodes - so before including it in the block body, a miner should first verify that transaction (more on transaction verification in the Transaction Creation section). The transactions in the block body have been broadcasted by other peers who want their transactions to be added into the blockchain. Include the miner reward based on the coin emission schedule.The block creation process is the same regardless of whether a block has user-transactions: The block body is simply a list of one or more transactions a block containing no user-transactions is called an empty block. Block Creation #Īs we’ve mentioned, a block consists of a block header and a block body. To be a miner, a node must have both of the global data structures synced (the Merkle Tree of Notes and the Merkle Tree of Nullifiers), and know at least the two most recent blocks. The Iron Fish blockchain algorithm dynamically adjusts the mining difficulty to achieve 60-second average block times, by either increasing or decreasing mining difficulty if previous blocks are observed to be coming in too fast or too slow. A new block is said to be mined when a miner finds a hash of the block header that is below some threshold that we call the target.Miners are those nodes that propose a new block to be added to the blockchain to other nodes.Mining is the core mechanism that defines by which rules new blocks are created, and by which rules a peer can verify and accept an incoming block.Note that we use the terms nodes and peers interchangeably a node in Iron Fish is always a peer. So far, we’ve gone over the structure of the Iron Fish blockchain this section will focus on how the Iron Fish blockchain is expanded with new blocks. ![]()
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