5.2. APIs of Cryptocurrency Exchanges

Sometimes a block may be created but gets rejected by other nodes because consensus is not reached. These blocks are referred to as orphan blocks. It is a common occurrence that is caused by two Future Gold wallets staking the next block at almost the same time. The Future Gold wallet works by sending a message to other nodes informing them that you staked the next block. If the other nodes already received a similar message from a different Future Gold wallet earlier, the nodes will reply that it is too late. Your Future Gold wallet will mark the block as an orphan block. You can identify an orphan block on the transaction tab of the Future Gold wallet. They are normally light green as opposed to a darker green and they have a question mark icon beside them indicating that the other nodes did not confirm them on the blockchain. The average occurrence of orphan blocks is around 3%. This is attributed to the short block time.