Mobile wallets don’t store data for the entire blockchain. How can you confirm that a transfer has actually been included in a block?
First, what it is: To prove that a transaction is in a particular block, you only need a few hashes along the path from that transaction to the Merkle root. The number of hashes grows logarithmically with the number of transactions.
The principle: The advantage of a Merkle tree is that a single, very short root hash can “lock in” a large number of transactions, and any alteration will be exposed.
The header of every $BTC block stores a Merkle root corresponding to all the transactions in that block.
There’s no shame in playing it safe. Staying in the game matters far more than how much you make on any one occasion.
First, what it is: To prove that a transaction is in a particular block, you only need a few hashes along the path from that transaction to the Merkle root. The number of hashes grows logarithmically with the number of transactions.
The principle: The advantage of a Merkle tree is that a single, very short root hash can “lock in” a large number of transactions, and any alteration will be exposed.
The header of every $BTC block stores a Merkle root corresponding to all the transactions in that block.
There’s no shame in playing it safe. Staying in the game matters far more than how much you make on any one occasion.
