Every modify into the ledger is cryptographically signed to establish that the individual transferring bitcoins is the particular operator. No you can expend coins two times mainly because as soon as a transaction is recorded inside the ledger, every single node from the network will know about it. The “fiscal” https://how-to-buy-nft-on-opensea27158.blogripley.com/29352475/top-guidelines-of-bitcoin-functionality