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by thesausageking 1885 days ago
That's not how the code works. Wallets have an amount of Bitcoin, but there are no unique identifiers to a Bitcoin. They don't have serial numbers like, say, a US dollar. There is only the transaction history that shows an amount being sent/received between wallets.

But even if Bitcoins had serial numbers, they would still be practically fungible. Dollar bills have serial numbers and 99.99% of the time, dollars are treated as being completely interchangeable (ignoring the corner case of people hanging the first dollar they made on the wall, etc.). If you give a store one, they treat it as if you gave them $1 in value and don't care which specific dollar you gave them.