What if a block contains two transactions that spend the same coin?
In my design, not possible. The transaction’s position in the Merkle tree must be the ID of the coin, so you cannot have two transactions in one block that spend the same coin.
What if a block contains two transactions that spend the same coin?
In my design, not possible. The transaction’s position in the Merkle tree must be the ID of the coin, so you cannot have two transactions in one block that spend the same coin.