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TL;DR: Unconfirmed transactions are relayed only once. If you were not online, you will only learn about the missing transactions when they are included in a block. As you may know, Bitcoin employs a gossip protocol to relay transaction and block information. When a new transaction gets submitted to the network, the spender wallet will announce it to its ...


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Such Transactions cannot be proceeded without output from their parents. Hence they are also removed from the mempool


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