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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 ...


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

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