Bitcoin Basics
Bitcoin timelocks put a condition on when a spend can become valid
Bitcoin timelocks restrict when a spending transaction can become valid. They do not schedule a guaranteed payment at an exact wall-clock time.
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Bitcoin Basics
Bitcoin Basics
A transaction in a mempool is still waiting for inclusion in a block
A Bitcoin mempool contains transactions a node has accepted but not yet seen in a block. Read pending status separately from confirmation and final payment handling.
Bitcoin Basics
A Bitcoin change output can send the remainder back to your own wallet
Bitcoin spends transaction outputs rather than subtracting from a single account balance. A change output can return the remainder to a wallet-controlled address.