What is 'child-pays-for-parent' (CPFP) in Bitcoin?
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A
A mechanism where mining pools distribute rewards to sub-pool members
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B
A technique where a recipient spends an unconfirmed transaction's output with a high fee to incentivize miners to confirm both
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C
A protocol for parent company wallets to subsidize employee transaction fees
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D
A SegWit feature that batches parent and child transactions together