Package Relay
The ability for nodes to relay groups of related transactions together so miners evaluate fees on the package total.
Package relay lets nodes share and evaluate groups of related unconfirmed transactions together. This matters when one transaction has a low fee but a dependent child transaction pays enough to make the combined package attractive to miners.
Package relay improves CPFP fee-bumping and reduces some mempool-pinning problems, but it is relay policy rather than a consensus rule. Support can vary by node software, version, and network conditions, so wallets still need fallback strategies.
Related terms
4 linkedExplore connected entries beyond the alphabetical index.
CPFP
→A fee-bumping technique where a new transaction spends an unconfirmed output and pays a high fee to incentivize miners to include both.
Mempool
→A temporary storage space in a node for pending transactions that have not yet been included in a confirmed block.
Fee Rate
→A fee rate is the transaction fee per unit of size, such as satoshis per vbyte, used to prioritize block inclusion.
Replace By Fee (RBF)
→A Bitcoin node policy (BIP125) allowing an unconfirmed transaction to be replaced by a new one that pays a higher fee.
All terms and definitions may update as the Cryptionary improves.
