Descendant / Child Transaction
Transactions● Common
A transaction spending an output from an unconfirmed parent transaction. Forms dependency chains in the mempool. Mempool policies limit ancestor and descendant counts to prevent DoS.
Technical Notes
Bitcoin Core limits: 25 ancestor/descendant transactions, 101 kvB total size. Package considered for mining together. CPFP requires high-fee child to bump low-fee parent. Cluster mempool redesigns these limits.
Metadata
Visibility: Public
Created:1/3/2026by System