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bitcoin/doc/release-notes-27609.md

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  • A new RPC, submitpackage, has been added. It can be used to submit a list of raw hex transactions to the mempool to be evaluated as a package using consensus and mempool policy rules. These policies include package CPFP, allowing a child with high fees to bump a parent below the mempool minimum feerate (but not minimum relay feerate).

    • Warning: successful submission does not mean the transactions will propagate throughout the network, as package relay is not supported.

    • Not all features are available. The package is limited to a child with all of its unconfirmed parents, and no parent may spend the output of another parent. Also, package RBF is not supported. Refer to doc/policy/packages.md for more details on package policies and limitations.

    • This RPC is experimental. Its interface may change.