The prioritisetransaction RPC adds virtual priority or fee to a transaction, allowing it to be accepted into blocks mined by this node (or miners which use this node) with a lower priority or fee. (It can also remove virtual priority or fee, requiring the transaction have a higher priority or fee to be accepted into a locally-mined block.)

Parameter #1—the TXID of the transaction to modify

Name Type Presence Description
TXID string Required
(exactly 1)
The TXID of the transaction whose virtual priority or fee you want to modify, encoded as hex in RPC byte order

Parameter #2—the change to make to the virtual priority

Name Type Presence Description
Priority number (real) Required
(exactly 1)
If positive, the priority to add to the transaction in addition to its computed priority; if negative, the priority to subtract from the transaction’s computed priory. Computed priority is the age of each input in days since it was added to the block chain as an output (coinage) times the value of the input in satoshis (value) divided by the size of the serialized transaction (size), which is coinage * value / size

Parameter #3—the change to make to the virtual fee

Name Type Presence Description
Fee number (int) Required
(exactly 1)
Warning: this value is in satoshis, not pai’s

If positive, the virtual fee to add to the actual fee paid by the transaction; if negative, the virtual fee to subtract from the actual fee paid by the transaction. No change is made to the actual fee paid by the transaction

Result—true if the priority is changed

Name Type Presence Description
result bool (true only) Required
(exactly 1)
Always set to true if all three parameters are provided. Will not return an error if the TXID is not in the memory pool. If fewer or more than three arguments are provided, or if something goes wrong, will be set to null


pai-cli -testnet prioritisetransaction \
    fe0165147da737e16f5096ab6c1709825217377a95a882023ed089a89af4cff9 \
    1234 456789



See also

  • GetRawMemPool: returns all transaction identifiers (TXIDs) in the memory pool as a JSON array, or detailed information about each transaction in the memory pool as a JSON object.
  • GetBlockTemplate: gets a block template or proposal for use with mining software.