A minimal version of BlockAssembler, using the same ancestor set scoring algorithm. Allows us to run this algorithm on a limited set of transactions (e.g. subset of mempool or transactions that are not yet in mempool) instead of the entire mempool, ignoring consensus rules. Callers may use this to: - Calculate the "bump fee" needed to spend an unconfirmed UTXO at a given feerate - "Linearize" a list of transactions to see the order in which they would be selected for inclusion in a block
Declared in <node/mini_miner.h>
class MiniMiner;| Name | Description |
|---|---|
MiniMiner [constructor] | Constructors |
BuildMockTemplate | Build a block template until the target feerate is hit. If target_feerate is not given, builds a block template until all transactions have been selected. |
CalculateBumpFees | Construct a new block template and, for each outpoint corresponding to a transaction that did not make it into the block, calculate the cost of bumping those transactions (and their ancestors) to the minimum feerate. Returns a map from outpoint to bump fee, or an empty map if they cannot be calculated. |
CalculateTotalBumpFees | Construct a new block template and, calculate the cost of bumping all transactions that did not make it into the block to the target feerate. Returns the total bump fee, or std::nullopt if it cannot be calculated. |
GetMockTemplateTxids | Returns set of txids in the block template if one has been constructed. |
IsReadyToCalculate | Returns true if CalculateBumpFees may be called, false if not. |
Linearize | Construct a new block template with all of the transactions and calculate the order in which they are selected. Returns the sequence number (lower = selected earlier) with which each transaction was selected, indexed by txid, or an empty map if it cannot be calculated. |