Method Detail

• blockHeader

   abstract Header blockHeader(ULong height)

  Gets the block header for height height.

• blockHeadersPop

   abstract HeaderNotification blockHeadersPop()

  Tries to pop one queued notification for a new block header that we might have received. Returns None if there are no items in the queue.

• blockHeadersSubscribe

   abstract HeaderNotification blockHeadersSubscribe()

  Subscribes to notifications for new block headers, by sending a blockchain.headers.subscribe call.

• estimateFee

   abstract Double estimateFee(ULong number)

  Estimates the fee required in bitcoin per kilobyte to confirm a transaction in number blocks.

• fetchTx

   abstract Transaction fetchTx(Txid txid)

  Fetch transaction of given Txid.

  If it hits the cache it will return the cached version and avoid making the request.

• fullScan

   abstract Update fullScan(FullScanRequest request, ULong stopGap, ULong batchSize, Boolean fetchPrevTxouts)

  Full scan the keychain scripts specified with the blockchain (via an Electrum client) and returns updates for bdk_chain data structures.

  • request: struct with data required to perform a spk-based blockchain client full scan, see FullScanRequest.

  • stop_gap: the full scan for each keychain stops after a gap of script pubkeys with no associated transactions.

  • batch_size: specifies the max number of script pubkeys to request for in a single batch request.

  • fetch_prev_txouts: specifies whether we want previous TxOuts for fee calculation. Note that this requires additional calls to the Electrum server, but is necessary for calculating the fee on a transaction if your wallet does not own the inputs. Methods like Wallet.calculate_fee and Wallet.calculate_fee_rate will return a CalculateFeeError::MissingTxOut error if those TxOuts are not present in the transaction graph.

• ping

   abstract Unit ping()

  Pings the server.

• relayFee

   abstract Double relayFee()

  Returns the minimum accepted fee by the server’s node in Bitcoin, not Satoshi.

• serverFeatures

   abstract ServerFeaturesRes serverFeatures()

  Returns the capabilities of the server.

• sync

   abstract Update sync(SyncRequest request, ULong batchSize, Boolean fetchPrevTxouts)

  Sync a set of scripts with the blockchain (via an Electrum client) for the data specified and returns updates for bdk_chain data structures.

  • request: struct with data required to perform a spk-based blockchain client sync, see SyncRequest.

  • batch_size: specifies the max number of script pubkeys to request for in a single batch request.

  • fetch_prev_txouts: specifies whether we want previous TxOuts for fee calculation. Note that this requires additional calls to the Electrum server, but is necessary for calculating the fee on a transaction if your wallet does not own the inputs. Methods like Wallet.calculate_fee and Wallet.calculate_fee_rate will return a CalculateFeeError::MissingTxOut error if those TxOuts are not present in the transaction graph.

  If the scripts to sync are unknown, such as when restoring or importing a keychain that may include scripts that have been used, use full_scan with the keychain.

• transactionBroadcast

   abstract Txid transactionBroadcast(Transaction tx)

  Broadcasts a transaction to the network.

• transactionGetRaw

   abstract ByteArray transactionGetRaw(Txid txid)

  Gets the raw bytes of a transaction with txid. Returns an error if not found.