wallet: add gettransaction

wallet/wallet.go

@@ -2464,6 +2464,66 @@ func (w *Wallet) GetTransactions(startBlock, endBlock *BlockIdentifier,
 	return &res, err
 }
 
+// GetTransactionResult returns a transaction in the UnminedTransaction
+// field if it is unmined, or in the MinedTransaction field as a Block
+// structure for a mined transaction.
+type GetTransactionResult struct {
+	MinedTransaction   Block
+	UnminedTransaction TransactionSummary
+}
+
+// GetTransaction returns data of any transaction given its id. A mined
+// transaction is returned in a Block structure which records properties about
+// the block.
+func (w *Wallet) GetTransaction(txHash chainhash.Hash) (*GetTransactionResult,
+	error) {
+
+	var res GetTransactionResult
+	err := walletdb.View(w.db, func(dbtx walletdb.ReadTx) error {
+		txmgrNs := dbtx.ReadBucket(wtxmgrNamespaceKey)
+
+		txDetail, err := w.TxStore.TxDetails(txmgrNs, &txHash)
+		if err != nil {
+			return err
+		}
+
+		// If the transaction was not found we return an error.
+		if txDetail == nil {
+			return fmt.Errorf("can not find the transaction")
+		}
+
+		// Otherwise, we create a summary of the transaction details.
+		summary := makeTxSummary(dbtx, w, txDetail)
+
+		var bestHeight int32
+		var blockHash *chainhash.Hash
+		// If it is a confirmed transaction we set the corresponding
+		// block height and hash.
+		if txDetail.Block.Height != -1 {
+			bestHeight = txDetail.Block.Height
+			blockHash = &txDetail.Block.Hash
+		}
+
+		// Add the transaction details either as confirmed or
+		// unconfirmed to the response.
+		switch blockHash {
+		case nil:
+			res.UnminedTransaction = summary
+		default:
+			res.MinedTransaction = Block{
+				Hash:         blockHash,
+				Height:       bestHeight,
+				Timestamp:    summary.Timestamp,
+				Transactions: []TransactionSummary{summary},
+			}
+		}
+
+		return nil
+	})
+
+	return &res, err
+}
+
 // AccountResult is a single account result for the AccountsResult type.
 type AccountResult struct {
 	waddrmgr.AccountProperties