1 files changed, 56 insertions, 0 deletions
diff --git a/src/wallet/feebumper.h b/src/wallet/feebumper.h
new file mode 100644
index 0000000000..681f55e4e5
--- /dev/null
+++ b/src/wallet/feebumper.h
@@ -0,0 +1,56 @@
+// Copyright (c) 2017 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_WALLET_FEEBUMPER_H
+#define BITCOIN_WALLET_FEEBUMPER_H
+
+#include <primitives/transaction.h>
+
+class CWallet;
+class uint256;
+
+enum class BumpFeeResult
+{
+    OK,
+    INVALID_ADDRESS_OR_KEY,
+    INVALID_REQUEST,
+    INVALID_PARAMETER,
+    WALLET_ERROR,
+    MISC_ERROR,
+};
+
+class CFeeBumper
+{
+public:
+    CFeeBumper(const CWallet *pWalletIn, const uint256 txidIn, int newConfirmTarget, bool specifiedConfirmTarget, CAmount totalFee, bool newTxReplaceable);
+    BumpFeeResult getResult() const { return currentResult; }
+    const std::vector<std::string>& getErrors() const { return vErrors; }
+    CAmount getOldFee() const { return nOldFee; }
+    CAmount getNewFee() const { return nNewFee; }
+    uint256 getBumpedTxId() const { return bumpedTxid; }
+
+    /* signs the new transaction,
+     * returns false if the tx couldn't be found or if it was
+     * impossible to create the signature(s)
+     */
+    bool signTransaction(CWallet *pWallet);
+
+    /* commits the fee bump,
+     * returns true, in case of CWallet::CommitTransaction was successful
+     * but, eventually sets vErrors if the tx could not be added to the mempool (will try later)
+     * or if the old transaction could not be marked as replaced
+     */
+    bool commit(CWallet *pWalletNonConst);
+
+private:
+    const uint256 txid;
+    uint256 bumpedTxid;
+    CMutableTransaction mtx;
+    std::vector<std::string> vErrors;
+    BumpFeeResult currentResult;
+    CAmount nOldFee;
+    CAmount nNewFee;
+};
+
+#endif // BITCOIN_WALLET_FEEBUMPER_H