Add sane fallback for fee estimation

Add new commandline option "-fallbackfee" to use when fee estimation does not have sufficient data.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 53a2b96690..ce57f4dae1 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -41,6 +41,8 @@ static const unsigned int DEFAULT_KEYPOOL_SIZE = 100;
 static const CAmount DEFAULT_TRANSACTION_FEE = 0;
 //! -paytxfee will warn if called with a higher fee than this amount (in satoshis) per KB
 static const CAmount nHighTransactionFeeWarning = 0.01 * COIN;
+//! -fallbackfee default
+static const CAmount DEFAULT_FALLBACK_FEE = 20000;
 //! -mintxfee default
 static const CAmount DEFAULT_TRANSACTION_MINFEE = 1000;
 //! -maxtxfee default
@@ -666,6 +668,7 @@ public:
     bool AddAccountingEntry(const CAccountingEntry&, CWalletDB & pwalletdb);
 
     static CFeeRate minTxFee;
+    static CFeeRate fallbackFee;
     /**
      * Estimate the minimum fee considering user set parameters
      * and the required fee