[wallet] Move maxTxFee to wallet

This commit moves the maxtxfee setting to the wallet. There is only
one minor behavior change:

- an error message in feebumper now refers to -maxtxfee instead of
maxTxFee.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 4cc6973802..008765bccc 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -73,6 +73,12 @@ static const unsigned int DEFAULT_TX_CONFIRM_TARGET = 6;
 static const bool DEFAULT_WALLET_RBF = false;
 static const bool DEFAULT_WALLETBROADCAST = true;
 static const bool DEFAULT_DISABLE_WALLET = false;
+//! -maxtxfee default
+constexpr CAmount DEFAULT_TRANSACTION_MAXFEE{COIN / 10};
+//! Discourage users to set fees higher than this amount (in satoshis) per kB
+constexpr CAmount HIGH_TX_FEE_PER_KB{COIN / 100};
+//! -maxtxfee will warn if called with a higher fee than this amount (in satoshis)
+constexpr CAmount HIGH_MAX_TX_FEE{100 * HIGH_TX_FEE_PER_KB};
 
 //! Pre-calculated constants for input size estimation in *virtual size*
 static constexpr size_t DUMMY_NESTED_P2WPKH_INPUT_SIZE = 91;
@@ -983,6 +989,8 @@ public:
     CFeeRate m_discard_rate{DEFAULT_DISCARD_FEE};
     OutputType m_default_address_type{DEFAULT_ADDRESS_TYPE};
     OutputType m_default_change_type{DEFAULT_CHANGE_TYPE};
+    /** Absolute maximum transaction fee (in satoshis) used by default for the wallet */
+    CAmount m_default_max_tx_fee{DEFAULT_TRANSACTION_MAXFEE};
 
     bool NewKeyPool();
     size_t KeypoolCountExternalKeys() EXCLUSIVE_LOCKS_REQUIRED(cs_wallet);