[refactor] Add useful-for-dos "reason" field to CValidationState

This is a first step towards cleaning up our DoS interface - make
validation return *why* something is invalid, and let net_processing
figure out what that implies in terms of banning/disconnection/etc.

Behavior change: peers will now be banned for providing blocks
with premature coinbase spends.

Co-authored-by: Anthony Towns <aj@erisian.com.au>
                Suhas Daftuar <sdaftuar@gmail.com>

1 files changed, 9 insertions, 9 deletions

diff --git a/src/consensus/tx_check.cpp b/src/consensus/tx_check.cpp
index 638f6b808d..3aa6d3ae1f 100644
--- a/src/consensus/tx_check.cpp
+++ b/src/consensus/tx_check.cpp
@@ -11,24 +11,24 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state, bool fChe
 {
     // Basic checks that don't depend on any context
     if (tx.vin.empty())
-        return state.DoS(100, false, REJECT_INVALID, "bad-txns-vin-empty");
+        return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-vin-empty");
     if (tx.vout.empty())
-        return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-empty");
+        return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-vout-empty");
     // Size limits (this doesn't take the witness into account, as that hasn't been checked for malleability)
     if (::GetSerializeSize(tx, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) * WITNESS_SCALE_FACTOR > MAX_BLOCK_WEIGHT)
-        return state.DoS(100, false, REJECT_INVALID, "bad-txns-oversize");
+        return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-oversize");
 
     // Check for negative or overflow output values
     CAmount nValueOut = 0;
     for (const auto& txout : tx.vout)
     {
         if (txout.nValue < 0)
-            return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-negative");
+            return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-vout-negative");
         if (txout.nValue > MAX_MONEY)
-            return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-toolarge");
+            return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-vout-toolarge");
         nValueOut += txout.nValue;
         if (!MoneyRange(nValueOut))
-            return state.DoS(100, false, REJECT_INVALID, "bad-txns-txouttotal-toolarge");
+            return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-txouttotal-toolarge");
     }
 
     // Check for duplicate inputs - note that this check is slow so we skip it in CheckBlock
@@ -37,20 +37,20 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state, bool fChe
         for (const auto& txin : tx.vin)
         {
             if (!vInOutPoints.insert(txin.prevout).second)
-                return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-duplicate");
+                return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-inputs-duplicate");
         }
     }
 
     if (tx.IsCoinBase())
     {
         if (tx.vin[0].scriptSig.size() < 2 || tx.vin[0].scriptSig.size() > 100)
-            return state.DoS(100, false, REJECT_INVALID, "bad-cb-length");
+            return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-cb-length");
     }
     else
     {
         for (const auto& txin : tx.vin)
             if (txin.prevout.IsNull())
-                return state.DoS(100, false, REJECT_INVALID, "bad-txns-prevout-null");
+                return state.DoS(100, ValidationInvalidReason::CONSENSUS, false, REJECT_INVALID, "bad-txns-prevout-null");
     }
 
     return true;