Add inscription softfork consensus rules

src/chain.h

@@ -148,6 +148,7 @@ enum BlockStatus: uint32_t {
     BLOCK_FAILED_MASK        =   BLOCK_FAILED_VALID | BLOCK_FAILED_CHILD,
 
     BLOCK_OPT_WITNESS       =   128, //!< block data in blk*.data was received with a witness-enforcing client
+    BLOCK_OPT_INSCRIBE      =   256, //!< block data in blk*.data was received with an inscribe-enforcing client
 };
 
 /** The block chain is a tree shaped structure starting with the

src/consensus/params.h

@@ -18,6 +18,7 @@ enum DeploymentPos
     DEPLOYMENT_TESTDUMMY,
     DEPLOYMENT_CSV, // Deployment of BIP68, BIP112, and BIP113.
     DEPLOYMENT_SEGWIT, // Deployment of BIP141, BIP143, and BIP147.
+    DEPLOYMENT_INSCRIBE, // Deployment of BIP141, BIP143, and BIP147.
     // NOTE: Also add new deployments to VersionBitsDeploymentInfo in versionbits.cpp
     MAX_VERSION_BITS_DEPLOYMENTS
 };

src/rpc/blockchain.cpp

@@ -1226,6 +1226,7 @@ UniValue getblockchaininfo(const JSONRPCRequest& request)
     softforks.push_back(SoftForkDesc("bip65", 4, tip, consensusParams));
     BIP9SoftForkDescPushBack(bip9_softforks, "csv", consensusParams, Consensus::DEPLOYMENT_CSV);
     BIP9SoftForkDescPushBack(bip9_softforks, "segwit", consensusParams, Consensus::DEPLOYMENT_SEGWIT);
+    BIP9SoftForkDescPushBack(bip9_softforks, "inscribe", consensusParams, Consensus::DEPLOYMENT_INSCRIBE);
     obj.pushKV("softforks",             softforks);
     obj.pushKV("bip9_softforks", bip9_softforks);
     obj.pushKV("warnings", GetWarnings("statusbar"));

src/validation.cpp

@@ -1916,6 +1916,11 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
         flags |= SCRIPT_VERIFY_NULLDUMMY;
     }
 
+    // Start enforcing INSCRIBE rules using versionbits logic.
+    if (IsInscribeEnabled(pindex->pprev, consensus)) {
+        flags |= SCRIPT_VERIFY_INSCRIBE;
+    }
+
     int64_t nTime2 = GetTimeMicros(); nTimeForks += nTime2 - nTime1;
     LogPrint("bench", "    - Fork checks: %.2fms [%.2fs]\n", 0.001 * (nTime2 - nTime1), nTimeForks * 0.000001);
 
@@ -2799,6 +2804,9 @@ bool ReceivedBlockTransactions(const CBlock &block, CValidationState& state, CBl
     if (IsWitnessEnabled(pindexNew->pprev, Params().GetConsensus(pindexNew->nHeight))) {
         pindexNew->nStatus |= BLOCK_OPT_WITNESS;
     }
+    if (IsInscribeEnabled(pindexNew->pprev, Params().GetConsensus(pindexNew->nHeight))) {
+        pindexNew->nStatus |= BLOCK_OPT_INSCRIBE;
+    }
     pindexNew->RaiseValidity(BLOCK_VALID_TRANSACTIONS);
     setDirtyBlockIndex.insert(pindexNew);
 
@@ -3021,6 +3029,12 @@ bool IsWitnessEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& pa
     // return (VersionBitsState(pindexPrev, params, Consensus::DEPLOYMENT_SEGWIT, versionbitscache) == THRESHOLD_ACTIVE);
 }
 
+bool IsInscribeEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& params)
+{
+    LOCK(cs_main);
+    return (VersionBitsState(pindexPrev, params, Consensus::DEPLOYMENT_INSCRIBE, versionbitscache) == THRESHOLD_ACTIVE);
+}
+
 // Compute at which vout of the block's coinbase transaction the witness
 // commitment occurs, or -1 if not found.
 static int GetWitnessCommitmentIndex(const CBlock& block)

src/validation.h

@@ -516,6 +516,9 @@ bool TestBlockValidity(CValidationState& state, const CChainParams& chainparams,
 /** Check whether witness commitments are required for block. */
 bool IsWitnessEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& params);
 
+/** Check whether inscribe commitments are required for block. */
+bool IsInscribeEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& params);
+
 /** When there are blocks in the active chain with missing data, rewind the chainstate and remove them from the block index */
 bool RewindBlockIndex(const CChainParams& params);
 

src/versionbits.cpp

@@ -18,6 +18,10 @@ const struct BIP9DeploymentInfo VersionBitsDeploymentInfo[Consensus::MAX_VERSION
     {
         /*.name =*/ "segwit",
         /*.gbt_force =*/ true,
+    },
+    {
+        /*.name =*/ "inscribe",
+        /*.gbt_force =*/ true,
     }
 };