Adds OP_POOL to scripts (#464)

Author: dantudor

src/script/script.cpp

@@ -151,6 +151,8 @@ const char* GetOpName(opcodetype opcode)
 
     case OP_INVALIDOPCODE          : return "OP_INVALIDOPCODE";
 
+    case OP_POOL                   : return "OP_POOL";
+
     // Note:
     //  The template matching params OP_SMALLDATA/etc are defined in opcodetype enum
     //  as kind of implementation hack, they are *NOT* real opcodes.  If found in real
@@ -305,6 +307,13 @@ bool CScript::IsPaymentRequestVoteNo() const
       (*this)[4] == 0x20);
 }
 
+bool CScript::IsPool() const
+{
+    return (this->size() == 2 &&
+      (*this)[0] == OP_RETURN &&
+      (*this)[1] == OP_POOL);
+}
+
 bool CScript::ExtractVote(uint256 &hash, bool &vote) const
 {
     if(!IsPaymentRequestVoteNo() && !IsPaymentRequestVoteYes() && !IsProposalVoteYes()

src/script/script.h

@@ -188,6 +188,8 @@ enum opcodetype
 
     OP_COINSTAKE = 0xc6,
 
+    OP_POOL = 0xd0,
+
     // template matching params
     OP_SMALLDATA = 0xf9,
     OP_SMALLINTEGER = 0xfa,
@@ -689,6 +691,7 @@ class CScript : public CScriptBase
     bool IsPaymentRequestVote() const;
     bool IsPaymentRequestVoteYes() const;
     bool IsPaymentRequestVoteNo() const;
+    bool IsPool() const;
     bool ExtractVote(uint256 &hash, bool &vote) const;
 
     /** Called by IsStandardTx and P2SH/BIP62 VerifyScript (which makes it consensus-critical). */

src/script/standard.cpp

@@ -40,6 +40,7 @@ const char* GetTxnOutputType(txnouttype t)
     case TX_WITNESS_V0_KEYHASH: return "witness_v0_keyhash";
     case TX_WITNESS_V0_SCRIPTHASH: return "witness_v0_scripthash";
     case TX_COLDSTAKING: return "cold_staking";
+    case TX_POOL: return "pool_staking";
     }
     return NULL;
 }
@@ -124,6 +125,12 @@ bool Solver(const CScript& scriptPubKey, txnouttype& typeRet, vector<vector<unsi
         return true;
     }
 
+    if(scriptPubKey.IsPool())
+    {
+        typeRet = TX_POOL;
+        return true;
+    }
+
     int witnessversion;
     std::vector<unsigned char> witnessprogram;
     if (scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) {

src/script/standard.h

@@ -58,7 +58,8 @@ enum txnouttype
     TX_PAYMENTREQUESTYESVOTE,
     TX_PROPOSALNOVOTE,
     TX_PAYMENTREQUESTNOVOTE,
-    TX_COLDSTAKING
+    TX_COLDSTAKING,
+    TX_POOL
 };
 
 class CNoDestination {