Overhaul the contract handling system

src/Makefile.am

@@ -75,8 +75,10 @@ GRIDCOIN_CORE_H = \
 	compat.h \
 	compat/byteswap.h \
 	compat/endian.h \
+	contract/cpid.h \
+	contract/message.h \
 	contract/polls.h \
-	contract/contract.h \
+	contract/rain.h \
 	crypter.h \
 	db.h \
     fs.h \
@@ -99,7 +101,9 @@ GRIDCOIN_CORE_H = \
 	neuralnet/accrual/null.h \
 	neuralnet/accrual/research_age.h \
 	neuralnet/accrual/snapshot.h \
+	neuralnet/beacon.h \
 	neuralnet/claim.h \
+	neuralnet/contract.h \
 	neuralnet/cpid.h \
 	neuralnet/magnitude.h \
 	neuralnet/project.h \
@@ -119,7 +123,7 @@ GRIDCOIN_CORE_H = \
     scheduler.h \
 	scraper_net.h \
 	scraper/fwd.h \
-    scraper/http.h \
+	scraper/http.h \
 	scraper/scraper.h \
 	script.h \
 	scrypt.h \
@@ -160,8 +164,10 @@ GRIDCOIN_CORE_CPP = addrdb.cpp \
 	block.cpp \
 	boinc.cpp \
 	checkpoints.cpp \
+	contract/cpid.cpp \
+	contract/message.cpp \
 	contract/polls.cpp \
-	contract/contract.cpp \
+	contract/rain.cpp \
 	crypter.cpp \
 	db.cpp \
     fs.cpp \
@@ -173,7 +179,9 @@ GRIDCOIN_CORE_CPP = addrdb.cpp \
 	logging.cpp \
 	main.cpp \
 	miner.cpp \
+	neuralnet/beacon.cpp \
 	neuralnet/claim.cpp \
+	neuralnet/contract.cpp \
 	neuralnet/cpid.cpp \
 	neuralnet/project.cpp \
 	neuralnet/quorum.cpp \

src/Makefile.test.include

@@ -42,6 +42,7 @@ GRIDCOIN_TESTS =\
   test/multisig_tests.cpp \
   test/netbase_tests.cpp \
   test/neuralnet/claim_tests.cpp \
+  test/neuralnet/contract_tests.cpp \
   test/neuralnet/cpid_tests.cpp \
   test/neuralnet/magnitude_tests.cpp \
   test/neuralnet/project_tests.cpp \

src/appcache.cpp

@@ -18,7 +18,6 @@ namespace
         { "beaconalt", Section::BEACONALT },
         { "global", Section::GLOBAL },
         { "protocol", Section::PROTOCOL },
-        { "trxid", Section::TRXID },
         { "poll", Section::POLL },
         { "vote", Section::VOTE },
         { "scraper", Section::SCRAPER }

src/appcache.h

@@ -10,7 +10,6 @@ enum class Section
     BEACONALT,
     GLOBAL,
     PROTOCOL,
-    TRXID,
     POLL,
     VOTE,
     SCRAPER,

src/beacon.cpp

@@ -6,7 +6,6 @@
 #include "main.h"
 #include "init.h"
 #include "appcache.h"
-#include "contract/contract.h"
 #include "key.h"
 #include "neuralnet/researcher.h"
 #include "neuralnet/quorum.h"

src/contract/cpid.cpp

@@ -0,0 +1,78 @@
+#include "beacon.h"
+#include "contract/cpid.h"
+#include "key.h"
+
+bool VerifyCPIDSignature(
+    const std::string& sCPID,
+    const std::string& sBlockHash,
+    const std::string& sSignature,
+    const std::string& sBeaconPublicKey)
+{
+    CKey key;
+
+    bool valid = key.SetPubKey(ParseHex(sBeaconPublicKey))
+        && key.Verify(
+            Hash(sCPID.begin(), sCPID.end(), sBlockHash.begin(), sBlockHash.end()),
+            DecodeBase64(sSignature.c_str()));
+
+    if (!valid) {
+        LogPrintf(
+            "VerifyCPIDSignature: invalid signature sSignature=%s, cached key=%s",
+            sSignature,
+            sBeaconPublicKey);
+    }
+
+    return valid;
+}
+
+bool VerifyCPIDSignature(
+    const std::string& sCPID,
+    const std::string& sBlockHash,
+    const std::string& sSignature)
+{
+    return VerifyCPIDSignature(
+        sCPID,
+        sBlockHash,
+        sSignature,
+        GetBeaconPublicKey(sCPID, false));
+}
+
+bool SignBlockWithCPID(
+    const std::string& sCPID,
+    const std::string& sBlockHash,
+    std::string& sSignature,
+    std::string& sError,
+    bool bAdvertising)
+{
+    // Check if there is a beacon for this user
+    // If not then return false as GetStoresBeaconPrivateKey grabs from the config
+    if (!HasActiveBeacon(sCPID) && !bAdvertising) {
+        sError = "No active beacon";
+        return false;
+    }
+
+    CKey keyBeacon;
+
+    if (!GetStoredBeaconPrivateKey(sCPID, keyBeacon)) {
+        sError = "No beacon key";
+        return false;
+    }
+
+    std::vector<unsigned char> signature_bytes;
+
+    // Returns the Signature of the CPID+BlockHash message.
+    bool result = keyBeacon.Sign(
+        Hash(sCPID.begin(), sCPID.end(), sBlockHash.begin(), sBlockHash.end()),
+        signature_bytes);
+
+    if (!result) {
+        sError = "Unable to sign message, check private key.";
+        sSignature = "";
+
+        return false;
+    }
+
+    sSignature = EncodeBase64(signature_bytes.data(), signature_bytes.size());
+
+    return true;
+}