multiple authorities

src/crosschain_authority.cpp

@@ -0,0 +1,72 @@
+#include "cc/eval.h"
+#include "crosschain.h"
+#include "notarisationdb.h"
+
+
+int GetSymbolAuthority(const char* symbol)
+{
+    if (strlen(symbol) >= 5 && strncmp(symbol, "TXSCL", 5) == 0)
+        return CROSSCHAIN_TXSCL;
+    if (strlen(symbol) >= 6 && strncmp(symbol, "STAKED", 6) == 0)
+        return CROSSCHAIN_STAKED;
+    return CROSSCHAIN_KOMODO;
+}
+
+
+bool CheckTxAuthority(const CTransaction &tx, CrosschainAuthority auth)
+{
+    EvalRef eval;
+
+    if (tx.vin.size() < auth.requiredSigs) return false;
+
+    uint8_t seesize[64];
+
+    BOOST_FOREACH(const CTxIn &txIn, tx.vin)
+    {
+        // Get notary pubkey
+        CTransaction tx;
+        uint256 hashBlock;
+        if (!eval->GetTxUnconfirmed(txIn.prevout.hash, tx, hashBlock)) return false;
+        if (tx.vout.size() < txIn.prevout.n) return false;
+        CScript spk = tx.vout[txIn.prevout.n].scriptPubKey;
+        if (spk.size() != 35) return false;
+        const unsigned char *pk = spk.data();
+        if (pk++[0] != 33) return false;
+        if (pk[33] != OP_CHECKSIG) return false;
+
+        // Check it's a notary
+        for (int i=0; i<auth.size; i++) {
+            if (!seesize[i]) {
+                if (memcmp(pk, auth.notaries[i], 33) == 0) {
+                    seesize[i] = 1;
+                    goto found;
+                }
+            }
+        }
+        return false;
+        found:;
+    }
+
+    return true;
+}
+
+
+const char *notaries_STAKED[4][2] =
+{
+    {"alright", "03b4f49a1c22087e0a9dfaa87aef98ef496c544f9f86038f6c9fea4550543a7679"},
+    {"alright", "03b4f49a1c22087e0a9dfaa87aef98ef496c544f9f86038f6c9fea4550543a7679"},
+    {"alright", "03b4f49a1c22087e0a9dfaa87aef98ef496c544f9f86038f6c9fea4550543a7679"},
+    {"alright", "03b4f49a1c22087e0a9dfaa87aef98ef496c544f9f86038f6c9fea4550543a7679"}
+};
+
+
+const CrosschainAuthority auth_STAKED = [&](){
+    CrosschainAuthority auth;
+    auth.size = 4;
+    auth.requiredSigs = 2;
+    for (int n=0; n<auth.size; n++)
+        for (size_t i=0; i<33; i++)
+            sscanf(notaries_STAKED[n][1]+(i*2), "%2hhx", auth.notaries[n]+i);
+    return auth;
+}();
+