Add CrossChainBridge smart contract

src/contracts/CrossChainBridge.h

@@ -0,0 +1,86 @@
+#ifndef CROSSCHAINBRIDGE_H
+#define CROSSCHAINBRIDGE_H
+
+#include "qpi.h"
+
+#define CCB_CONTRACT_INDEX 5
+#define CCB_MAX_VALIDATORS 16
+#define CCB_REPLAY_BUFFER_SIZE 256
+
+struct CROSSCHAINBRIDGE {
+    id contractOwner;
+    uint8 isPaused;
+    uint64 totalLockedQus;
+    uint64 totalBurnedFees;
+    uint64 fixedBridgeFee;
+
+    id validators[CCB_MAX_VALIDATORS];
+    uint32 validatorCount;
+    uint32 requiredSignatures;
+
+    uint64 nonce;
+
+    uint8_32 processedTxHashes[CCB_REPLAY_BUFFER_SIZE];
+    uint32 replayBufferIndex;
+};
+
+struct CCB_LockQus_input {
+    uint8_32 destinationChainAddress;
+    uint32 destinationChainId;
+    uint64 amount;
+};
+
+struct CCB_LockQus_output {
+    uint64 lockTxNonce;
+    uint8 status;
+};
+
+struct CCB_UnlockQus_input {
+    uint8_32 txHash;
+    uint8_32 targetQubicAddress;
+    uint64 amount;
+    uint64 lockTxNonce;
+    uint8 signatures[CCB_MAX_VALIDATORS][64];
+};
+
+struct CCB_UnlockQus_output {
+    uint8 status;
+};
+
+struct CCB_SetPause_input {
+    id caller;
+    uint8 pauseState;
+};
+
+struct CCB_SetPause_output {
+    uint8 status;
+};
+
+struct CCB_SetQuorum_input {
+    id caller;
+    uint32 newRequiredSignatures;
+};
+
+struct CCB_SetQuorum_output {
+    uint8 status;
+};
+
+struct CCB_SetFee_input {
+    id caller;
+    uint64 newFee;
+};
+
+struct CCB_SetFee_output {
+    uint8 status;
+};
+
+struct CCB_GetStateSummary_output {
+    uint64 totalLockedQus;
+    uint64 totalBurnedFees;
+    uint64 nonce;
+    uint32 validatorCount;
+    uint32 requiredSignatures;
+    uint8 isPaused;
+};
+
+#endif // CROSSCHAINBRIDGE_H