Add submitSolution to BlockTemplate interface

src/interfaces/mining.h

@@ -49,6 +49,13 @@ public:
      * @return merkle path ordered from the deepest
      */
     virtual std::vector<uint256> getCoinbaseMerklePath() = 0;
+
+    /**
+     * Construct and broadcast the block.
+     *
+     * @returns if the block was processed, independent of block validity
+     */
+    virtual bool submitSolution(uint32_t version, uint32_t timestamp, uint32_t nonce, CMutableTransaction coinbase) = 0;
 };
 
 //! Interface giving clients (RPC, Stratum v2 Template Provider in the future)