refactor(core-blockchain): process blocks log line (#3815)

Author: rainydio

__tests__/unit/core-blockchain/blockchain.test.ts

@@ -58,6 +58,7 @@ describe("Blockchain", () => {
         logService.warning = jest.fn();
         logService.info = jest.fn();
         logService.error = jest.fn();
+        logService.debug = jest.fn();
 
         stateStore.started = false;
         stateStore.clearWakeUpTimeout = jest.fn();

packages/core-blockchain/src/blockchain.ts

@@ -354,6 +354,13 @@ export class Blockchain implements Contracts.Blockchain.Blockchain {
      * Process the given block.
      */
     public async processBlocks(blocks: Interfaces.IBlockData[]): Promise<Interfaces.IBlock[] | undefined> {
+        if (blocks.length) {
+            const lastHeight = this.getLastBlock().data.height;
+            const fromHeight = blocks[0].height;
+            const toHeight = blocks[blocks.length - 1].height;
+            this.app.log.debug(`Processing chunk of blocks [${fromHeight}, ${toHeight}] on top of ${lastHeight}`);
+        }
+
         const blockTimeLookup = await Utils.forgingInfoCalculator.getBlockTimeLookup(this.app, blocks[0].height);
 
         const acceptedBlocks: Interfaces.IBlock[] = [];