fix: fromBlock comes as string for the very first fetchEvents round s…

…crewing the batch size. #243 (#248)

src/bridgeState.js

@@ -84,7 +84,7 @@ module.exports = class BridgeState {
       this.web3,
       contracts,
       this.eventsBuffer,
-      genesisBlock
+      parseInt(genesisBlock, 10)
     );
     const blockNumber = await this.web3.eth.getBlockNumber();
     await this.eventsSubscription.init();