Remove Postgres endpoints

src/index.ts

@@ -17,7 +17,6 @@ import {
 } from "./utils";
 import * as middleware from "./middleware";
 
-import { askBestBlock } from "./services/bestblock";
 import { handleSignedTx } from "./services/signedTransaction";
 import { handlePoolInfo } from "./services/poolInfo";
 import { handleGetAccountState } from "./services/accountState";
@@ -62,7 +61,7 @@ createTransactionOutputView(pool);
 createUtxoFunctions(pool);
 createTransactionUtilityFunctions(pool);
 
-const healthChecker = new HealthChecker(() => askBestBlock(pool));
+const healthChecker = new HealthChecker(() => neo.bestblock.getBestBlock());
 
 const router = express();
 

src/neo4j/bestblock/index.ts

@@ -1,7 +1,40 @@
 import { Driver } from "neo4j-driver";
 import { Request, Response } from "express";
+import { CardanoFrag } from "../../Transactions/types";
+import { UtilEither } from "../../utils";
 
 export const bestblock = (driver: Driver) => ({
+  getBestBlock: async (): Promise<UtilEither<CardanoFrag>> => {
+    const session = driver.session();
+
+    const result = await session.run(`
+    MATCH (b:Block)
+    WITH MAX(ID(b)) as max_block_id
+    
+    MATCH (block:Block)
+    WHERE ID(block) = max_block_id
+    RETURN {
+        epoch: block.epoch,
+        slot: block.epoch_slot,
+        globalSlot: block.slot,
+        hash: block.hash,
+        height: block.number
+    } as block`);
+    const bestBlock = result.records[0].get(0).properties;
+
+    session.close();
+
+    return {
+      kind: "ok",
+      value: {
+        epoch: bestBlock.epoch.toNumber(),
+        slot: bestBlock.slot.toNumber(),
+        globalSlot: bestBlock.globalSlot.toNumber(),
+        hash: bestBlock.hash,
+        height: bestBlock.height.toNumber()
+      } as any
+    };
+  },
   handler: async (_: Request, res: Response) => {
     const cypher = `MATCH (b:Block)
     WITH MAX(ID(b)) as max_block_id