From 8fda4d1e57cd1eef5dc371b6e41019d957350fc9 Mon Sep 17 00:00:00 2001
From: shunmugam <sundaram.blaze@gmail.com>
Date: Thu, 19 Sep 2019 12:10:17 +0530
Subject: [PATCH] Commit - Network hashrate API

---
 server.ts              | 17 ++++++++++++++++-
 server/utils/common.ts | 42 ++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/server.ts b/server.ts
index e382636..7c4ebd1 100644
--- a/server.ts
+++ b/server.ts
@@ -56,7 +56,7 @@ BlockchainOutput
 import { universalGetLatestBlockDetails } from "./server/socket";
 import { dbConfig } from "./server/ormconfig";
 import { config } from "dotenv";
-import {latestBlockDetails, Details, GetBlocktime, averageblockdifficulty} from './server/utils';
+import {latestBlockDetails, Details, GetBlocktime, averageblockdifficulty, network_hashrate} from './server/utils';
 config({ path: resolve(__dirname, "../.env") });
 
 // const connectionManager = getConnectionManager();
@@ -147,6 +147,21 @@ try {
               let data = await averageblockdifficulty();
               result = Number(data);              
         }
+        else if(option == "network-hashrate-cuckoo")
+        {
+          let data = await network_hashrate(blockDetails.block_height,31,blockDetails.targetdifficultycuckatoo);
+          result = data;
+        }
+        else if(option == "network-hashrate-progpow")
+        {
+          let data = await network_hashrate(blockDetails.block_height,16,blockDetails.targetdifficultyprogpow);
+          result = data;
+        }
+        else if(option == "network-hashrate-randomx")
+        {
+          let data = await network_hashrate(blockDetails.block_height,16,blockDetails.targetdifficultyrandomx);
+          result = data;
+        }
         else if(option == "getblockhash")
         {
               let height = req.query.height;
diff --git a/server/utils/common.ts b/server/utils/common.ts
index 32c9c16..f6c7d25 100644
--- a/server/utils/common.ts
+++ b/server/utils/common.ts
@@ -1,4 +1,4 @@
-import { getConnection } from "typeorm";
+import { getConnection, AdvancedConsoleLogger } from "typeorm";
 import { Global } from "../global";
 import { async } from '@angular/core/testing';
 
@@ -362,7 +362,45 @@ const averageblockdifficulty = async() => {
    return BlockchainBlockPerSecondQuery[0]['period'];
 
 }
-         
+
+
+
+
+async function network_hashrate(height, edge_bits, difficulty) {
+  let graph_wight = await graph_weight(height, edge_bits)  
+  return (42.0 * (difficulty / graph_wight) / 60.0);
+ }
+  
+  
+  
+  
+ async function graph_weight(height, edge_bits) {
+      let xpr_edge_bits = edge_bits;
+  
+      let min_edge_bits = 19;
+      if(min_edge_bits == 19) {
+          min_edge_bits += 12;
+      }
+      
+      let bits_over_min =Math.max(0, (edge_bits - min_edge_bits));
+      let expiry_height = (1 << bits_over_min) * 524160;
+  
+      if(height >= expiry_height) {
+         xpr_edge_bits = Math.max(0,(xpr_edge_bits-(1 + (height - expiry_height) / 10080)));
+      }
+  
+    let final_val;
+    if(edge_bits > 24) {
+        final_val  = edge_bits - 24;
+    } else {
+        final_val = 24 - edge_bits;
+    }
+
+    return (2 << final_val)  * xpr_edge_bits;
+}
+
+
+export  {network_hashrate};        
 export  {averageblockdifficulty};
 export  {latestBlockDetails};
 export  {GetBlocktime};