Update bitcoin checkpoints and defaultAssumeValid (#436)

* update bitcoin checkpoints and defaultAssumeValid

* add hex prefix

* Fix tests

* one more test fix

Author: dangershony

src/Networks/Blockcore.Networks.Bitcoin/BitcoinMain.cs

@@ -95,7 +95,7 @@ public BitcoinMain()
                 bip34Hash: new uint256("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8"),
                 minerConfirmationWindow: 2016, // nPowTargetTimespan / nPowTargetSpacing
                 maxReorgLength: 0,
-                defaultAssumeValid: new uint256("0000000000000000000304dece599f1d046f5c606deec3d1d49eb24b3231b4a3"), // 629000
+                defaultAssumeValid: new uint256("0x00000000000000000003e1d91b245eb32787afb10afe49b61621375361221c38"), // 760000
                 maxMoney: 21000000 * Money.COIN,
                 coinbaseMaturity: 100,
                 premineHeight: 0,
@@ -152,7 +152,8 @@ public BitcoinMain()
                 { 486000, new CheckpointInfo(new uint256("0x000000000000000000a2a8104d61651f76c666b70754d6e9346176385f7afa24"))},
                 { 491800, new CheckpointInfo(new uint256("0x000000000000000000d80de1f855902b50941bc3a3d0f71064d9613fd3943dc4"))},
                 { 550000, new CheckpointInfo(new uint256("0x000000000000000000223b7a2298fb1c6c75fb0efc28a4c56853ff4112ec6bc9"))}, // 14-11-2018,
-                { 610000, new CheckpointInfo(new uint256("0x0000000000000000000a6f607f74db48dae0a94022c10354536394c17672b7f7"))}  // 27-12-2019
+                { 610000, new CheckpointInfo(new uint256("0x0000000000000000000a6f607f74db48dae0a94022c10354536394c17672b7f7"))}, // 27-12-2019
+                { 765000, new CheckpointInfo(new uint256("0x00000000000000000006e35496e6056700db72df0815e38863cad399df7b5373"))}  // 28-11-2022
             };
 
             this.DNSSeeds = new List<DNSSeedData>

src/Tests/Blockcore.Tests/Consensus/CheckpointsTest.cs

@@ -46,7 +46,7 @@ public void GetLastCheckPointHeight_BitcoinMainnet_ReturnsLastCheckPointHeight()
 
             int result = checkpoints.GetLastCheckpointHeight();
 
-            Assert.Equal(610000, result);
+            Assert.Equal(765000, result);
         }
 
         [Fact]
@@ -111,7 +111,7 @@ public void GetLastCheckPointHeight_CheckpointsEnabledAfterLoad_RetrievesCheckpo
             consensusSettings.UseCheckpoints = true;
 
             result = checkpoints.GetLastCheckpointHeight();
-            Assert.Equal(610000, result);
+            Assert.Equal(765000, result);
         }
 
         [Fact]

src/Tests/Blockcore.Tests/NBitcoin/NetworkTests.cs

@@ -78,7 +78,7 @@ public void ReadMagicByteWithFirstByteDuplicated()
         [Fact]
         public void BitcoinMainnetIsInitializedCorrectly()
         {
-            Assert.Equal(17, this.networkMain.Checkpoints.Count);
+            Assert.Equal(18, this.networkMain.Checkpoints.Count);
             Assert.Equal(6, this.networkMain.DNSSeeds.Count);
             Assert.Equal(512, this.networkMain.SeedNodes.Count);
 
@@ -140,7 +140,7 @@ public void BitcoinMainnetIsInitializedCorrectly()
             Assert.Equal(Utils.UnixTimeToDateTime(1510704000), this.networkMain.Consensus.BIP9Deployments[BitcoinBIP9Deployments.Segwit].Timeout);
             Assert.Equal(0, this.networkMain.Consensus.CoinType);
             Assert.False(this.networkMain.Consensus.IsProofOfStake);
-            Assert.Equal(new uint256("0x0000000000000000000304dece599f1d046f5c606deec3d1d49eb24b3231b4a3"), this.networkMain.Consensus.DefaultAssumeValid);
+            Assert.Equal(new uint256("0x00000000000000000003e1d91b245eb32787afb10afe49b61621375361221c38"), this.networkMain.Consensus.DefaultAssumeValid);
             Assert.Equal(100, this.networkMain.Consensus.CoinbaseMaturity);
             Assert.Equal(0, this.networkMain.Consensus.PremineReward);
             Assert.Equal(0, this.networkMain.Consensus.PremineHeight);