Gray Glacier Difficulty Pushback Tests

src/DifficultyTestsFiller/dfGrayGlacier/difficultyGrayGlacierFiller.json

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+{
+    "difficultyGrayGlacier" : 
+    {
+        "_info" : {
+            "comment" : "Difficulty Gray Glacier Combination Check: 100k steps, starting from block pushback number (11,400,000) for GrayGlacier"
+        },
+        "network" : [ "GrayGlacier" ],
+        "blocknumber" : "[11_400_000-15_700_000;100_000]",
+        "timestampDiff" : "[1-90;9]",
+        "parentDifficutly" : ["0x223a2d17232652"],
+        "hasUncles" : [0, 1]
+    }
+}

src/DifficultyTestsFiller/dfGrayGlacier/difficultyGrayGlacierForkBlockFiller.json

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+{
+    "difficultyGrayGlacierForkBlock" : 
+    {
+        "_info" : {
+            "comment" : "Gray Glacier Difficulty Combination Check at Fork Block (15,050,000): Difficulty range start uses current mainnet difficulty, range end uses approximate value with constant 13 second block, 5% uncle rate"
+        },
+        "network" : [ "GrayGlacier" ],
+        "blocknumber" : ["0xe5a510"],
+        "timestampDiff" : "[1-90;9]",
+        "parentDifficutly" : "[0x2509b471781d98-0x150f322c7dafd6036;1000000000000000000]",
+        "hasUncles" : [0, 1]
+    }
+}

src/DifficultyTestsFiller/dfGrayGlacier/difficultyGrayGlacierMinus1Filler.json

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+{
+    "difficultyGrayGlacierMinus1" : 
+    {
+        "_info" : {
+            "comment" : "Difficulty Gray Glacier Combination Check: 100k steps, starting from block pushback number minus 1 (11,399,999) for Gray Glacier"
+        },
+        "network" : [ "GrayGlacier" ],
+        "blocknumber" : "[11_399_999-15_699_999;100_000]",
+        "timestampDiff" : "[1-90;9]",
+        "parentDifficutly" : ["0x223a2d17232652"],
+        "hasUncles" : [0, 1]
+    }
+}

src/DifficultyTestsFiller/dfGrayGlacier/difficultyGrayGlacierTimeDiff1Filler.json

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+{
+    "difficultyGrayGlacierTimeDiff1" : 
+    {
+        "_info" : {
+            "comment" : "Difficulty Gray Glacier Timestamp Difference Combination Check 1: Timestamp differences of 8, 17, 26, ... 908"
+        },
+        "network" : [ "GrayGlacier" ],
+        "blocknumber" : ["15_700_000"],
+        "timestampDiff" : "[8-910;9]",
+        "parentDifficutly" : ["0x223a2d17232652"],
+        "hasUncles" : [0, 1]
+    }
+}

src/DifficultyTestsFiller/dfGrayGlacier/difficultyGrayGlacierTimeDiff2Filler.json

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+{
+    "difficultyGrayGlacierTimeDiff1" : 
+    {
+        "_info" : {
+            "comment" : "Difficulty Gray Glacier Timestamp Difference Combination Check 2: Timestamp differences of 9, 18, 27, ... 909"
+        },
+        "network" : [ "GrayGlacier" ],
+        "blocknumber" : ["15_700_000"],
+        "timestampDiff" : "[9-910;9]",
+        "parentDifficutly" : ["0x223a2d17232652"],
+        "hasUncles" : [0, 1]
+    }
+}