From a19ae55bd5592c3851116a961b58b98b2fba45ed Mon Sep 17 00:00:00 2001
From: Andrew Ashikhmin <34320705+yperbasis@users.noreply.github.com>
Date: Thu, 8 Feb 2024 20:20:20 +0100
Subject: [PATCH] Schedule Dencun on mainnet (#9409)

Refer to https://github.com/ethereum/EIPs/pull/8173
---
 cl/clparams/config.go          | 2 +-
 core/forkid/forkid_test.go     | 6 ++++--
 params/chainspecs/mainnet.json | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/cl/clparams/config.go b/cl/clparams/config.go
index a15c6e73f06..98b0f6e0362 100644
--- a/cl/clparams/config.go
+++ b/cl/clparams/config.go
@@ -753,7 +753,7 @@ var MainnetBeaconConfig BeaconChainConfig = BeaconChainConfig{
 	CapellaForkVersion:   0x03000000,
 	CapellaForkEpoch:     194048,
 	DenebForkVersion:     0x04000000,
-	DenebForkEpoch:       math.MaxUint64,
+	DenebForkEpoch:       269568,
 
 	// New values introduced in Altair hard fork 1.
 	// Participation flag indices.
diff --git a/core/forkid/forkid_test.go b/core/forkid/forkid_test.go
index 41c52891bf5..4d7feee0233 100644
--- a/core/forkid/forkid_test.go
+++ b/core/forkid/forkid_test.go
@@ -75,8 +75,10 @@ func TestCreation(t *testing.T) {
 				{15049999, 1656586434, ID{Hash: checksumToBytes(0x20c327fc), Next: 15050000}},   // Last Arrow Glacier block
 				{15050000, 1656586444, ID{Hash: checksumToBytes(0xf0afd0e3), Next: 1681338455}}, // First Gray Glacier block
 				{17034869, 1681338443, ID{Hash: checksumToBytes(0xf0afd0e3), Next: 1681338455}}, // Last pre-Shanghai block
-				{17034870, 1681338479, ID{Hash: checksumToBytes(0xdce96c2d), Next: 0}},          // First Shanghai block
-				{19000000, 1700000000, ID{Hash: checksumToBytes(0xdce96c2d), Next: 0}},          // Future Shanghai block (mock)
+				{17034870, 1681338479, ID{Hash: checksumToBytes(0xdce96c2d), Next: 1710338135}}, // First Shanghai block
+				{19428734, 1710338123, ID{Hash: checksumToBytes(0xdce96c2d), Next: 1710338135}}, // Last Shanghai block (approx)
+				{19428735, 1710338135, ID{Hash: checksumToBytes(0x9f3d2254), Next: 0}},          // First Cancun block  (approx)
+				{20000000, 1800000000, ID{Hash: checksumToBytes(0x9f3d2254), Next: 0}},          // Future Cancun block (mock)
 			},
 		},
 		// Goerli test cases
diff --git a/params/chainspecs/mainnet.json b/params/chainspecs/mainnet.json
index 2de0e0b8394..a47bf7f418c 100644
--- a/params/chainspecs/mainnet.json
+++ b/params/chainspecs/mainnet.json
@@ -18,5 +18,6 @@
   "terminalTotalDifficulty": 58750000000000000000000,
   "terminalTotalDifficultyPassed": true,
   "shanghaiTime": 1681338455,
+  "cancunTime": 1710338135,
   "ethash": {}
 }