reducing e2e eth1lookahead

changelog/james-prysm_reduce-lookahead-e2e.md

@@ -0,0 +1,3 @@
+### Changed
+
+- reduced eth1lookahead value from 8 to 1 since e2e only supports post merge(bellatrix), this will remove the error "Beacon node is not respecting the follow distance. EL client is syncing."

config/params/testdata/e2e_config.yaml

@@ -64,8 +64,9 @@ SECONDS_PER_ETH1_BLOCK: 2 # Override for e2e tests
 MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 1
 # [customized] higher frequency of committee turnover and faster time to acceptable voluntary exit
 SHARD_COMMITTEE_PERIOD: 4 # Override for e2e tests
-# [customized] process deposits more quickly, but insecure
-ETH1_FOLLOW_DISTANCE: 8 # Override for e2e tests
+# [customized] Post-merge, the follow distance is less critical since finality is guaranteed by the beacon chain.
+# Setting to 1 avoids timing issues during e2e startup when the EL has few blocks.
+ETH1_FOLLOW_DISTANCE: 1 # Override for e2e tests
 
 
 # Validator cycle

config/params/testnet_e2e_config.go

@@ -17,7 +17,9 @@ const (
 func E2ETestConfig() *BeaconChainConfig {
 	e2eConfig := MinimalSpecConfig()
 	e2eConfig.DepositContractAddress = "0x4242424242424242424242424242424242424242"
-	e2eConfig.Eth1FollowDistance = 8
+	// Post-merge, the follow distance is less critical since finality is guaranteed by the beacon chain.
+	// Setting to 1 avoids timing issues during e2e startup when the EL has few blocks.
+	e2eConfig.Eth1FollowDistance = 1
 
 	// Misc.
 	e2eConfig.MinGenesisActiveValidatorCount = 256
@@ -73,7 +75,9 @@ func E2ETestConfig() *BeaconChainConfig {
 func E2EMainnetTestConfig() *BeaconChainConfig {
 	e2eConfig := MainnetConfig()
 	e2eConfig.DepositContractAddress = "0x4242424242424242424242424242424242424242"
-	e2eConfig.Eth1FollowDistance = 8
+	// Post-merge, the follow distance is less critical since finality is guaranteed by the beacon chain.
+	// Setting to 1 avoids timing issues during e2e startup when the EL has few blocks.
+	e2eConfig.Eth1FollowDistance = 1
 
 	// Misc.
 	e2eConfig.MinGenesisActiveValidatorCount = 256