Add sepolia config.yaml check with eth-clients/sepolia (#14484)

* Add sepolia config.yaml check with eth-clients/sepolia

* Update CHANGELOG.md

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on Keep a Changelog, and this project adheres to Semantic Ve
 - Light client support: Implement `BlockToLightClientHeaderXXX` functions upto Deneb
 - GetBeaconStateV2: add Electra case.
 - Implement [consensus-specs/3875](https://github.com/ethereum/consensus-specs/pull/3875)
+- Tests to ensure sepolia config matches the official upstream yaml
 
 ### Changed
 

WORKSPACE

@@ -342,6 +342,22 @@ filegroup(
     url = "https://github.com/eth-clients/holesky/archive/874c199423ccd180607320c38cbaca05d9a1573a.tar.gz",  # 2024-06-18
 )
 
+http_archive(
+    name = "sepolia_testnet",
+    build_file_content = """
+filegroup(
+    name = "configs",
+    srcs = [
+        "metadata/config.yaml",
+    ],
+    visibility = ["//visibility:public"],
+)
+""",
+    integrity = "sha256-cY/UgpCcYEhQf7JefD65FI8tn/A+rAvKhcm2/qiVdqY=",
+    strip_prefix = "sepolia-f2c219a93c4491cee3d90c18f2f8e82aed850eab",
+    url = "https://github.com/eth-clients/sepolia/archive/f2c219a93c4491cee3d90c18f2f8e82aed850eab.tar.gz",  # 2024-09-19
+)
+
 http_archive(
     name = "com_google_protobuf",
     sha256 = "9bd87b8280ef720d3240514f884e56a712f2218f0d693b48050c836028940a42",

config/params/BUILD.bazel

@@ -49,6 +49,7 @@ go_test(
         "mainnet_config_test.go",
         "testnet_config_test.go",
         "testnet_holesky_config_test.go",
+        "testnet_sepolia_config_test.go",
     ],
     data = glob(["*.yaml"]) + [
         "testdata/e2e_config.yaml",
@@ -57,6 +58,7 @@ go_test(
         "@consensus_spec_tests_minimal//:test_data",
         "@eth2_networks//:configs",
         "@holesky_testnet//:configs",
+        "@sepolia_testnet//:configs",
     ],
     embed = [":go_default_library"],
     gotags = ["develop"],

config/params/testnet_sepolia_config_test.go

@@ -0,0 +1,28 @@
+package params_test
+
+import (
+	"path"
+	"testing"
+
+	"github.com/bazelbuild/rules_go/go/tools/bazel"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+)
+
+func TestSepoliaConfigMatchesUpstreamYaml(t *testing.T) {
+	presetFPs := presetsFilePath(t, "mainnet")
+	mn, err := params.ByName(params.MainnetName)
+	require.NoError(t, err)
+	cfg := mn.Copy()
+	for _, fp := range presetFPs {
+		cfg, err = params.UnmarshalConfigFile(fp, cfg)
+		require.NoError(t, err)
+	}
+	fPath, err := bazel.Runfile("external/sepolia_testnet")
+	require.NoError(t, err)
+	configFP := path.Join(fPath, "metadata", "config.yaml")
+	pcfg, err := params.UnmarshalConfigFile(configFP, nil)
+	require.NoError(t, err)
+	fields := fieldsFromYamls(t, append(presetFPs, configFP))
+	assertYamlFieldsMatch(t, "sepolia", fields, pcfg, params.SepoliaConfig())
+}