remove trailing slash in mercury credentials' URLs

core/services/ocr2/plugins/ocr2keeper/evmregistry/v21/registry.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"math/big"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
 
@@ -149,6 +150,9 @@ func NewMercuryConfig(credentials *types.MercuryCredentials, abi abi.ABI) *Mercu
 }
 
 func (c *MercuryConfig) Credentials() *types.MercuryCredentials {
+	// remove the trailing slash from the URL if it exists
+	c.cred.URL = strings.TrimRight(c.cred.URL, "/")
+	c.cred.LegacyURL = strings.TrimRight(c.cred.LegacyURL, "/")
 	return c.cred
 }
 

core/services/ocr2/plugins/ocr2keeper/evmregistry/v21/registry_test.go

@@ -8,14 +8,17 @@ import (
 	"testing"
 	"time"
 
-	types2 "github.com/smartcontractkit/chainlink-automation/pkg/v3/types"
+	"github.com/patrickmn/go-cache"
 
 	"github.com/ethereum/go-ethereum/accounts/abi/bind"
 	"github.com/ethereum/go-ethereum/common"
 	coreTypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/mock"
 
+	types2 "github.com/smartcontractkit/chainlink-automation/pkg/v3/types"
+	"github.com/smartcontractkit/chainlink-common/pkg/types"
+
 	types3 "github.com/smartcontractkit/chainlink/v2/core/chains/evm/headtracker/types"
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/logpoller"
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/logpoller/mocks"
@@ -30,6 +33,54 @@ import (
 	"github.com/smartcontractkit/chainlink/v2/core/services/pg"
 )
 
+func TestCredentials_RemoveTrailingSlash(t *testing.T) {
+	tests := []struct {
+		Name      string
+		URL       string
+		LegacyURL string
+	}{
+		{
+			Name:      "Both have trailing slashes",
+			URL:       "http://example.com/",
+			LegacyURL: "http://legacy.example.com/",
+		},
+		{
+			Name:      "One has trailing slashes",
+			URL:       "http://example.com",
+			LegacyURL: "http://legacy.example.com/",
+		},
+		{
+			Name:      "Neither has trailing slashes",
+			URL:       "http://example.com",
+			LegacyURL: "http://legacy.example.com",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.Name, func(t *testing.T) {
+			mockConfig := &MercuryConfig{
+				cred: &types.MercuryCredentials{
+					URL:       test.URL,
+					LegacyURL: test.LegacyURL,
+					Username:  "user",
+					Password:  "pass",
+				},
+				Abi:              core.StreamsCompatibleABI,
+				AllowListCache:   cache.New(defaultPluginRetryExpiration, cleanupInterval),
+				pluginRetryCache: cache.New(defaultPluginRetryExpiration, cleanupInterval),
+			}
+
+			result := mockConfig.Credentials()
+
+			// Assert that trailing slashes are removed
+			assert.Equal(t, "http://example.com", result.URL)
+			assert.Equal(t, "http://legacy.example.com", result.LegacyURL)
+			assert.Equal(t, "user", result.Username)
+			assert.Equal(t, "pass", result.Password)
+		})
+	}
+}
+
 func TestPollLogs(t *testing.T) {
 	tests := []struct {
 		Name             string