Remove ContractsURL parameter

It's superfluous since we have EthereumURL.

Author: jannikluhn

rolling-shutter/keyperimpl/gnosis/keyper.go

@@ -184,7 +184,7 @@ func NewKeyper(kpr *Keyper, messagingMiddleware *MessagingMiddleware) (*keyper.K
 // keyper set. Otherwise, the syncer will only be initialized once such a keyper set is observed to
 // be added, as only then we will know which eon(s) we are responsible for.
 func (kpr *Keyper) initSequencerSyncer(ctx context.Context) error {
-	client, err := ethclient.DialContext(ctx, kpr.config.Gnosis.Node.ContractsURL)
+	client, err := ethclient.DialContext(ctx, kpr.config.Gnosis.Node.EthereumURL)
 	if err != nil {
 		return errors.Wrap(err, "failed to dial Ethereum execution node")
 	}

rolling-shutter/keyperimpl/snapshot/keyper.go

@@ -43,7 +43,7 @@ func (kpr *Keyper) Start(ctx context.Context, runner service.Runner) error {
 		return errors.Wrap(err, "failed to connect to database")
 	}
 
-	contractsClient, err := ethclient.Dial(kpr.config.Ethereum.ContractsURL)
+	contractsClient, err := ethclient.Dial(kpr.config.Ethereum.EthereumURL)
 	if err != nil {
 		return err
 	}

rolling-shutter/medley/configuration/ethereum.go

@@ -18,7 +18,6 @@ func NewEthnodeConfig() *EthnodeConfig {
 
 type EthnodeConfig struct {
 	PrivateKey    *keys.ECDSAPrivate `shconfig:",required"`
-	ContractsURL  string             `                     comment:"The JSON RPC endpoint where the contracts are accessible"`
 	DeploymentDir string             `                     comment:"Contract source directory"`
 	EthereumURL   string             `                     comment:"The layer 1 JSON RPC endpoint"`
 }
@@ -37,7 +36,6 @@ func (c *EthnodeConfig) Validate() error {
 
 func (c *EthnodeConfig) SetDefaultValues() error {
 	c.EthereumURL = "http://127.0.0.1:8545/"
-	c.ContractsURL = "http://127.0.0.1:8555/"
 	c.DeploymentDir = "./deployments/localhost/"
 	return nil
 }