[BCI-3438] Add the chainwriter to the EVM relayer impl (#13718)

* evm: Add chain writer constructor onto the evm relayer impl

* changeset: Add changeset

.changeset/five-apes-fold.md

@@ -0,0 +1,5 @@
+---
+"chainlink": minor
+---
+
+#internal Added a chain writer constructor onto the evm relayer.

core/services/relay/evm/evm.go

@@ -626,6 +626,15 @@ func newOnChainContractTransmitter(ctx context.Context, lggr logger.Logger, rarg
 	)
 }
 
+func (r *Relayer) NewChainWriter(_ context.Context, config []byte) (commontypes.ChainWriter, error) {
+	var cfg types.ChainWriterConfig
+	if err := json.Unmarshal(config, &cfg); err != nil {
+		return nil, fmt.Errorf("failed to unmarshall chain writer config err: %s", err)
+	}
+
+	return NewChainWriterService(r.lggr, r.chain.Client(), r.chain.TxManager(), r.chain.GasEstimator(), cfg)
+}
+
 func (r *Relayer) NewContractReader(chainReaderConfig []byte) (commontypes.ContractReader, error) {
 	ctx := context.Background()
 	cfg := &types.ChainReaderConfig{}

core/services/relay/evm/write_target.go

@@ -69,9 +69,14 @@ func NewWriteTarget(ctx context.Context, relayer *Relayer, chain legacyevm.Chain
 			},
 		},
 	}
-
 	chainWriterConfig.MaxGasPrice = chain.Config().EVM().GasEstimator().PriceMax()
-	cw, err := NewChainWriterService(lggr.Named("ChainWriter"), chain.Client(), chain.TxManager(), chain.GasEstimator(), chainWriterConfig)
+
+	encodedWriterConfig, err := json.Marshal(chainWriterConfig)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal chainwriter config: %w", err)
+	}
+
+	cw, err := relayer.NewChainWriter(ctx, encodedWriterConfig)
 	if err != nil {
 		return nil, err
 	}