feat: support bytes[] as the contract call args (#130)

* Handle bytes[]

* Add test case

services/construction/contract_call_data.go

@@ -16,6 +16,7 @@ package construction
 
 import (
 	"encoding/hex"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"log"
@@ -176,6 +177,24 @@ func encodeMethodArgsStrings(methodID []byte, methodSig string, methodArgs []str
 				copy(value[:], bytes)
 				argData = value
 			}
+		// Note: we must handle "bytes[]" before "bytes" because they both share the same prefix
+		case v == "bytes[]":
+			{
+				var bytesArgs []string
+				if err := json.Unmarshal([]byte(methodArgs[i]), &bytesArgs); err != nil {
+					log.Fatal(err)
+				}
+
+				value := make([][]byte, len(bytesArgs))
+				for j, bytesArg := range bytesArgs {
+					bytes, err := hexutil.Decode(bytesArg)
+					if err != nil {
+						log.Fatal(err)
+					}
+					value[j] = bytes
+				}
+				argData = value
+			}
 		case strings.HasPrefix(v, "bytes"):
 			{
 				// No fixed size set as it would make it an "array" instead

services/construction/contract_call_data_test.go

@@ -56,6 +56,12 @@ func TestConstruction_ContractCallData(t *testing.T) {
 			methodArgs:       []interface{}{"0xabcde12345"},
 			expectedResponse: "0xabcde12345",
 		},
+		// https://sepolia.basescan.org/tx/0x61bca9ade0522b70524ebe3e9b3064572cd22e05cdd67d650ad8657dc0f8a1f4
+		"happy path: bytes array and uint256 ": {
+			methodSig:        "createAccount(bytes[],uint256)",
+			methodArgs:       []interface{}{"[\"0x000000000000000000000000911a81c0a2cd632fd4c45461541bf8973d11870a\",\"0x0000000000000000000000006ecb18183838265968039955f1e8829480db5329\",\"0x0000000000000000000000000bfc799df7e440b7c88cc2454f12c58f8a29d986\"]", "0"},
+			expectedResponse: "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",
+		},
 		"happy path: method sig is NO-METHOD-SIG and args is a list of interface": {
 			methodSig:        NoMethodSig,
 			methodArgs:       []interface{}{"0xaabbcc112233"},