diff --git a/pkg/solana/chainreader/chain_reader_test.go b/pkg/solana/chainreader/chain_reader_test.go
index cf1e012db..fa2acfdbe 100644
--- a/pkg/solana/chainreader/chain_reader_test.go
+++ b/pkg/solana/chainreader/chain_reader_test.go
@@ -285,11 +285,11 @@ func TestSolanaChainReaderService_GetLatestValue(t *testing.T) {
 				Seeds: []codec.IdlField{
 					{
 						Name: PDAPubKeySeedName,
-						Type: codec.IdlType{AsString: codec.IdlTypePublicKey},
+						Type: codec.NewIdlStringType(codec.IdlTypePublicKey),
 					},
 					{
 						Name: PDAUint64SeedName,
-						Type: codec.IdlType{AsString: codec.IdlTypeU64},
+						Type: codec.NewIdlStringType(codec.IdlTypeU64),
 					},
 				},
 			},
@@ -354,7 +354,7 @@ func TestSolanaChainReaderService_GetLatestValue(t *testing.T) {
 				Seeds: []codec.IdlField{
 					{
 						Name: PDAPubKeySeedName,
-						Type: codec.IdlType{AsString: codec.IdlTypePublicKey},
+						Type: codec.NewIdlStringType(codec.IdlTypePublicKey),
 					},
 				},
 			},
diff --git a/pkg/solana/codec/anchoridl.go b/pkg/solana/codec/anchoridl.go
index 1bae2288b..cde61e3e3 100644
--- a/pkg/solana/codec/anchoridl.go
+++ b/pkg/solana/codec/anchoridl.go
@@ -202,7 +202,7 @@ func (env *IdlType) UnmarshalJSON(data []byte) error {
 
 	switch v := temp.(type) {
 	case string:
-		env.AsString = IdlTypeAsString(v)
+		env.asString = IdlTypeAsString(v)
 	case map[string]interface{}:
 		if len(v) == 0 {
 			return nil
@@ -255,15 +255,21 @@ func (env *IdlType) UnmarshalJSON(data []byte) error {
 
 // Wrapper type:
 type IdlType struct {
-	AsString         IdlTypeAsString
+	asString         IdlTypeAsString
 	asIdlTypeVec     *IdlTypeVec
 	asIdlTypeOption  *IdlTypeOption
 	asIdlTypeDefined *IdlTypeDefined
 	asIdlTypeArray   *IdlTypeArray
 }
 
+func NewIdlStringType(asString IdlTypeAsString) IdlType {
+	return IdlType{
+		asString: asString,
+	}
+}
+
 func (env *IdlType) IsString() bool {
-	return env.AsString != ""
+	return env.asString != ""
 }
 func (env *IdlType) IsIdlTypeVec() bool {
 	return env.asIdlTypeVec != nil
@@ -280,7 +286,7 @@ func (env *IdlType) IsArray() bool {
 
 // Getters:
 func (env *IdlType) GetString() IdlTypeAsString {
-	return env.AsString
+	return env.asString
 }
 func (env *IdlType) GetIdlTypeVec() *IdlTypeVec {
 	return env.asIdlTypeVec