diff --git a/src/codec/v2/encoder.ts b/src/codec/v2/encoder.ts
index 2af9dd7..5a6bea4 100644
--- a/src/codec/v2/encoder.ts
+++ b/src/codec/v2/encoder.ts
@@ -566,6 +566,9 @@ export function encodeECDSASubquery(
   );
 }
 
+/**
+ * @param bytes An array of bytes32 strings.
+ */
 export function encodeGroth16Subquery(bytes: string[]): string {
   const types = new Array(AxiomV2CircuitConstant.MaxSubqueryInputs).fill("bytes32");
   bytes.forEach(validateBytes32);
diff --git a/src/codec/v2/types.ts b/src/codec/v2/types.ts
index 4adf89f..80341f0 100644
--- a/src/codec/v2/types.ts
+++ b/src/codec/v2/types.ts
@@ -126,6 +126,7 @@ export interface ECDSASubquery extends Subquery {
 }
 
 export interface Groth16Subquery extends Subquery {
+  /// An array of bytes32 strings
   bytes: string[];
 }