diff --git a/include/libbolt.h b/include/libbolt.h
index 906e90e..0b74c8f 100644
--- a/include/libbolt.h
+++ b/include/libbolt.h
@@ -2,6 +2,7 @@
 #define LIBBOLT_INCLUDE_H_
 
 #include <stdint.h>
+#include <errno.h>
 
 #include "rapidjson/document.h"
 #include "rapidjson/writer.h"
@@ -11,27 +12,34 @@ using namespace rapidjson;
 
 extern "C" {
 
+    // channel init
     char* ffishim_bidirectional_channel_setup(const char *channel_name, unsigned int third_party_support);
     char* ffishim_bidirectional_init_merchant(const char *ser_channel_state, int balance, const char *name_ptr);
     char* ffishim_bidirectional_init_customer(const char *ser_channel_state, const char *ser_channel_token, int balance_customer,  int balance_merchant, const char *name_ptr);
+
+    // channel establish protocol routines
     char* ffishim_bidirectional_establish_customer_generate_proof(const char *ser_channel_token, const char *ser_customer_wallet);
     char* ffishim_bidirectional_establish_merchant_issue_close_token(const char *ser_channel_state, const char *ser_com, const char *ser_com_proof, int init_cust_bal, int init_merch_bal, const char *ser_merch_state);
     char* ffishim_bidirectional_establish_merchant_issue_pay_token(const char *ser_channel_state, const char *ser_com, const char *ser_merch_state);
     char* ffishim_bidirectional_verify_close_token(const char *ser_channel_state, const char *ser_customer_wallet, const char *ser_close_token);
     char* ffishim_bidirectional_establish_customer_final(const char *ser_channel_state, const char *ser_customer_wallet, const char *ser_pay_token);
+
+    // channel pay protocol routines
     char* ffishim_bidirectional_pay_generate_payment_proof(const char *ser_channel_state, const char *ser_customer_wallet, int amount);
     char* ffishim_bidirectional_pay_verify_payment_proof(const char *ser_channel_state, const char *ser_pay_proof, const char *ser_merch_state);
     char* ffishim_bidirectional_pay_generate_revoke_token(const char *ser_channel_state, const char *ser_cust_state, const char *ser_new_cust_state, const char *ser_close_token);
     char* ffishim_bidirectional_pay_verify_revoke_token(const char *ser_revoke_token, const char *ser_merch_state);
     char* ffishim_bidirectional_pay_verify_payment_token(const char *ser_channel_state, const char *ser_cust_state, const char *ser_pay_token);
+
+    // closing routines for both sides
     char* ffishim_bidirectional_customer_close(const char *ser_channel_state, const char *ser_cust_state);
     char* ffishim_bidirectional_merchant_close(const char *ser_channel_state, const char *ser_channel_token, const char *ser_address, const char *ser_cust_close, const char *ser_merch_state);
+
+    // WTP logic for on-chain validation of closing messages
     char* ffishim_bidirectional_wtp_verify_cust_close_message(const char *ser_channel_token, const char *ser_wpk, const char *ser_close_msg, const char *ser_close_token);
     char* ffishim_bidirectional_wtp_verify_merch_close_message(const char *ser_channel_token, const char *ser_wpk, const char *ser_merch_close);
 
     char* ffishim_bidirectional_wtp_check_wpk(const char *wpk);
-//    char* ffishim_bidirectional_wtp_verify_cust_close_message(const char *channel_token, const char *wpk, const char *cust_close, const char *close_token);
-//    char *ffishim_bidirectional_wtp_verify_merch_close_message(const char *channel_token, const char *wpk, const char *merch_close);
 
   const char* string_replace_all(const char* previous_string, char old_char, char new_char)
   {