docs: add documentation

src/handle_provide_parameter.c

@@ -1,6 +1,7 @@
 #include "stakekit_plugin.h"
 
-// Add two hex numbers and save the result in the first number.
+// Adds two 256-bit numbers represented as arrays of uint8_t, 'a' and 'b'.
+// The result of the addition is stored in 'a'.
 static void hex_addition(uint8_t a[INT256_LENGTH], const uint8_t b[INT256_LENGTH]) {
     uint16_t carry = 0;
     for (int i = INT256_LENGTH - 1; i >= 0; i--) {
@@ -286,6 +287,12 @@ static void handle_aave_supply(ethPluginProvideParameter_t *msg, plugin_paramete
     }
 }
 
+// Saves the sum of multiple amounts and 1 recipient in the context.
+// The first param is the owner saved in recipient.
+// The second param is the number of amounts in the amounts[] array
+// The third param is the first amount requested saved in amount_sent.
+// The fourth param is for all the following amounts in the amounts[] array, each time added to
+// amount_sent.
 static void handle_lido_request_withdrawal(ethPluginProvideParameter_t *msg,
                                            plugin_parameters_t *context) {
     switch (context->next_param) {
@@ -331,6 +338,13 @@ static void handle_lido_request_withdrawal(ethPluginProvideParameter_t *msg,
     }
 }
 
+// Saves between 1 and 2 requestIds and hint pairs in the context.
+// The first param is the offset of the _hints[] array saved temporarly in unbound_nonce.
+// The second param is the number of elements in _hints[] array saved in nb_requests.
+// The third param is the first requestId saved in amount_sent.
+// The fourth param is the second requestId saved in contract_address (if any)
+// The fifth param is the first hint saved in amount_received.
+// The sixth param is the second hint saved in recipient (if any)
 static void handle_lido_claim_withdrawal(ethPluginProvideParameter_t *msg,
                                          plugin_parameters_t *context) {
     switch (context->next_param) {

src/handle_query_contract_ui.c

@@ -99,6 +99,8 @@ static void set_send_value_ui(ethQueryContractUI_t *msg, plugin_parameters_t *co
     PRINTF("AMOUNT SENT: %s\n", msg->msg);
 }
 
+// Set UI for "Send 2" screen.
+// Each methods sets the title and the message to be displayed on the screen.
 static void set_send_2_ui(ethQueryContractUI_t *msg, plugin_parameters_t *context) {
     switch (context->selectorIndex) {
         case LIDO_CLAIM_WITHDRAWALS:
@@ -152,6 +154,8 @@ static void set_receive_ui(ethQueryContractUI_t *msg, plugin_parameters_t *conte
     PRINTF("AMOUNT RECEIVED: %s\n", msg->msg);
 }
 
+// Set UI for "Receive 2" screen.
+// Each methods sets the title and the message to be displayed on the screen.
 static void set_receive_2_ui(ethQueryContractUI_t *msg, plugin_parameters_t *context) {
     switch (context->selectorIndex) {
         case LIDO_CLAIM_WITHDRAWALS:
@@ -521,6 +525,7 @@ static screens_t get_screen_unstake_claim(ethQueryContractUI_t *msg,
     }
 }
 
+// Set UI for the Angle Protocol Withdraw method.
 static screens_t get_screen_angle_withdraw(ethQueryContractUI_t *msg,
                                            plugin_parameters_t *context __attribute__((unused))) {
     switch (msg->screenIndex) {
@@ -535,6 +540,7 @@ static screens_t get_screen_angle_withdraw(ethQueryContractUI_t *msg,
     }
 }
 
+// Set UI for the Lido ClaimWithdrawals method.
 static screens_t get_screen_lido_claim_withdrawal(ethQueryContractUI_t *msg,
                                                   plugin_parameters_t *context
                                                   __attribute__((unused))) {