removed nym-api placeholders

nym-api/nym-api-requests/src/coconut/models.rs

@@ -5,7 +5,7 @@ use crate::coconut::helpers::issued_credential_plaintext;
 use cosmrs::AccountId;
 use nym_credentials_interface::{
     hash_to_scalar, Attribute, BlindSignRequest, BlindedSignature, Bytable, CoconutError,
-    CredentialSpendingData, Signature, VerificationKey,
+    CredentialSpendingData, VerificationKey,
 };
 use nym_crypto::asymmetric::identity;
 use serde::{Deserialize, Serialize};

nym-api/src/coconut/api_routes/mod.rs

@@ -100,9 +100,15 @@ pub async fn verify_bandwidth_credential(
     let theta = &credential_data.verify_credential_request;
 
     let voucher_value: u64 = if credential_data.typ.is_voucher() {
-        todo!()
+        credential_data
+            .get_bandwidth_attribute()
+            .ok_or(CoconutError::MissingBandwidthValue)?
+            .parse()
+            .map_err(|source| CoconutError::VoucherValueParsingFailure { source })?
     } else {
-        todo!("return error here")
+        return Err(CoconutError::NotABandwidthVoucher {
+            typ: credential_data.typ,
+        });
     };
 
     // TODO: introduce a check to make sure we haven't already voted for this proposal to prevent DDOS

nym-api/src/coconut/error.rs

@@ -3,6 +3,7 @@
 
 use crate::node_status_api::models::NymApiStorageError;
 use nym_coconut_dkg_common::types::{ChunkIndex, DealingIndex, EpochId};
+use nym_credentials::coconut::bandwidth::CredentialType;
 use nym_crypto::asymmetric::{
     encryption::KeyRecoveryError,
     identity::{Ed25519RecoveryError, SignatureError},
@@ -14,6 +15,7 @@ use rocket::http::{ContentType, Status};
 use rocket::response::Responder;
 use rocket::{response, Request, Response};
 use std::io::Cursor;
+use std::num::ParseIntError;
 use thiserror::Error;
 
 pub type Result<T> = std::result::Result<T, CoconutError>;
@@ -23,6 +25,20 @@ pub enum CoconutError {
     #[error(transparent)]
     IOError(#[from] std::io::Error),
 
+    #[error("the received bandwidth voucher did not contain deposit value")]
+    MissingBandwidthValue,
+
+    #[error(
+        "the received bandwidth credential is not a bandwidth voucher. the encoded type is: {typ}"
+    )]
+    NotABandwidthVoucher { typ: CredentialType },
+
+    #[error("failed to parse the bandwidth voucher value: {source}")]
+    VoucherValueParsingFailure {
+        #[source]
+        source: ParseIntError,
+    },
+
     #[error("coconut api query failure: {0}")]
     CoconutApiError(#[from] CoconutApiError),