revamped BandwidthVoucher to allow for different kinds of bandwidth credentials

common/bandwidth-controller/src/utils.rs

@@ -0,0 +1,41 @@
+// Copyright 2024 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+use crate::error::BandwidthControllerError;
+use nym_credential_storage::models::StoredIssuedCredential;
+use nym_credentials::coconut::bandwidth::IssuedBandwidthCredential;
+use nym_validator_client::nym_api::EpochId;
+
+pub fn stored_credential_to_issued_bandwidth(
+    cred: StoredIssuedCredential,
+) -> Result<IssuedBandwidthCredential, BandwidthControllerError> {
+    /*
+       let bandwidth_credential = self
+           .storage
+           .get_next_coconut_credential()
+           .await
+           .map_err(|err| BandwidthControllerError::CredentialStorageError(Box::new(err)))?;
+       let voucher_value = u64::from_str(&bandwidth_credential.voucher_value)
+           .map_err(|_| StorageError::InconsistentData)?;
+       let voucher_info = bandwidth_credential.voucher_info.clone();
+       let serial_number = Zeroizing::new(nym_coconut_interface::Attribute::try_from_bs58(
+           bandwidth_credential.serial_number,
+       )?);
+       let binding_number = Zeroizing::new(nym_coconut_interface::Attribute::try_from_bs58(
+           bandwidth_credential.binding_number,
+       )?);
+       let signature =
+           nym_coconut_interface::Signature::try_from_bs58(bandwidth_credential.signature)?;
+       let epoch_id = u64::from_str(&bandwidth_credential.epoch_id)
+           .map_err(|_| StorageError::InconsistentData)?;
+
+    */
+    todo!()
+}
+
+pub fn issued_bandwidth_to_stored_credential(
+    issued: IssuedBandwidthCredential,
+    epoch_id: EpochId,
+) -> StoredIssuedCredential {
+    todo!()
+}