Bogdan-Ștefan Neacşu
1ad97adc7c
* Replace expect with error * Move PersistentStorage in separate file * Add in-memory cred manager * Make wasm and mobile build * Unify wasm and mobile cred storage * Network defaults has mainnet default * Add network_details to SDK * Move BandwidthController in its own crate * Move out credential into lib crate * Remove nyxd arg in credential binary * Use acquire cred in sdk * Add example file, in sandbox * Mobile lock file * Update changelog * Clearer builder methods and more documentation for them * Sign only amount, without denom * Toggle credentials mode on when enabled
90 lines
2.9 KiB
Rust
90 lines
2.9 KiB
Rust
// Copyright 2023 - Nym Technologies SA <contact@nymtech.net>
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// SPDX-License-Identifier: Apache-2.0
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use crate::error::BandwidthControllerError;
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use nym_coconut_interface::{Base58, Parameters};
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use nym_credential_storage::storage::Storage;
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use nym_credentials::coconut::bandwidth::{BandwidthVoucher, TOTAL_ATTRIBUTES};
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use nym_credentials::coconut::utils::obtain_aggregate_signature;
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use nym_crypto::asymmetric::{encryption, identity};
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use nym_network_defaults::VOUCHER_INFO;
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use nym_validator_client::nyxd::traits::CoconutBandwidthSigningClient;
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use nym_validator_client::nyxd::traits::DkgQueryClient;
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use nym_validator_client::nyxd::tx::Hash;
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use nym_validator_client::nyxd::Coin;
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use nym_validator_client::CoconutApiClient;
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use rand::rngs::OsRng;
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use state::{KeyPair, State};
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use std::str::FromStr;
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pub mod state;
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pub async fn deposit<C>(client: &C, amount: Coin) -> Result<State, BandwidthControllerError>
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where
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C: CoconutBandwidthSigningClient,
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{
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let mut rng = OsRng;
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let signing_keypair = KeyPair::from(identity::KeyPair::new(&mut rng));
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let encryption_keypair = KeyPair::from(encryption::KeyPair::new(&mut rng));
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let params = Parameters::new(TOTAL_ATTRIBUTES).unwrap();
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let voucher_value = amount.amount.to_string();
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let tx_hash = client
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.deposit(
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amount,
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String::from(VOUCHER_INFO),
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signing_keypair.public_key.clone(),
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encryption_keypair.public_key.clone(),
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None,
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)
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.await?
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.transaction_hash
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.to_string();
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let voucher = BandwidthVoucher::new(
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¶ms,
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voucher_value,
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VOUCHER_INFO.to_string(),
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Hash::from_str(&tx_hash).map_err(|_| BandwidthControllerError::InvalidTxHash)?,
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identity::PrivateKey::from_base58_string(&signing_keypair.private_key)?,
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encryption::PrivateKey::from_base58_string(&encryption_keypair.private_key)?,
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);
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let state = State { voucher, params };
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Ok(state)
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}
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pub async fn get_credential<C: DkgQueryClient + Send + Sync, St: Storage>(
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state: &State,
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client: &C,
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storage: &St,
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) -> Result<(), BandwidthControllerError> {
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let epoch_id = client.get_current_epoch().await?.epoch_id;
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let threshold = client
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.get_current_epoch_threshold()
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.await?
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.ok_or(BandwidthControllerError::NoThreshold)?;
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let coconut_api_clients = CoconutApiClient::all_coconut_api_clients(client, epoch_id).await?;
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let signature = obtain_aggregate_signature(
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&state.params,
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&state.voucher,
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&coconut_api_clients,
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threshold,
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)
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.await?;
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storage
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.insert_coconut_credential(
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state.voucher.get_voucher_value(),
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VOUCHER_INFO.to_string(),
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state.voucher.get_private_attributes()[0].to_bs58(),
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state.voucher.get_private_attributes()[1].to_bs58(),
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signature.to_bs58(),
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epoch_id.to_string(),
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)
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.await?;
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Ok(())
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}
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