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| 1 | +use cosmwasm_std::{ |
| 2 | + to_json_binary, Binary, Coin, DepsMut, Env, IbcChannel, IbcMsg, IbcTimeout, Response, Uint64, |
| 3 | +}; |
| 4 | +use cw2::set_contract_version; |
| 5 | +use cw_storage_plus::Item; |
| 6 | +use cw_utils::nonpayable; |
| 7 | +use mesh_apis::price_feed_api::{PriceFeedApi, PriceResponse}; |
| 8 | + |
| 9 | +use crate::error::ContractError; |
| 10 | +use crate::state::{Config, TradingPair}; |
| 11 | + |
| 12 | +use sylvia::types::{ExecCtx, InstantiateCtx, QueryCtx, SudoCtx}; |
| 13 | +use sylvia::{contract, schemars}; |
| 14 | + |
| 15 | +use cw_band::{Input, OracleRequestPacketData}; |
| 16 | +use mesh_price_feed::{Action, PriceKeeper, Scheduler}; |
| 17 | +use obi::enc::OBIEncode; |
| 18 | + |
| 19 | +// Version info for migration |
| 20 | +const CONTRACT_NAME: &str = env!("CARGO_PKG_NAME"); |
| 21 | +const CONTRACT_VERSION: &str = env!("CARGO_PKG_VERSION"); |
| 22 | + |
| 23 | +pub struct RemotePriceFeedContract { |
| 24 | + pub channel: Item<'static, IbcChannel>, |
| 25 | + pub config: Item<'static, Config>, |
| 26 | + pub trading_pair: Item<'static, TradingPair>, |
| 27 | + pub price_keeper: PriceKeeper, |
| 28 | + pub scheduler: Scheduler<Box<dyn Action<ContractError>>, ContractError>, |
| 29 | +} |
| 30 | + |
| 31 | +impl Default for RemotePriceFeedContract { |
| 32 | + fn default() -> Self { |
| 33 | + Self::new() |
| 34 | + } |
| 35 | +} |
| 36 | + |
| 37 | +#[cfg_attr(not(feature = "library"), sylvia::entry_points)] |
| 38 | +#[contract] |
| 39 | +#[sv::error(ContractError)] |
| 40 | +#[sv::messages(mesh_apis::price_feed_api as PriceFeedApi)] |
| 41 | +impl RemotePriceFeedContract { |
| 42 | + pub fn new() -> Self { |
| 43 | + Self { |
| 44 | + channel: Item::new("channel"), |
| 45 | + config: Item::new("config"), |
| 46 | + trading_pair: Item::new("tpair"), |
| 47 | + price_keeper: PriceKeeper::new(), |
| 48 | + // TODO: the indirection can be removed once Sylvia supports |
| 49 | + // generics. The constructor can then probably be constant. |
| 50 | + // |
| 51 | + // Stable existential types would be even better! |
| 52 | + // https://github.com/rust-lang/rust/issues/63063 |
| 53 | + scheduler: Scheduler::new(Box::new(try_request)), |
| 54 | + } |
| 55 | + } |
| 56 | + |
| 57 | + #[sv::msg(instantiate)] |
| 58 | + pub fn instantiate( |
| 59 | + &self, |
| 60 | + mut ctx: InstantiateCtx, |
| 61 | + trading_pair: TradingPair, |
| 62 | + client_id: String, |
| 63 | + oracle_script_id: Uint64, |
| 64 | + ask_count: Uint64, |
| 65 | + min_count: Uint64, |
| 66 | + fee_limit: Vec<Coin>, |
| 67 | + prepare_gas: Uint64, |
| 68 | + execute_gas: Uint64, |
| 69 | + minimum_sources: u8, |
| 70 | + price_info_ttl_in_secs: u64, |
| 71 | + ) -> Result<Response, ContractError> { |
| 72 | + nonpayable(&ctx.info)?; |
| 73 | + |
| 74 | + set_contract_version(ctx.deps.storage, CONTRACT_NAME, CONTRACT_VERSION)?; |
| 75 | + self.trading_pair.save(ctx.deps.storage, &trading_pair)?; |
| 76 | + self.config.save( |
| 77 | + ctx.deps.storage, |
| 78 | + &Config { |
| 79 | + client_id, |
| 80 | + oracle_script_id, |
| 81 | + ask_count, |
| 82 | + min_count, |
| 83 | + fee_limit, |
| 84 | + prepare_gas, |
| 85 | + execute_gas, |
| 86 | + minimum_sources, |
| 87 | + }, |
| 88 | + )?; |
| 89 | + self.price_keeper |
| 90 | + .init(&mut ctx.deps, price_info_ttl_in_secs)?; |
| 91 | + Ok(Response::new()) |
| 92 | + } |
| 93 | + |
| 94 | + #[sv::msg(exec)] |
| 95 | + pub fn request(&self, ctx: ExecCtx) -> Result<Response, ContractError> { |
| 96 | + let ExecCtx { deps, env, info: _ } = ctx; |
| 97 | + try_request(deps, &env) |
| 98 | + } |
| 99 | +} |
| 100 | + |
| 101 | +impl PriceFeedApi for RemotePriceFeedContract { |
| 102 | + type Error = ContractError; |
| 103 | + // FIXME: make these under a feature flag if we need virtual-staking multitest compatibility |
| 104 | + type ExecC = cosmwasm_std::Empty; |
| 105 | + type QueryC = cosmwasm_std::Empty; |
| 106 | + |
| 107 | + /// Return the price of the foreign token. That is, how many native tokens |
| 108 | + /// are needed to buy one foreign token. |
| 109 | + fn price(&self, ctx: QueryCtx) -> Result<PriceResponse, Self::Error> { |
| 110 | + Ok(self |
| 111 | + .price_keeper |
| 112 | + .price(ctx.deps, &ctx.env) |
| 113 | + .map(|rate| PriceResponse { |
| 114 | + native_per_foreign: rate, |
| 115 | + })?) |
| 116 | + } |
| 117 | + |
| 118 | + fn handle_epoch(&self, ctx: SudoCtx) -> Result<Response, Self::Error> { |
| 119 | + self.scheduler.trigger(ctx.deps, &ctx.env) |
| 120 | + } |
| 121 | +} |
| 122 | + |
| 123 | +// TODO: Possible features |
| 124 | +// - Request fee + Bounty logic to prevent request spam and incentivize relayer |
| 125 | +// - Whitelist who can call update price |
| 126 | +pub fn try_request(deps: DepsMut, env: &Env) -> Result<Response, ContractError> { |
| 127 | + let contract = RemotePriceFeedContract::new(); |
| 128 | + let TradingPair { |
| 129 | + base_asset, |
| 130 | + quote_asset, |
| 131 | + } = contract.trading_pair.load(deps.storage)?; |
| 132 | + let config = contract.config.load(deps.storage)?; |
| 133 | + let channel = contract |
| 134 | + .channel |
| 135 | + .may_load(deps.storage)? |
| 136 | + .ok_or(ContractError::IbcChannelNotOpen)?; |
| 137 | + |
| 138 | + let raw_calldata = Input { |
| 139 | + symbols: vec![base_asset, quote_asset], |
| 140 | + minimum_sources: config.minimum_sources, |
| 141 | + } |
| 142 | + .try_to_vec() |
| 143 | + .map(Binary) |
| 144 | + .map_err(|err| ContractError::CustomError { |
| 145 | + val: err.to_string(), |
| 146 | + })?; |
| 147 | + |
| 148 | + let packet = OracleRequestPacketData { |
| 149 | + client_id: config.client_id, |
| 150 | + oracle_script_id: config.oracle_script_id, |
| 151 | + calldata: raw_calldata, |
| 152 | + ask_count: config.ask_count, |
| 153 | + min_count: config.min_count, |
| 154 | + prepare_gas: config.prepare_gas, |
| 155 | + execute_gas: config.execute_gas, |
| 156 | + fee_limit: config.fee_limit, |
| 157 | + }; |
| 158 | + |
| 159 | + Ok(Response::new().add_message(IbcMsg::SendPacket { |
| 160 | + channel_id: channel.endpoint.channel_id, |
| 161 | + data: to_json_binary(&packet)?, |
| 162 | + timeout: IbcTimeout::with_timestamp(env.block.time.plus_seconds(60)), |
| 163 | + })) |
| 164 | +} |
| 165 | + |
| 166 | +#[cfg(test)] |
| 167 | +mod tests { |
| 168 | + use cosmwasm_std::{ |
| 169 | + testing::{mock_dependencies, mock_env, mock_info}, |
| 170 | + Uint128, Uint64, |
| 171 | + }; |
| 172 | + |
| 173 | + use super::*; |
| 174 | + |
| 175 | + #[test] |
| 176 | + fn instantiation() { |
| 177 | + let mut deps = mock_dependencies(); |
| 178 | + let env = mock_env(); |
| 179 | + let info = mock_info("sender", &[]); |
| 180 | + let contract = RemotePriceFeedContract::new(); |
| 181 | + |
| 182 | + let trading_pair = TradingPair { |
| 183 | + base_asset: "base".to_string(), |
| 184 | + quote_asset: "quote".to_string(), |
| 185 | + }; |
| 186 | + |
| 187 | + contract |
| 188 | + .instantiate( |
| 189 | + InstantiateCtx { |
| 190 | + deps: deps.as_mut(), |
| 191 | + env, |
| 192 | + info, |
| 193 | + }, |
| 194 | + trading_pair, |
| 195 | + "07-tendermint-0".to_string(), |
| 196 | + Uint64::new(1), |
| 197 | + Uint64::new(10), |
| 198 | + Uint64::new(50), |
| 199 | + vec![Coin { |
| 200 | + denom: "uband".to_string(), |
| 201 | + amount: Uint128::new(1), |
| 202 | + }], |
| 203 | + Uint64::new(100000), |
| 204 | + Uint64::new(200000), |
| 205 | + 1, |
| 206 | + 60, |
| 207 | + ) |
| 208 | + .unwrap(); |
| 209 | + } |
| 210 | +} |
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