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The application uses two types of workers: an auction registry that maintains a list of all auctions and an auction worker for each auction that manages bidding for that auction. + +By sharding the state this way the application can be highly scalable because users only need to interact with the single auction registry when creating new auctions or listing all auctions. Auction listing could also be cached. + +Our auction will not require any database because we can just store the state of the auction registry and each auction with in memory data structures and rely on Golem's durability guarantees. Of course if we had large files like images to go along with our auctions we might still want to use a database. + +To run an auction we first need to upload the templates for our auction worker and auction registry. Let's upload the template for the auction worker first since we will need to provide the template identifier for the auction worker to the auction registry so it can create new auction workers as needed. + +The code for both of our workers are written in Rust, though we code have written them in any language that compiles to WebAssembly ("WASM"). To compile them to WASM we just do: + +```bash +cargo component build --release +``` + +This will create two files, `auction.wasm` and `auction-registry.wasm`, in the `target/wasm32-wasi-release` folder that represent the code for our workers compiled to WASM. Copy them to the current directory so they are easily accessible. + +We can upload the template for the auction worker to Golem like this: + +```bash +golem-cli template add --template-name auction-1 auction.wasm +``` + +This will return some metadata about the template we have just uploaded: + +``` +template_id: 69dd184e-1fef-4925-800c-8a0d91ef2ef3 +template_version: 0 +template_name: auction-1 +template_size: 2143417 +exports: +- 'golem:template/api/initialize(auction: {auction-id: {auction-id: str}, name: str, description: str, limit-price: f32, expiration: u64}) => ' +- 'golem:template/api/bid(bidder-id: {bidder-id: str}, price: f32) => variant(auction-expired: (), price-too-low: (), success: ())' +- 'golem:template/api/close-auction() => {bidder-id: str}?' +``` + +Of particular relevance to us is the `template_id`, which uniquely identifies each worker template. We will need that shortly when we create the auction registry worker so it knows how to create new auction workers as needed. + +You will also notice that the metadata includes the signatures of all the functions that the worker exports. These exported functions represent the public API of our worker and we will use that later to bid on our auction. + +We can upload the template for the auction registry for Golem in the same way: + +```bash +golem-cli template add --template-name auction_registry-1 auction_registry.wasm +``` + +``` +template_id: d4da0a79-a31c-43ca-be6c-2a7fddd9e33e +template_version: 0 +template_name: auction-registry-1 +template_size: 2710063 +exports: +- 'golem:template/api/create-bidder(name: str, address: str) => {bidder-id: str}' +- 'golem:template/api/create-auction(name: str, description: str, limit-price: f32, expiration: u64) => {auction-id: str}' +- 'golem:template/api/get-auctions() => [{auction-id: {auction-id: str}, name: str, description: str, limit-price: f32, expiration: u64}]' +``` + +We're almost ready to create our first worker. We just need one more thing which is our authorization token, which the auction registry will need to have access to in order to create new auction workers on our behalf. + +We can get it like this: + +```bash +golem-cli token list +``` + +This token gives the ability to interact with Golem services on your behalf so be careful sharing it! + +With this we have everything we need to deploy our auction service. We can create our auction registry work like this: + +```bash +golem-cli worker add --template-name auction-registry-1 --worker-name auction-registry -1 --env "GOLEM_AUTHORIZATION_TOKEN"="********-****-****-****-************" --env "AUCTION_TEMPLATE_ID"="69dd184e-1fef-4925-800c-8a0d91ef2ef3" +``` + +``` +workerId: + rawTemplateId: d4da0a79-a31c-43ca-be6c-2a7fddd9e33e + workerName: auction-registry-1 +templateVersionUsed: 0 +``` + +We are using environment variables to provide our auction registry worker with both our authorization token and the identifier for the template of our auction worker. Internally our auction registry worker will be able to use this information to create new auction workers for each new auction we create. + +Since the auction registry will take care of creating new auctions as needed there is nothing else we need to do to deply our application. + +Let's get started by registering as a bidder. We can see from the metadata for the auction registry that `create-bidder` expects two strings representing the bidder's name and address and returns a `bidder-id`: + +```bash +golem-cli worker invoke-and-await --template-name=auction-registry-1 --worker-name=auction-registry-1 --function=golem:template/api/create-bidder --parameters='["Adam", "123 green street"]' +``` + +``` +- bidder-id: a11ff221-d861-42e2-bc49-23b48b722ee3 +``` + +Let's also create an auction. An auction requires an item, a description, a limit price, and an expiration date in seconds since the epoch. + +We'll use an expiration date that correponds to October 12, 2023, about one week in the future as of when this was written. This should be updated to a date that is in the future as of when we create our auction so that we can bid on it. + +```bash +golem-cli worker invoke-and-await --template-name=auction-registry-1 --worker-name=auction-registry-1 --function=golem:template/api/create-auction --parameters='["My first auction", "A simple auction", 100, 1697083549]' +``` + +``` +- auction-id: 6fff4e1c-e7d6-49dc-b60c-2484ab6d7a4c +``` + +This `auction-id` is the key for us to interact with our auction directly. + +Let's try bidding on our auction. We'll first try to enter a bid that is below the limit price: + +```bash +golem-cli worker invoke-and-await --template-name=auction-1 --worker-name=auction-6fff4e1c-e7d6-49dc-b60c-2484ab6d7a4c --function=golem:template/api/bid --parameters='[{ "bidder-id": "a11ff221-d861-42e2-bc49-23b48b722ee3" }, 50]' +``` + +``` +- price-too-low: null +``` + +Our price was too low! 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"src/lib.rs" +crate-type = ["cdylib"] + +[dependencies] +once_cell = "1.17.1" +rand = "0.8.5" +uuid = { version = "1.4.1", features = ["v4", "serde"] } +cargo-component-bindings = { git = "https://github.com/bytecodealliance/cargo-component", rev = "e57d1d1405ed2d76f1f3d8647480dea700379ff8" } +reqwest = { git = "https://github.com/zivergetech/reqwest", branch = "update-aug-2023", features = ["json"] } +serde = { version = "1.0.130", features = ["derive"] } + +[package.metadata.component.target] +path = "wit" + +[package.metadata.component.dependencies] \ No newline at end of file diff --git a/examples/rust/rust-auction/auction-registry/src/auction.rs b/examples/rust/rust-auction/auction-registry/src/auction.rs new file mode 100644 index 0000000..7fa4464 --- /dev/null +++ b/examples/rust/rust-auction/auction-registry/src/auction.rs @@ -0,0 +1,148 @@ +use reqwest::*; +use serde::{Deserialize, Serialize}; +use std::env; + +use crate::model::*; + +pub fn create(auction: Auction) { + create_worker(auction.auction_id.clone()); + let invocation_key = get_invocation_key(auction.auction_id.clone()); + initialize_worker(auction, invocation_key); +} + +fn create_worker(auction_id: AuctionId) { + let client = Client::new(); + let template_id = env::var("AUCTION_TEMPLATE_ID").unwrap(); + let url = format!( + "https://release.api.golem.cloud/v1/templates/{}/workers", + template_id + ); + let body = CreateWorkerBody::new(format!("auction-{}", auction_id.auction_id)); + let token = env::var("GOLEM_AUTHORIZATION_TOKEN").unwrap(); + let response = client + .post(url) + .json(&body) + .header("Authorization", format!("Bearer {}", token)) + .send() + .unwrap(); + assert!(response.status().is_success()); +} + +fn get_invocation_key(auction_id: AuctionId) -> InvocationKey { + let client = Client::new(); + let template_id = env::var("AUCTION_TEMPLATE_ID").unwrap(); + let worker_id = format!("auction-{}", auction_id.auction_id); + let url = format!( + "https://release.api.golem.cloud/v1/templates/{}/workers/{}/key", + template_id, worker_id + ); + let token = env::var("GOLEM_AUTHORIZATION_TOKEN").unwrap(); + let response = client + .post(url) + .header("Authorization", format!("Bearer {}", token)) + .send() + .unwrap(); + assert!(response.status().is_success()); + response.json().unwrap() +} + +fn initialize_worker(auction: Auction, invocation_key: InvocationKey) { + let client = Client::new(); + let template_id = env::var("AUCTION_TEMPLATE_ID").unwrap(); + let worker_id = format!("auction-{}", auction.auction_id.auction_id); + let url = format!("https://release.api.golem.cloud/v1/templates/{}/workers/{}/invoke-and-await", template_id, worker_id); + let body = InitializeWorkerBody::new(auction); + let token = env::var("GOLEM_AUTHORIZATION_TOKEN").unwrap(); + let function = "golem:template/api/initialize"; + let query_params = InitializeWorkerQueryParams::new(invocation_key, function.to_string()); + let response = client + .post(url) + .json(&body) + .header("Authorization", format!("Bearer {}", token)) + .query(&query_params) + .send() + .unwrap(); + assert!(response.status().is_success()); +} + +#[derive(Serialize, Deserialize, Debug)] +struct CreateWorkerBody { + name: String, + args: Vec, + env: Vec>, +} + +impl CreateWorkerBody { + fn new(name: String) -> CreateWorkerBody { + CreateWorkerBody { + name, + args: Vec::new(), + env: Vec::new(), + } + } +} + +#[derive(Serialize, Deserialize, Debug)] +struct InvocationKey { + value: String, +} + +#[derive(Serialize, Deserialize, Debug)] +struct InitializeWorkerBody { + params: Vec, +} + +impl InitializeWorkerBody { + fn new(auction: Auction) -> InitializeWorkerBody { + InitializeWorkerBody { + params: vec!(InitializeWorkerParams { + auction_id: AuctionIdParam::new(auction.auction_id.clone()), + name: auction.name, + description: auction.description, + limit_price: auction.limit_price, + expiration: auction.expiration.deadline.as_secs(), + }), + } + } +} + +#[derive(Serialize, Deserialize, Debug)] +struct InitializeWorkerParams { + #[serde(rename = "auction-id")] + auction_id: AuctionIdParam, + name: String, + description: String, + #[serde(rename = "limit-price")] + limit_price: f32, + expiration: u64, +} + +#[derive(Serialize, Deserialize, Debug)] +struct AuctionIdParam { + #[serde(rename = "auction-id")] + auction_id: String, +} + +impl AuctionIdParam { + fn new(auction_id: AuctionId) -> AuctionIdParam { + AuctionIdParam { + auction_id: auction_id.auction_id.to_string(), + } + } +} + +#[derive(Serialize, Deserialize, Debug)] +struct InitializeWorkerQueryParams { + #[serde(rename = "invocation-key")] + invocation_key: String, + function: String, +} + +impl InitializeWorkerQueryParams { + fn new(invocation_key: InvocationKey, function: String) -> InitializeWorkerQueryParams { + InitializeWorkerQueryParams { + invocation_key: invocation_key.value, + function, + } + } +} diff --git a/examples/rust/rust-auction/auction-registry/src/auction_registry_logic.rs b/examples/rust/rust-auction/auction-registry/src/auction_registry_logic.rs new file mode 100644 index 0000000..ed23dab --- /dev/null +++ b/examples/rust/rust-auction/auction-registry/src/auction_registry_logic.rs @@ -0,0 +1,46 @@ +use std::time::{Duration, SystemTime}; + +use crate::auction; +use crate::model::*; + +pub fn create_bidder(state: &mut State, name: String, address: String) -> BidderId { + let bidder_id = BidderId::new(); + let bidder = Bidder::new(bidder_id.clone(), name, address); + state.bidders.insert(bidder_id.clone(), bidder); + bidder_id +} + +pub fn create_auction( + state: &mut State, + name: String, + description: String, + limit_price: f32, + expiration: Deadline, +) -> AuctionId { + let auction_id = AuctionId::new(); + let auction = Auction::new( + auction_id.clone(), + name, + description, + limit_price, + expiration, + ); + state.items.insert(auction_id.clone(), auction.clone()); + auction::create(auction.clone()); + auction_id +} + +pub fn get_auctions(state: &State) -> Vec { + state + .items + .values() + .filter(|item| item.expiration.deadline > now()) + .cloned() + .collect() +} + +fn now() -> Duration { + SystemTime::now() + .duration_since(SystemTime::UNIX_EPOCH) + .unwrap() +} diff --git a/examples/rust/rust-auction/auction-registry/src/lib.rs b/examples/rust/rust-auction/auction-registry/src/lib.rs new file mode 100644 index 0000000..d895457 --- /dev/null +++ b/examples/rust/rust-auction/auction-registry/src/lib.rs @@ -0,0 +1,64 @@ +mod auction; +mod auction_registry_logic; +mod model; + +cargo_component_bindings::generate!(); + +use bindings::*; +use exports::pack::name::api::{ + Guest, Auction as WitAuction, AuctionId as WitAuctionId, BidderId as WitBidderId, + Deadline as WitDeadline, +}; +use once_cell::sync::Lazy; + +use model::*; + +struct Component; + +struct WitState { + state: Lazy, +} + +static mut STATE: WitState = WitState { + state: Lazy::new(|| State::new()), +}; + +fn with_state(f: impl FnOnce(&mut State) -> T) -> T { + let result = unsafe { f(&mut STATE.state) }; + + return result; +} + +// Here, we declare a Rust implementation of the `Auction` trait. +impl Guest for Component { + fn create_bidder(name: String, address: String) -> WitBidderId { + with_state(|state| auction_registry_logic::create_bidder(state, name, address).into()) + } + + fn create_auction( + name: String, + description: String, + limit_price: f32, + expiration: WitDeadline, + ) -> WitAuctionId { + with_state(|state| { + auction_registry_logic::create_auction( + state, + name, + description, + limit_price, + expiration.into(), + ) + .into() + }) + } + + fn get_auctions() -> Vec { + with_state(|state| { + auction_registry_logic::get_auctions(state) + .into_iter() + .map(|item| item.into()) + .collect() + }) + } +} diff --git a/examples/rust/rust-auction/auction-registry/src/model.rs b/examples/rust/rust-auction/auction-registry/src/model.rs new file mode 100644 index 0000000..afd35ce --- /dev/null +++ b/examples/rust/rust-auction/auction-registry/src/model.rs @@ -0,0 +1,168 @@ +use serde::Serialize; +use std::collections::HashMap; +use std::time::Duration; +use uuid::Uuid; + +use crate::exports::pack::name::api::{ + Auction as WitAuction, AuctionId as WitAuctionId, BidderId as WitBidderId, + Deadline as WitDeadline, +}; + +#[derive(Clone, Eq, Hash, PartialEq, PartialOrd, Ord)] +pub struct BidderId { + pub bidder_id: Uuid, +} + +impl BidderId { + pub fn new() -> Self { + BidderId { + bidder_id: Uuid::new_v4(), + } + } +} + +impl From for BidderId { + fn from(wit_bidder_id: WitBidderId) -> Self { + BidderId { + bidder_id: Uuid::parse_str(&wit_bidder_id.bidder_id).unwrap(), + } + } +} + +impl Into for BidderId { + fn into(self) -> WitBidderId { + WitBidderId { + bidder_id: self.bidder_id.to_string(), + } + } +} + +#[derive(Clone, Eq, Hash, PartialEq, PartialOrd, Ord, Serialize)] +pub struct AuctionId { + pub auction_id: Uuid, +} + +impl AuctionId { + pub fn new() -> Self { + AuctionId { + auction_id: Uuid::new_v4(), + } + } +} + +impl From for AuctionId { + fn from(wit_auction_id: WitAuctionId) -> Self { + AuctionId { + auction_id: Uuid::parse_str(&wit_auction_id.auction_id).unwrap(), + } + } +} + +impl Into for AuctionId { + fn into(self) -> WitAuctionId { + WitAuctionId { + auction_id: self.auction_id.to_string(), + } + } +} + +#[derive(Clone, Serialize)] +pub struct Deadline { + pub deadline: Duration, +} + +impl From for Deadline { + fn from(wit_deadline: WitDeadline) -> Self { + Deadline { + deadline: Duration::from_secs(wit_deadline), + } + } +} + +impl Into for Deadline { + fn into(self) -> WitDeadline { + self.deadline.as_secs() + } +} + +#[derive(Clone, Serialize)] +pub struct Auction { + pub auction_id: AuctionId, + pub name: String, + pub description: String, + pub limit_price: f32, + pub expiration: Deadline, +} + +impl Auction { + pub fn new( + auction_id: AuctionId, + name: String, + description: String, + limit_price: f32, + expiration: Deadline, + ) -> Self { + Auction { + auction_id, + name, + description, + limit_price, + expiration, + } + } +} + +impl From for Auction { + fn from(wit_item: WitAuction) -> Self { + Auction { + auction_id: AuctionId::from(wit_item.auction_id), + name: wit_item.name, + description: wit_item.description, + limit_price: wit_item.limit_price, + expiration: Deadline::from(wit_item.expiration), + } + } +} + +impl Into for Auction { + fn into(self) -> WitAuction { + WitAuction { + auction_id: self.auction_id.into(), + name: self.name, + description: self.description, + limit_price: self.limit_price, + expiration: self.expiration.into(), + } + } +} + +#[allow(dead_code)] +pub struct Bidder { + bidder_id: BidderId, + name: String, + address: String, +} + +impl Bidder { + pub fn new(bidder_id: BidderId, name: String, address: String) -> Self { + Bidder { + bidder_id, + name, + address, + } + } +} + +pub struct State { + pub bidders: HashMap, + pub items: HashMap, +} + +impl State { + pub fn new() -> Self { + State { + bidders: HashMap::new(), + items: HashMap::new(), + } + } +} diff --git a/examples/rust/rust-auction/auction-registry/wit/auction-registry.wit b/examples/rust/rust-auction/auction-registry/wit/auction-registry.wit new file mode 100644 index 0000000..819717b --- /dev/null +++ b/examples/rust/rust-auction/auction-registry/wit/auction-registry.wit @@ -0,0 +1,31 @@ +package pack:name + +interface api { + record bidder-id { + bidder-id: string, + } + + record auction-id { + auction-id: string, + } + + type deadline = u64 + + record auction { + auction-id: auction-id, + name: string, + description: string, + limit-price: float32, + expiration: deadline, + } + + create-bidder: func(name: string, address: string) -> bidder-id + + create-auction: func(name: string, description: string, limit-price: float32, expiration: deadline) -> auction-id + + get-auctions: func() -> list +} + +world auction-registry { + 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"0.0.1" +edition = "2021" + +[lib] +path = "src/lib.rs" +crate-type = ["cdylib"] + +[dependencies] +once_cell = "1.17.1" +rand = "0.8.5" +uuid = { version = "1.4.1", features = ["v4"] } +cargo-component-bindings = { git = "https://github.com/bytecodealliance/cargo-component", rev = "e57d1d1405ed2d76f1f3d8647480dea700379ff8" } + +[package.metadata.component.target] +path = "wit" + +[package.metadata.component.dependencies] \ No newline at end of file diff --git a/examples/rust/rust-auction/auction/src/auction_logic.rs b/examples/rust/rust-auction/auction/src/auction_logic.rs new file mode 100644 index 0000000..a4e0e36 --- /dev/null +++ b/examples/rust/rust-auction/auction/src/auction_logic.rs @@ -0,0 +1,48 @@ +use std::time::{Duration, SystemTime}; + +use crate::model::*; + +pub fn intitialize(state: &mut State, auction: Auction) { + state.auction = Some(auction); +} + +pub fn bid(state: &mut State, bidder_id: BidderId, price: f32) -> BidResult { + let auction = state.auction.clone().unwrap(); + let expiration = auction.expiration; + let winning_bid = state.winning_bid.clone(); + + if now() >= expiration.deadline { + return BidResult::AuctionExpired; + } + + if price < auction.limit_price { + return BidResult::PriceTooLow; + } + + if let Some((_, winning_price)) = winning_bid { + if price <= winning_price { + return BidResult::PriceTooLow; + } + } + + state.winning_bid = Some((bidder_id, price)); + BidResult::Success +} + +pub fn close_auction(state: &mut State) -> Option { + let auction = state.auction.clone().unwrap(); + let expiration = auction.expiration; + let winning_bid = state.winning_bid.clone(); + + if now() >= expiration.deadline { + return winning_bid.map(|(bidder_id, _)| bidder_id); + } + + None +} + +fn now() -> Duration { + SystemTime::now() + .duration_since(SystemTime::UNIX_EPOCH) + .unwrap() +} diff --git a/examples/rust/rust-auction/auction/src/lib.rs b/examples/rust/rust-auction/auction/src/lib.rs new file mode 100644 index 0000000..8fb023e --- /dev/null +++ b/examples/rust/rust-auction/auction/src/lib.rs @@ -0,0 +1,43 @@ +mod auction_logic; +mod model; + +cargo_component_bindings::generate!(); + +use bindings::*; +use exports::pack::name::api::{ + Guest, Auction as WitAuction, BidResult as WitBidResult, BidderId as WitBidderId, +}; +use once_cell::sync::Lazy; + +use model::*; + +struct Component; + +struct WitState { + state: Lazy, +} + +static mut STATE: WitState = WitState { + state: Lazy::new(|| State::new()), +}; + +fn with_state(f: impl FnOnce(&mut State) -> T) -> T { + let result = unsafe { f(&mut STATE.state) }; + + return result; +} + +// Here, we declare a Rust implementation of the `Auction` trait. +impl Guest for Component { + fn initialize(auction: WitAuction) { + with_state(|state| auction_logic::intitialize(state, auction.into())) + } + + fn bid(bidder_id: WitBidderId, price: f32) -> WitBidResult { + with_state(|state| auction_logic::bid(state, bidder_id.into(), price).into()) + } + + fn close_auction() -> Option { + with_state(|state| auction_logic::close_auction(state).map(|bidder_id| bidder_id.into())) + } +} diff --git a/examples/rust/rust-auction/auction/src/model.rs b/examples/rust/rust-auction/auction/src/model.rs new file mode 100644 index 0000000..9c99fb3 --- /dev/null +++ b/examples/rust/rust-auction/auction/src/model.rs @@ -0,0 +1,141 @@ +use std::time::Duration; +use uuid::Uuid; + +use crate::exports::pack::name::api::{ + Auction as WitAuction, AuctionId as WitAuctionId, BidResult as WitBidResult, + BidderId as WitBidderId, Deadline as WitDeadline, +}; + +#[derive(Clone, Eq, Hash, PartialEq, PartialOrd, Ord)] +pub struct BidderId { + pub bidder_id: Uuid, +} + +impl From for BidderId { + fn from(wit_bidder_id: WitBidderId) -> Self { + BidderId { + bidder_id: Uuid::parse_str(&wit_bidder_id.bidder_id).unwrap(), + } + } +} + +impl Into for BidderId { + fn into(self) -> WitBidderId { + WitBidderId { + bidder_id: self.bidder_id.to_string(), + } + } +} + +#[derive(Clone, Eq, Hash, PartialEq, PartialOrd, Ord)] +pub struct AuctionId { + pub auction_id: Uuid, +} + +impl From for AuctionId { + fn from(wit_auction_id: WitAuctionId) -> Self { + AuctionId { + auction_id: Uuid::parse_str(&wit_auction_id.auction_id).unwrap(), + } + } +} + +impl Into for AuctionId { + fn into(self) -> WitAuctionId { + WitAuctionId { + auction_id: self.auction_id.to_string(), + } + } +} + +pub enum BidResult { + AuctionExpired, + PriceTooLow, + Success, +} + +impl From for BidResult { + fn from(wit_bid_result: WitBidResult) -> Self { + match wit_bid_result { + WitBidResult::AuctionExpired => BidResult::AuctionExpired, + WitBidResult::PriceTooLow => BidResult::PriceTooLow, + WitBidResult::Success => BidResult::Success, + } + } +} + +impl Into for BidResult { + fn into(self) -> WitBidResult { + match self { + BidResult::AuctionExpired => WitBidResult::AuctionExpired, + BidResult::PriceTooLow => WitBidResult::PriceTooLow, + BidResult::Success => WitBidResult::Success, + } + } +} + +#[derive(Clone)] +pub struct Deadline { + pub deadline: Duration, +} + +impl From for Deadline { + fn from(wit_deadline: WitDeadline) -> Self { + Deadline { + deadline: Duration::from_secs(wit_deadline), + } + } +} + +impl Into for Deadline { + fn into(self) -> WitDeadline { + self.deadline.as_secs() + } +} + +#[derive(Clone)] +pub struct Auction { + pub auction_id: AuctionId, + pub name: String, + pub description: String, + pub limit_price: f32, + pub expiration: Deadline, +} + +impl From for Auction { + fn from(wit_item: WitAuction) -> Self { + Auction { + auction_id: AuctionId::from(wit_item.auction_id), + name: wit_item.name, + description: wit_item.description, + limit_price: wit_item.limit_price, + expiration: Deadline::from(wit_item.expiration), + } + } +} + +impl Into for Auction { + fn into(self) -> WitAuction { + WitAuction { + auction_id: self.auction_id.into(), + name: self.name, + description: self.description, + limit_price: self.limit_price, + expiration: self.expiration.into(), + } + } +} + +pub struct State { + pub auction: Option, + pub winning_bid: Option<(BidderId, f32)>, +} + +impl State { + pub fn new() -> Self { + State { + auction: None, + winning_bid: None, + } + } +} diff --git a/examples/rust/rust-auction/auction/wit/auction.wit b/examples/rust/rust-auction/auction/wit/auction.wit new file mode 100644 index 0000000..954f4db --- /dev/null +++ b/examples/rust/rust-auction/auction/wit/auction.wit @@ -0,0 +1,37 @@ +package pack:name + +interface api { + record bidder-id { + bidder-id: string, + } + + record auction-id { + auction-id: string, + } + + type deadline = u64 + + record auction { + auction-id: auction-id, + name: string, + description: string, + limit-price: float32, + expiration: deadline, + } + + variant bid-result { + auction-expired, + price-too-low, + success, + } + + initialize: func(auction: auction) -> () + + bid: func(bidder-id: bidder-id, price: float32) -> bid-result + + close-auction: func() -> option +} + +world auction { + export api +} \ No newline at end of file diff --git a/examples/rust/rust-auction/metadata.json b/examples/rust/rust-auction/metadata.json new file mode 100644 index 0000000..d3c854d --- /dev/null +++ b/examples/rust/rust-auction/metadata.json @@ -0,0 +1,8 @@ +{ + "description": "An auction application demonstrating communication between multiple Golem workers", + "requiresAdapter": false, + "requiresGolemHostWIT": false, + "exclude": [ + "target" + ] +} \ No newline at end of file