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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE O THE USE OR OTHER +DEALINGS IN THE SOFTWARE.R diff --git a/ethers-contract/Cargo.toml b/ethers-contract/Cargo.toml index 0677f9bc..337f6657 100644 --- a/ethers-contract/Cargo.toml +++ b/ethers-contract/Cargo.toml @@ -1,5 +1,6 @@ [package] name = "ethers-contract" +license = "MIT OR Apache-2.0" version = "0.1.0" authors = ["Georgios Konstantopoulos "] edition = "2018" diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml index 1694a8a8..69085e72 100644 --- a/ethers-core/Cargo.toml +++ b/ethers-core/Cargo.toml @@ -1,5 +1,6 @@ [package] name = "ethers-core" +license = "MIT OR Apache-2.0" version = "0.1.0" authors = ["Georgios Konstantopoulos "] edition = "2018" diff --git a/ethers-providers/Cargo.toml b/ethers-providers/Cargo.toml index 78e4119c..0fee87c5 100644 --- a/ethers-providers/Cargo.toml +++ b/ethers-providers/Cargo.toml @@ -1,5 +1,6 @@ [package] name = "ethers-providers" +license = "MIT OR Apache-2.0" version = "0.1.0" authors = ["Georgios Konstantopoulos "] edition = "2018" diff --git a/ethers-providers/src/ws.rs b/ethers-providers/src/ws.rs new file mode 100644 index 00000000..3163f7e8 --- /dev/null +++ b/ethers-providers/src/ws.rs @@ -0,0 +1,204 @@ +use crate::{provider::ProviderError, JsonRpcClient}; + +use async_trait::async_trait; +use reqwest::{Client, Error as ReqwestError}; +use serde::{Deserialize, Serialize}; +use serde_json::Value; +use std::{ + fmt, + str::FromStr, + sync::atomic::{AtomicU64, Ordering}, +}; +use thiserror::Error; +use url::Url; + +/// A low-level JSON-RPC Client over HTTP. +/// +/// # Example +/// +/// ```no_run +/// use ethers::{types::U64, providers::{JsonRpcClient, Http}}; +/// use std::str::FromStr; +/// +/// # async fn foo() -> Result<(), Box> { +/// let provider = Http::from_str("http://localhost:8545")?; +/// let block_number: U64 = provider.request("eth_blockNumber", None::<()>).await?; +/// # Ok(()) +/// # } +/// ``` +#[derive(Debug)] +pub struct Provider { + id: AtomicU64, + client: Client, + url: Url, +} + +#[derive(Error, Debug)] +/// Error thrown when sending an HTTP request +pub enum WsError { + /// Thrown if the request failed + #[error(transparent)] + ReqwestError(#[from] ReqwestError), + #[error(transparent)] + /// Thrown if the response could not be parsed + JsonRpcError(#[from] errors::JsonRpcError), +} + +impl From for ProviderError { + fn from(src: ClientError) -> Self { + ProviderError::JsonRpcClientError(Box::new(src)) + } +} + +#[async_trait] +impl JsonRpcClient for Provider { + type Error = ClientError; + + /// Sends a POST request with the provided method and the params serialized as JSON + /// over HTTP + async fn request Deserialize<'a>>( + &self, + method: &str, + params: T, + ) -> Result { + let next_id = self.id.load(Ordering::SeqCst) + 1; + self.id.store(next_id, Ordering::SeqCst); + + let payload = Request::new(next_id, method, params); + + let res = self + .client + .post(self.url.as_ref()) + .json(&payload) + .send() + .await?; + let res = res.json::>().await?; + + Ok(res.data.into_result()?) + } +} + +impl Provider { + /// Initializes a new HTTP Client + /// + /// # Example + /// + /// ``` + /// use ethers::providers::Http; + /// use url::Url; + /// + /// let url = Url::parse("http://localhost:8545").unwrap(); + /// let provider = Http::new(url); + /// ``` + pub fn new(url: impl Into) -> Self { + Self { + id: AtomicU64::new(0), + client: Client::new(), + url: url.into(), + } + } +} + +impl FromStr for Provider { + type Err = url::ParseError; + + fn from_str(src: &str) -> Result { + let url = Url::parse(src)?; + Ok(Provider::new(url)) + } +} + +impl Clone for Provider { + fn clone(&self) -> Self { + Self { + id: AtomicU64::new(0), + client: self.client.clone(), + url: self.url.clone(), + } + } +} + +// leak private type w/o exposing it +mod errors { + use super::*; + + #[derive(Serialize, Deserialize, Debug, Clone, Error)] + /// A JSON-RPC 2.0 error + pub struct JsonRpcError { + /// The error code + pub code: i64, + /// The error message + pub message: String, + /// Additional data + pub data: Option, + } + + impl fmt::Display for JsonRpcError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!( + f, + "(code: {}, message: {}, data: {:?})", + self.code, self.message, self.data + ) + } + } +} + +#[derive(Serialize, Deserialize, Debug)] +/// A JSON-RPC request +struct Request<'a, T> { + id: u64, + jsonrpc: &'a str, + method: &'a str, + params: T, +} + +impl<'a, T> Request<'a, T> { + /// Creates a new JSON RPC request + fn new(id: u64, method: &'a str, params: T) -> Self { + Self { + id, + jsonrpc: "2.0", + method, + params, + } + } +} + +#[derive(Serialize, Deserialize, Debug, Clone)] +struct Response { + id: u64, + jsonrpc: String, + #[serde(flatten)] + data: ResponseData, +} + +#[derive(Serialize, Deserialize, Debug, Clone)] +#[serde(untagged)] +enum ResponseData { + Error { error: errors::JsonRpcError }, + Success { result: R }, +} + +impl ResponseData { + /// Consume response and return value + fn into_result(self) -> Result { + match self { + ResponseData::Success { result } => Ok(result), + ResponseData::Error { error } => Err(error), + } + } +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn response() { + let response: Response = + serde_json::from_str(r#"{"jsonrpc": "2.0", "result": 19, "id": 1}"#).unwrap(); + assert_eq!(response.id, 1); + assert_eq!(response.data.into_result().unwrap(), 19); + } +} diff --git a/ethers-signers/Cargo.toml b/ethers-signers/Cargo.toml index c26f3147..f81daf07 100644 --- a/ethers-signers/Cargo.toml +++ b/ethers-signers/Cargo.toml @@ -1,5 +1,6 @@ [package] name = "ethers-signers" +license = "MIT OR Apache-2.0" version = "0.1.0" authors = ["Georgios Konstantopoulos "] edition = "2018" diff --git a/ethers/Cargo.toml b/ethers/Cargo.toml index 50d88731..ded2a75f 100644 --- a/ethers/Cargo.toml +++ b/ethers/Cargo.toml @@ -2,6 +2,7 @@ name = "ethers" version = "0.1.0" authors = ["Georgios Konstantopoulos "] +license = "MIT OR Apache-2.0" edition = "2018" readme = "README.md" documentation = "https://docs.rs/ethers"