53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
#![doc = include_str!("../README.md")]
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#![deny(unsafe_code, rustdoc::broken_intra_doc_links)]
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#![cfg_attr(docsrs, feature(doc_cfg))]
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pub use ethers_core::types::{Address, Chain};
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use once_cell::sync::Lazy;
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use serde::Deserialize;
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use std::collections::HashMap;
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const CONTRACTS_JSON: &str = include_str!("./contracts/contracts.json");
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static ADDRESSBOOK: Lazy<HashMap<String, Contract>> =
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Lazy::new(|| serde_json::from_str(CONTRACTS_JSON).unwrap());
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/// Wrapper around a hash map that maps a [Chain] to the contract's deployed address on that chain.
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#[derive(Clone, Debug, Deserialize)]
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pub struct Contract {
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addresses: HashMap<Chain, Address>,
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}
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impl Contract {
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/// Returns the address of the contract on the specified chain. If the contract's address is
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/// not found in the addressbook, the getter returns None.
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pub fn address(&self, chain: Chain) -> Option<Address> {
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self.addresses.get(&chain).cloned()
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}
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}
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/// Fetch the addressbook for a contract by its name. If the contract name is not a part of
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/// [ethers-addressbook](https://github.com/gakonst/ethers-rs/tree/master/ethers-addressbook) we return None.
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pub fn contract<S: Into<String>>(name: S) -> Option<Contract> {
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ADDRESSBOOK.get(&name.into()).cloned()
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_tokens() {
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assert!(contract("dai").is_some());
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assert!(contract("usdc").is_some());
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assert!(contract("rand").is_none());
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}
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#[test]
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fn test_addrs() {
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assert!(contract("dai").unwrap().address(Chain::Mainnet).is_some());
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assert!(contract("dai").unwrap().address(Chain::MoonbeamDev).is_none());
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}
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}
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