fix: unify name of supported chains with strum (gakonst#1249)

* add strum

* update strum version

* whitespace

* revert strum

* using strum EnumVariantNames

* fix strum serialize kebab case and edge cases

.gitignore

@@ -1,3 +1,4 @@
 /target
 .vscode
 /.envrc
+.idea

ethers-core/Cargo.toml

@@ -31,6 +31,7 @@ bytes = { version = "1.1.0", features = ["serde"] }
 hex = { version = "0.4.3", default-features = false, features = ["std"] }
 once_cell = { version = "1.10.0", optional = true }
 unicode-xid = "0.2.3"
+strum = { version = "0.24", features = ["derive"] }
 
 # macros feature enabled dependencies
 cargo_metadata = { version = "0.14.2", optional = true }

ethers-core/src/types/chain.rs

@@ -5,20 +5,23 @@ use core::convert::TryFrom;
 use std::{convert::TryInto, default, fmt, str::FromStr};
 
 use crate::types::U256;
+use strum::{EnumVariantNames};
 
 #[derive(Debug, Clone, Error)]
 #[error("Failed to parse chain: {0}")]
 pub struct ParseChainError(String);
 
 #[repr(u64)]
-#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash, Deserialize)]
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash, Deserialize, EnumVariantNames)]
 #[serde(rename_all = "snake_case")]
+#[strum(serialize_all = "kebab-case")]
 pub enum Chain {
     Mainnet = 1,
     Ropsten = 3,
     Rinkeby = 4,
     Goerli = 5,
     Kovan = 42,
+    #[strum(serialize = "xdai")]
     XDai = 100,
     Polygon = 137,
     Fantom = 250,
@@ -33,12 +36,14 @@ pub enum Chain {
     Moonriver = 1285,
     Optimism = 10,
     OptimismKovan = 69,
-    BinanceSmartChain = 56,
-    BinanceSmartChainTestnet = 97,
     Arbitrum = 42161,
     ArbitrumTestnet = 421611,
     Cronos = 25,
     CronosTestnet = 338,
+    #[strum(serialize = "bsc")]
+    BinanceSmartChain = 56,
+    #[strum(serialize = "bsc-testnet")]
+    BinanceSmartChainTestnet = 97,
 }
 
 impl fmt::Display for Chain {