fix: conditional http support (#632)

* fix: conditional http support

* chore: update changelog

Co-authored-by: Georgios Konstantopoulos <me@gakonst.com>

CHANGELOG.md

@@ -2,18 +2,24 @@
 
 ## ethers-core
 
-- Change types mapping for solidity `bytes` to rust `ethers::core::Bytes` and solidity `uint8[]` to rust `Vec<u8>`.
+### Unreleased
+
+- Change types mapping for solidity `bytes` to rust `ethers::core::Bytes` and
+  solidity `uint8[]` to rust `Vec<u8>`.
   [613](https://github.com/gakonst/ethers-rs/pull/613)
 - Fix `format_units` to return a `String` of representing a decimal point float
   such that the decimal places don't get truncated.
   [597](https://github.com/gakonst/ethers-rs/pull/597)
-- Implement hex display format for `ethers::core::Bytes` [#624](https://github.com/gakonst/ethers-rs/pull/624).
+- Implement hex display format for `ethers::core::Bytes`
+  [#624](https://github.com/gakonst/ethers-rs/pull/624).
 
 ## ethers-solc
-- Return cached artifacts from project `compile` when the cache only contains some files
 
 ### Unreleased
 
+- Return cached artifacts from project `compile` when the cache only contains
+  some files
+
 ### 0.6.0
 
 - move `AbiEncode` `AbiDecode` trait to ethers-core and implement for core types
@@ -82,6 +88,13 @@
 
 ## ethers-contract
 
+### Unreleased
+
+- fix Etherscan conditional HTTP support
+  [#632](https://github.com/gakonst/ethers-rs/pull/632)
+- use `CARGO_MANIFEST_DIR` as root for relative paths in abigen
+  [#631](https://github.com/gakonst/ethers-rs/pull/631)
+
 ### 0.6.0
 
 - Provide a way to opt out of networking support in abigen proc macro with

ethers-contract/ethers-contract-abigen/src/source.rs

@@ -279,4 +279,11 @@ mod tests {
         let hardhat_parsed = Source::parse(&hardhat_src).unwrap();
         assert_eq!(hardhat_parsed, Source::String(hardhat_src));
     }
+
+    #[test]
+    #[ignore]
+    fn get_etherscan_contract() {
+        let source = Source::etherscan("0x6b175474e89094c44da98b954eedeac495271d0f").unwrap();
+        let _dai = source.get().unwrap();
+    }
 }

ethers-contract/ethers-contract-abigen/src/util.rs

@@ -74,7 +74,7 @@ where
 /// Perform an HTTP GET request and return the contents of the response.
 pub fn http_get(_url: &str) -> Result<String> {
     cfg_if! {
-        if #[cfg(any(not(target_arch = "wasm32"), not(features = "reqwest")))]{
+        if #[cfg(any(target_arch = "wasm32", not(feature = "reqwest")))]{
             Err(anyhow!("HTTP is unsupported"))
         } else {
             Ok(reqwest::blocking::get(_url)?.text()?)