feat: add etherscan client crate

Cargo.toml

@@ -19,6 +19,7 @@ members = [
     "ethers-signers",
     "ethers-core",
     "ethers-middleware",
+    "ethers-etherscan"
 ]
 
 default-members = [
@@ -27,6 +28,7 @@ default-members = [
     "ethers-signers",
     "ethers-core",
     "ethers-middleware",
+    "ethers-etherscan"
 ]
 
 exclude = [

ethers-etherscan/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "ethers-etherscan"
+version = "0.1.0"
+authors = ["Matthias Seitz <matthias.seitz@outlook.de>", "Georgios Konstantopoulos <me@gakonst.com>"]
+license = "MIT OR Apache-2.0"
+edition = "2018"
+readme = "README.md"
+documentation = "https://docs.rs/ethers"
+repository = "https://github.com/gakonst/ethers-rs"
+homepage = "https://docs.rs/ethers"
+description = """
+Rust API bindings for the etherscan.io web api
+"""
+keywords = ["ethereum", "web3", "etherscan", "ethers"]
+
+[dependencies]
+ethers-core = { version = "^0.5.0", path = "../ethers-core", default-features = false }
+reqwest = { version = "0.11.4", features = ["json"] }
+serde = { version = "1.0.124", default-features = false, features = ["derive"] }
+anyhow = "1.0.37"
+serde_json = { version = "1.0.64", default-features = false }
+
+[dev-dependencies]
+tokio = { version = "1.5", features = ["macros", "rt-multi-thread"] }
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]