diff --git a/Cargo.lock b/Cargo.lock
index 9d65170a..28dce8ef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -49,6 +49,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "ansi_term"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.53"
@@ -312,6 +321,18 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "771fe0050b883fcc3ea2359b1a96bcfbc090b7116eae7c3c512c7a083fdf23d3"
 
+[[package]]
+name = "bstr"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba3569f383e8f1598449f1a423e72e99569137b47740b1da11ef19af3d5c3223"
+dependencies = [
+ "lazy_static",
+ "memchr",
+ "regex-automata",
+ "serde",
+]
+
 [[package]]
 name = "build_const"
 version = "0.2.2"
@@ -403,6 +424,21 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "cast"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c24dab4283a142afa2fdca129b80ad2c6284e073930f964c3a1293c225ee39a"
+dependencies = [
+ "rustc_version",
+]
+
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cc"
 version = "1.0.72"
@@ -458,6 +494,17 @@ dependencies = [
  "generic-array 0.14.5",
 ]
 
+[[package]]
+name = "clap"
+version = "2.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
+dependencies = [
+ "bitflags",
+ "textwrap 0.11.0",
+ "unicode-width",
+]
+
 [[package]]
 name = "clap"
 version = "3.0.13"
@@ -472,7 +519,7 @@ dependencies = [
  "os_str_bytes",
  "strsim",
  "termcolor",
- "textwrap",
+ "textwrap 0.14.2",
 ]
 
 [[package]]
@@ -680,6 +727,44 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "criterion"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b01d6de93b2b6c65e17c634a26653a29d107b3c98c607c765bf38d041531cd8f"
+dependencies = [
+ "atty",
+ "cast 0.3.0",
+ "clap 2.34.0",
+ "criterion-plot",
+ "csv",
+ "futures",
+ "itertools",
+ "lazy_static",
+ "num-traits",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_cbor",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "tokio",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d00996de9f2f7559f7f4dc286073197f83e92256a59ed395f9aac01fe717da57"
+dependencies = [
+ "cast 0.2.7",
+ "itertools",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.5.2"
@@ -763,6 +848,38 @@ dependencies = [
  "subtle",
 ]
 
+[[package]]
+name = "csv"
+version = "1.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22813a6dc45b335f9bade10bf7271dc477e81113e89eb251a0bc2a8a81c536e1"
+dependencies = [
+ "bstr",
+ "csv-core",
+ "itoa 0.4.8",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "csv-core"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b2466559f260f48ad25fe6317b3c8dac77b5bdb5763ac7d9d6103530663bc90"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "ctor"
+version = "0.1.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccc0a48a9b826acdf4028595adc9db92caea352f7af011a3034acd172a52a0aa"
+dependencies = [
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "ctr"
 version = "0.8.0"
@@ -963,6 +1080,19 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "env_logger"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b2cf0344971ee6c64c31be0d530793fba457d322dfec2810c453d0ef228f9c3"
+dependencies = [
+ "atty",
+ "humantime",
+ "log",
+ "regex",
+ "termcolor",
+]
+
 [[package]]
 name = "eth-keystore"
 version = "0.4.1"
@@ -1068,7 +1198,10 @@ dependencies = [
  "ethers-contract-derive",
  "ethers-core",
  "ethers-derive-eip712",
+ "ethers-middleware",
  "ethers-providers",
+ "ethers-signers",
+ "ethers-solc",
  "futures-util",
  "hex",
  "once_cell",
@@ -1087,6 +1220,7 @@ dependencies = [
  "cfg-if 1.0.0",
  "dunce",
  "ethers-core",
+ "ethers-solc",
  "eyre",
  "getrandom 0.2.7",
  "hex",
@@ -1096,6 +1230,7 @@ dependencies = [
  "serde",
  "serde_json",
  "syn",
+ "tempfile",
  "url",
  "walkdir",
 ]
@@ -1118,6 +1253,7 @@ name = "ethers-core"
 version = "0.17.0"
 dependencies = [
  "arrayvec 0.7.2",
+ "bincode",
  "bytes",
  "cargo_metadata",
  "chrono",
@@ -1127,6 +1263,7 @@ dependencies = [
  "fastrlp",
  "generic-array 0.14.5",
  "hex",
+ "hex-literal",
  "k256",
  "once_cell",
  "proc-macro2",
@@ -1147,7 +1284,10 @@ dependencies = [
 name = "ethers-derive-eip712"
 version = "0.17.0"
 dependencies = [
+ "ethers-contract",
+ "ethers-contract-derive",
  "ethers-core",
+ "ethers-signers",
  "hex",
  "quote",
  "serde_json",
@@ -1159,14 +1299,19 @@ name = "ethers-etherscan"
 version = "0.17.0"
 dependencies = [
  "ethers-core",
+ "ethers-solc",
  "getrandom 0.2.7",
  "reqwest",
  "semver",
  "serde",
  "serde-aux",
  "serde_json",
+ "serial_test",
+ "tempfile",
  "thiserror",
+ "tokio",
  "tracing",
+ "tracing-subscriber",
 ]
 
 [[package]]
@@ -1179,12 +1324,17 @@ dependencies = [
  "ethers-etherscan",
  "ethers-providers",
  "ethers-signers",
+ "ethers-solc",
  "futures-locks",
  "futures-util",
+ "hex",
  "instant",
+ "once_cell",
+ "rand 0.8.5",
  "reqwest",
  "serde",
  "serde_json",
+ "serial_test",
  "thiserror",
  "tokio",
  "tracing",
@@ -1239,7 +1389,9 @@ dependencies = [
  "coins-ledger",
  "elliptic-curve",
  "eth-keystore",
+ "ethers-contract",
  "ethers-core",
+ "ethers-derive-eip712",
  "futures-executor",
  "futures-util",
  "hex",
@@ -1248,12 +1400,14 @@ dependencies = [
  "rusoto_core",
  "rusoto_kms",
  "semver",
+ "serde_json",
  "sha2 0.10.2",
  "spki",
  "tempfile",
  "thiserror",
  "tokio",
  "tracing",
+ "tracing-subscriber",
  "trezor-client",
  "yubihsm",
 ]
@@ -1264,7 +1418,9 @@ version = "0.17.0"
 dependencies = [
  "cfg-if 1.0.0",
  "colored",
+ "criterion",
  "dunce",
+ "env_logger",
  "ethers-core",
  "fs_extra",
  "futures-util",
@@ -1276,6 +1432,7 @@ dependencies = [
  "num_cpus",
  "once_cell",
  "path-slash",
+ "pretty_assertions",
  "rand 0.8.5",
  "rayon",
  "regex",
@@ -1291,6 +1448,7 @@ dependencies = [
  "tiny-keccak",
  "tokio",
  "tracing",
+ "tracing-subscriber",
  "walkdir",
 ]
 
@@ -1306,6 +1464,7 @@ dependencies = [
  "serde_json",
  "wasm-bindgen",
  "wasm-bindgen-futures",
+ "wasm-bindgen-test",
  "web-sys",
  "wee_alloc",
 ]
@@ -1645,6 +1804,12 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "half"
+version = "1.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eabb4a44450da02c90444cf74558da904edde8fb4e9035a9a6a4e15445af0bd7"
+
 [[package]]
 name = "hashbrown"
 version = "0.11.2"
@@ -1681,6 +1846,12 @@ version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
+[[package]]
+name = "hex-literal"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ebdb29d2ea9ed0083cd8cece49bbd968021bd99b0849edb4a9a7ee0fdf6a4e0"
+
 [[package]]
 name = "hidapi-rusb"
 version = "1.3.2"
@@ -1729,7 +1900,7 @@ checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
 dependencies = [
  "bytes",
  "fnv",
- "itoa",
+ "itoa 1.0.1",
 ]
 
 [[package]]
@@ -1755,6 +1926,12 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"
 
+[[package]]
+name = "humantime"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
+
 [[package]]
 name = "hyper"
 version = "0.14.19"
@@ -1770,7 +1947,7 @@ dependencies = [
  "http-body",
  "httparse",
  "httpdate",
- "itoa",
+ "itoa 1.0.1",
  "pin-project-lite",
  "socket2",
  "tokio",
@@ -1909,6 +2086,12 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itoa"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
+
 [[package]]
 name = "itoa"
 version = "1.0.1"
@@ -2026,6 +2209,15 @@ dependencies = [
  "cfg-if 1.0.0",
 ]
 
+[[package]]
+name = "matchers"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8263075bb86c5a1b1427b5ae862e8889656f126e9f77c484496e8b47cf5c5558"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.9"
@@ -2187,6 +2379,12 @@ version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
 
+[[package]]
+name = "oorandom"
+version = "11.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -2241,6 +2439,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "output_vt100"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53cdc5b785b7a58c5aad8216b3dfa114df64b0b06ae6e1501cef91df2fbdf8f9"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "p256"
 version = "0.11.1"
@@ -2522,6 +2729,34 @@ version = "0.3.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "58893f751c9b0412871a09abd62ecd2a00298c6c83befa223ef98c52aef40cbe"
 
+[[package]]
+name = "plotters"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a3fd9ec30b9749ce28cd91f255d569591cdf937fe280c312143e3c4bad6f2a"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d88417318da0eaf0fdcdb51a0ee6c3bed624333bff8f946733049380be67ac1c"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "521fa9638fa597e1dc53e9412a4f9cefb01187ee1f7413076f9e6749e2885ba9"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.16"
@@ -2534,6 +2769,18 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
+[[package]]
+name = "pretty_assertions"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c89f989ac94207d048d92db058e4f6ec7342b0971fc58d1271ca148b799b3563"
+dependencies = [
+ "ansi_term",
+ "ctor",
+ "diff",
+ "output_vt100",
+]
+
 [[package]]
 name = "primitive-types"
 version = "0.11.1"
@@ -2748,6 +2995,15 @@ dependencies = [
  "regex-syntax",
 ]
 
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax",
+]
+
 [[package]]
 name = "regex-syntax"
 version = "0.6.27"
@@ -3041,6 +3297,12 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "scoped-tls"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -3141,6 +3403,16 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "serde_cbor"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bef2ebfde456fb76bbcf9f59315333decc4fda0b2b44b420243c11e0f5ec1f5"
+dependencies = [
+ "half",
+ "serde",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.137"
@@ -3158,7 +3430,7 @@ version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e8d9fa5c3b304765ce1fd9c4c8a3de2c8db365a5b91be52f186efc675681d95"
 dependencies = [
- "itoa",
+ "itoa 1.0.1",
  "ryu",
  "serde",
 ]
@@ -3170,11 +3442,37 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
 dependencies = [
  "form_urlencoded",
- "itoa",
+ "itoa 1.0.1",
  "ryu",
  "serde",
 ]
 
+[[package]]
+name = "serial_test"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7eec42e7232e5ca56aa59d63af3c7f991fe71ee6a3ddd2d3480834cf3902b007"
+dependencies = [
+ "futures",
+ "lazy_static",
+ "log",
+ "parking_lot 0.12.0",
+ "serial_test_derive",
+]
+
+[[package]]
+name = "serial_test_derive"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1b95bb2f4f624565e8fe8140c789af7e2082c0e0561b5a82a1b678baa9703dc"
+dependencies = [
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn",
+]
+
 [[package]]
 name = "sha-1"
 version = "0.10.0"
@@ -3254,6 +3552,15 @@ dependencies = [
  "keccak",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "900fba806f70c630b0a382d0d825e17a0f19fcd059a2ade1ff237bcddf446b31"
+dependencies = [
+ "lazy_static",
+]
+
 [[package]]
 name = "shlex"
 version = "1.1.0"
@@ -3410,7 +3717,7 @@ checksum = "a55e00b6f95abd889ce398bd7eab2a9c62cd27281cf1bfba70847340557434cf"
 dependencies = [
  "anyhow",
  "cfg-if 1.0.0",
- "clap",
+ "clap 3.0.13",
  "console 0.14.1",
  "dialoguer",
  "fs2",
@@ -3519,6 +3826,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.14.2"
@@ -3545,13 +3861,22 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5516c27b78311c50bf42c071425c560ac799b11c30b31f87e3081965fe5e0180"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "time"
 version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "004cbc98f30fa233c61a38bc77e96a9106e65c88f2d3bef182ae952027e5753d"
 dependencies = [
- "itoa",
+ "itoa 1.0.1",
  "libc",
  "num_threads",
  "serde",
@@ -3573,6 +3898,16 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "tinyvec"
 version = "1.5.1"
@@ -3717,6 +4052,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b7358be39f2f274f322d2aaed611acc57f382e8eb1e5b48cb9ae30933495ce7"
 dependencies = [
  "once_cell",
+ "valuable",
 ]
 
 [[package]]
@@ -3729,6 +4065,35 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "tracing-log"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6923477a48e41c1951f1999ef8bb5a3023eb723ceadafe78ffb65dc366761e3"
+dependencies = [
+ "lazy_static",
+ "log",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60db860322da191b40952ad9affe65ea23e7dd6a5c442c2c42865810c6ab8e6b"
+dependencies = [
+ "ansi_term",
+ "matchers",
+ "once_cell",
+ "regex",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+]
+
 [[package]]
 name = "trezor-client"
 version = "0.0.6"
@@ -3866,6 +4231,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "valuable"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
+
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -3985,6 +4356,30 @@ version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6598dd0bd3c7d51095ff6531a5b23e02acdc81804e30d8f07afb77b7215a140a"
 
+[[package]]
+name = "wasm-bindgen-test"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "513df541345bb9fcc07417775f3d51bbb677daf307d8035c0afafd87dc2e6599"
+dependencies = [
+ "console_error_panic_hook",
+ "js-sys",
+ "scoped-tls",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-bindgen-test-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-test-macro"
+version = "0.3.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6150d36a03e90a3cf6c12650be10626a9902d70c5270fd47d7a47e5389a10d56"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
 [[package]]
 name = "wasm-timer"
 version = "0.2.5"
diff --git a/Cargo.toml b/Cargo.toml
index 3e5472c3..23d51479 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,13 +12,6 @@ description = """
 Complete Ethereum library and wallet implementation in Rust.
 """
 
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
-
-[package.metadata.playground]
-features = ["full"]
-
 [workspace]
 members = [
     "ethers-addressbook",
@@ -43,6 +36,13 @@ default-members = [
     "ethers-solc",
 ]
 
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[package.metadata.playground]
+features = ["full"]
+
 [features]
 celo = [
     "ethers-core/celo",
@@ -90,6 +90,10 @@ ethers-middleware = { version = "^0.17.0", default-features = false, path = "./e
 ethers-solc = { version = "^0.17.0", default-features = false, path = "./ethers-solc", optional = true }
 ethers-etherscan = { version = "^0.17.0", default-features = false, path = "./ethers-etherscan" }
 
+[dev-dependencies]
+ethers-contract = { version = "^0.17.0", default-features = false, path = "./ethers-contract", features = ["abigen", "eip712"] }
+ethers-providers = { version = "^0.17.0", default-features = false, path = "./ethers-providers", features = ["ws"] }
+
 [target.'cfg(target_family = "unix")'.dev-dependencies]
 ethers-providers = { version = "^0.17.0", default-features = false, path = "./ethers-providers", features = ["ws", "ipc"] }
 eyre = "0.6"
diff --git a/ethers-contract/Cargo.toml b/ethers-contract/Cargo.toml
index 0896b47d..f5c23640 100644
--- a/ethers-contract/Cargo.toml
+++ b/ethers-contract/Cargo.toml
@@ -9,10 +9,6 @@ homepage = "https://docs.rs/ethers"
 repository = "https://github.com/gakonst/ethers-rs"
 keywords = ["ethereum", "web3", "celo", "ethers"]
 
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
-
 [dependencies]
 ethers-providers = { version = "^0.17.0", path = "../ethers-providers", default-features = false }
 ethers-core = { version = "^0.17.0", path = "../ethers-core", default-features = false }
@@ -28,6 +24,16 @@ pin-project = {version = "1.0.11", default-features = false }
 futures-util = { version = "^0.3" }
 hex = { version = "0.4.3", default-features = false, features = ["std"] }
 
+[dev-dependencies]
+ethers-middleware = { version = "^0.17.0", path = "../ethers-middleware" }
+ethers-providers = { version = "^0.17.0", path = "../ethers-providers", default-features = false, features = ["ws"] }
+ethers-signers = { version = "^0.17.0", path = "../ethers-signers" }
+ethers-contract-abigen = { version = "^0.17.0", path = "ethers-contract-abigen" }
+ethers-contract-derive = { version = "^0.17.0", path = "ethers-contract-derive" }
+ethers-core = { version = "^0.17.0", path = "../ethers-core", default-features = false, features = ["eip712"]}
+ethers-derive-eip712 = { version = "^0.17.0", path = "../ethers-core/ethers-derive-eip712"}
+ethers-solc = { version = "^0.17.0", path = "../ethers-solc", default-features = false }
+
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 tokio = { version = "1.18", default-features = false, features = ["macros"] }
 
@@ -40,3 +46,7 @@ legacy = []
 
 rustls = ["ethers-contract-abigen/rustls"]
 openssl = ["ethers-contract-abigen/openssl"]
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
diff --git a/ethers-contract/ethers-contract-abigen/Cargo.toml b/ethers-contract/ethers-contract-abigen/Cargo.toml
index ed75e704..88eca922 100644
--- a/ethers-contract/ethers-contract-abigen/Cargo.toml
+++ b/ethers-contract/ethers-contract-abigen/Cargo.toml
@@ -9,10 +9,6 @@ homepage = "https://docs.rs/ethers"
 repository = "https://github.com/gakonst/ethers-rs"
 keywords = ["ethereum", "web3", "celo", "ethers"]
 
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
-
 [dependencies]
 ethers-core = { version = "^0.17.0", path = "../../ethers-core", features = ["macros"] }
 
@@ -34,7 +30,15 @@ eyre = "0.6"
 # NOTE: this enables wasm compatibility for getrandom indirectly
 getrandom = { version = "0.2", features = ["js"] }
 
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
 [features]
 default = ["reqwest", "rustls"]
 openssl = ["reqwest/native-tls"]
 rustls = ["reqwest/rustls-tls"]
+
+[dev-dependencies]
+tempfile = "3.2.0"
+ethers-solc = { version = "^0.17.0", path = "../../ethers-solc", default-features = false, features = ["project-util", "svm-solc"] }
diff --git a/ethers-contract/ethers-contract-derive/Cargo.toml b/ethers-contract/ethers-contract-derive/Cargo.toml
index 449adcd3..98fa5153 100644
--- a/ethers-contract/ethers-contract-derive/Cargo.toml
+++ b/ethers-contract/ethers-contract-derive/Cargo.toml
@@ -9,10 +9,6 @@ homepage = "https://docs.rs/ethers"
 repository = "https://github.com/gakonst/ethers-rs"
 keywords = ["ethereum", "web3", "celo", "ethers"]
 
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
-
 [lib]
 proc-macro = true
 
@@ -25,3 +21,7 @@ hex = { version = "0.4.3", default-features = false, features = ["std"] }
 proc-macro2 = "1.0"
 quote = "1.0"
 syn = "1.0.12"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index 1b7cab48..b4824314 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -9,10 +9,6 @@ homepage = "https://docs.rs/ethers"
 repository = "https://github.com/gakonst/ethers-rs"
 keywords = ["ethereum", "web3", "celo", "ethers"]
 
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
-
 [dependencies]
 fastrlp = { version = "0.1.3", features = ["std", "derive", "ethereum-types"] }
 rlp = { version = "0.5.0", default-features = false, features = ["std"] }
@@ -47,8 +43,19 @@ syn = { version = "1.0.98", optional = true }
 proc-macro2 = { version = "1.0.42", optional = true }
 rust_decimal = "1.25.0"
 
+[dev-dependencies]
+serde_json = { version = "1.0.64", default-features = false }
+bincode = { version = "1.3.3", default-features = false }
+once_cell = { version = "1.13.0" }
+hex-literal = "0.3.4"
+rand = "0.8.5"
+
 [features]
 celo = ["legacy"] # celo support extends the transaction format with extra fields
 legacy = []
 eip712 = ["convert_case", "syn", "proc-macro2"]
 macros = ["syn", "cargo_metadata", "once_cell"]
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
diff --git a/ethers-core/ethers-derive-eip712/Cargo.toml b/ethers-core/ethers-derive-eip712/Cargo.toml
index 078d9fba..0dd170f6 100644
--- a/ethers-core/ethers-derive-eip712/Cargo.toml
+++ b/ethers-core/ethers-derive-eip712/Cargo.toml
@@ -14,3 +14,8 @@ syn = "1.0.77"
 ethers-core = { version = "^0.17.0", path = "../", default-features = false, features = ["eip712", "macros"] }
 hex = "0.4.3"
 serde_json = "1.0.68"
+
+[dev-dependencies]
+ethers-contract = { version = "^0.17.0", path = "../../ethers-contract", features = ["abigen"]}
+ethers-contract-derive = { version = "^0.17.0", path = "../../ethers-contract/ethers-contract-derive" }
+ethers-signers = { version = "^0.17.0", path = "../../ethers-signers" }
diff --git a/ethers-etherscan/Cargo.toml b/ethers-etherscan/Cargo.toml
index 2349f665..9803b976 100644
--- a/ethers-etherscan/Cargo.toml
+++ b/ethers-etherscan/Cargo.toml
@@ -13,10 +13,6 @@ Rust API bindings for the etherscan.io web API
 """
 keywords = ["ethereum", "web3", "etherscan", "ethers"]
 
-[package.metadata.docs.rs]
-all-features = true
-rustdoc-args = ["--cfg", "docsrs"]
-
 [dependencies]
 ethers-core = { version = "^0.17.0", path = "../ethers-core", default-features = false }
 reqwest = { version = "0.11.11", default-features = false, features = ["json"] }
@@ -31,6 +27,17 @@ semver = "1.0.12"
 # NOTE: this enables wasm compatibility for getrandom indirectly
 getrandom = { version = "0.2", features = ["js"] }
 
+[dev-dependencies]
+tempfile = "3.3.0"
+tokio = { version = "1.18", features = ["macros", "rt-multi-thread", "time"] }
+serial_test = "0.8.0"
+tracing-subscriber = { version = "0.3", default-features = false, features = ["env-filter", "fmt"] }
+ethers-solc = { version = "^0.17.0", path = "../ethers-solc", default-features = false }
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
 [features]
 default = ["rustls"]
 openssl = ["reqwest/native-tls"]
diff --git a/ethers-middleware/Cargo.toml b/ethers-middleware/Cargo.toml
index 15c5e809..b34d4b2d 100644
--- a/ethers-middleware/Cargo.toml
+++ b/ethers-middleware/Cargo.toml
@@ -38,6 +38,14 @@ instant = {version = "0.1.12", features = ["now"] }
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 tokio = { version = "1.18" }
 
+[dev-dependencies]
+hex = { version = "0.4.3", default-features = false, features = ["std"] }
+rand = { version = "0.8.5", default-features = false }
+ethers-providers = { version = "^0.17.0", path = "../ethers-providers", default-features = false, features = ["ws", "rustls"] }
+once_cell = "1.13.0"
+ethers-solc = { version = "^0.17.0", path = "../ethers-solc" }
+serial_test = "0.8.0"
+
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 tokio = { version = "1.18", default-features = false, features = ["rt", "macros", "time"] }
 
diff --git a/ethers-providers/Cargo.toml b/ethers-providers/Cargo.toml
index 4e72d392..a4413597 100644
--- a/ethers-providers/Cargo.toml
+++ b/ethers-providers/Cargo.toml
@@ -47,10 +47,6 @@ hashers = "1.0.1"
 tokio = { version = "1.18", features = ["time"] }
 tokio-tungstenite = { version = "0.17.2", default-features = false, features = ["connect"], optional = true }
 
-[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
-tokio = { version = "1.18", default-features = false, features = ["rt", "macros", "time"] }
-tempfile = "3.3.0"
-
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 ws_stream_wasm = "0.7"
@@ -63,6 +59,10 @@ parking_lot = { version = "0.11", features = ["wasm-bindgen"] }
 # NOTE: this enables wasm compatibility for getrandom indirectly
 getrandom = { version = "0.2", features = ["js"] }
 
+[target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
+tokio = { version = "1.18", default-features = false, features = ["rt", "macros", "time"] }
+tempfile = "3.3.0"
+
 [features]
 default = ["ws", "rustls"]
 celo = ["ethers-core/celo"]
diff --git a/ethers-signers/Cargo.toml b/ethers-signers/Cargo.toml
index d279a964..6bdcb424 100644
--- a/ethers-signers/Cargo.toml
+++ b/ethers-signers/Cargo.toml
@@ -40,6 +40,13 @@ spki = { version = "0.6.0", optional = true }
 eth-keystore = { version = "0.4.1" }
 home = { version = "0.5.3", optional = true }
 
+[dev-dependencies]
+ethers-contract = { version = "^0.17.0", path = "../ethers-contract", features = ["eip712", "abigen"]}
+ethers-derive-eip712 = { version = "^0.17.0", path = "../ethers-core/ethers-derive-eip712" }
+serde_json = { version = "1.0.64" }
+tracing-subscriber = "0.3.15"
+yubihsm = { version = "0.41.0-pre", features = ["secp256k1", "usb", "mockhsm"] }
+
 [target.'cfg(not(target_arch = "wasm32"))'.dev-dependencies]
 yubihsm = { version = "0.41.0-pre", features = ["secp256k1", "usb", "mockhsm"] }
 tokio = { version = "1.18", default-features = false, features = ["macros", "rt"] }
diff --git a/ethers-solc/Cargo.toml b/ethers-solc/Cargo.toml
index ae83bd50..48128a6a 100644
--- a/ethers-solc/Cargo.toml
+++ b/ethers-solc/Cargo.toml
@@ -50,6 +50,15 @@ svm-builds = { package = "svm-rs-builds", version = "0.1.5", optional = true}
 # NOTE: this enables wasm compatibility for getrandom indirectly
 getrandom = { version = "0.2", features = ["js"] }
 
+[dev-dependencies]
+criterion = { version = "0.3", features = ["async_tokio"] }
+env_logger = "*"
+tracing-subscriber = {version = "0.3", default-features = false, features = ["env-filter", "fmt"]}
+rand = "0.8.5"
+pretty_assertions = "1.2.1"
+tempfile = "3.3.0"
+tokio = { version = "1.18", features = ["full"] }
+
 [[bench]]
 name = "compile_many"
 harness = false
diff --git a/examples/ethers-wasm/Cargo.toml b/examples/ethers-wasm/Cargo.toml
index fb2956a6..fbc6c023 100644
--- a/examples/ethers-wasm/Cargo.toml
+++ b/examples/ethers-wasm/Cargo.toml
@@ -41,3 +41,6 @@ wee_alloc = { version = "0.4.5", optional = true }
 serde = { version = "1.0.126", features = ["derive"] }
 hex = "0.4.3"
 web-sys = "0.3.59"
+
+[dev-dependencies]
+wasm-bindgen-test = "0.3.32"