From f78edfeabb62df171f11bc8513309f92eb786b17 Mon Sep 17 00:00:00 2001
From: James Prestwich <10149425+prestwich@users.noreply.github.com>
Date: Mon, 16 Aug 2021 23:48:02 -0700
Subject: [PATCH] feature: add legacy feature to ethers crate (#384)

---
 Cargo.lock             | 240 +++++++++++++++++++++--------------------
 ethers-core/Cargo.toml |   5 +-
 ethers/Cargo.toml      |   6 +-
 3 files changed, 131 insertions(+), 120 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 61b7aeb6..aacef4f9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -14,9 +14,9 @@ dependencies = [
 
 [[package]]
 name = "addr2line"
-version = "0.15.2"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7a2e47a1fbe209ee101dd6d61285226744c6c8d3c21c8dc878ba6cb9f467f3a"
+checksum = "3e61f2b7f93d2c7d2b08263acaa4a363b3e276806c68af6134c44f523bf1aacd"
 dependencies = [
  "gimli",
 ]
@@ -29,11 +29,12 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "aead"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "922b33332f54fc0ad13fa3e514601e8d30fb54e1f3eadc36643f6526db645621"
+checksum = "6e3e798aa0c8239776f54415bc06f3d74b1850f3f830b45c35cfc80556973f70"
 dependencies = [
  "generic-array 0.14.4",
+ "rand_core 0.6.3",
 ]
 
 [[package]]
@@ -77,9 +78,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.41"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15af2628f6890fe2609a3b91bef4c83450512802e59489f9c1cb1fa5df064a61"
+checksum = "28ae2b3dec75a406790005a200b1bd89785afc02517a00ca99ecfe093ee9e6cf"
 
 [[package]]
 name = "arrayref"
@@ -101,9 +102,9 @@ checksum = "be4dc07131ffa69b8072d35f5007352af944213cde02545e2103680baed38fcd"
 
 [[package]]
 name = "async-trait"
-version = "0.1.50"
+version = "0.1.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b98e84bbb4cbcdd97da190ba0c58a1bb0de2c1fdf67d159e192ed766aeca722"
+checksum = "44318e776df68115a881de9a8fd1b9e53368d7a4a5ce4cc48517da3393233a5e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -130,9 +131,9 @@ checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "backtrace"
-version = "0.3.60"
+version = "0.3.61"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7815ea54e4d821e791162e078acbebfd6d8c8939cd559c9335dceb1c8ca7282"
+checksum = "e7a905d892734eea339e896738c14b9afce22b5318f64b951e70bf3844419b01"
 dependencies = [
  "addr2line",
  "cc",
@@ -173,9 +174,9 @@ checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
 
 [[package]]
 name = "base64ct"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0d27fb6b6f1e43147af148af49d49329413ba781aa0d5e10979831c210173b5"
+checksum = "8a32fd6af2b5827bce66c29053ba0e7c42b9dcab01835835058558c10851a46b"
 
 [[package]]
 name = "bech32"
@@ -194,9 +195,9 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "1.2.1"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "bitvec"
@@ -361,18 +362,19 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.68"
+version = "1.0.69"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a72c244c1ff497a746a7e1fb3d14bd08420ecda70c8f25c7112f2781652d787"
+checksum = "e70cc2f62c6ce1868963827bd677764c62d07c3d9a3e1fb1177ee1a9ab199eb2"
 
 [[package]]
 name = "ccm"
-version = "0.4.0"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62540fbe7b9f9280047764363ab3004301fea9a7822af5bea350826a24ab42d1"
+checksum = "0a9cf981c7e62b6fb02225592ee7ebf221e0b0b5317984a57a1e9d21af20e317"
 dependencies = [
  "aead",
  "cipher",
+ "ctr 0.8.0",
  "subtle",
 ]
 
@@ -417,7 +419,7 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b70e37282d9624283878ffda1d1e53883bcf868cf441bddda44127620b39572d"
 dependencies = [
- "crypto-mac 0.11.0",
+ "crypto-mac 0.11.1",
  "dbl",
 ]
 
@@ -555,9 +557,9 @@ checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
 
 [[package]]
 name = "crypto-bigint"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b32a398eb1ccfbe7e4f452bc749c44d38dd732e9a253f19da224c416f00ee7f4"
+checksum = "09910f0830248af4499907177608b81d640c8c404526f8770b87b765fbd8c9a5"
 dependencies = [
  "generic-array 0.14.4",
  "rand_core 0.6.3",
@@ -577,9 +579,9 @@ dependencies = [
 
 [[package]]
 name = "crypto-mac"
-version = "0.11.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25fab6889090c8133f3deb8f73ba3c65a7f456f66436fc012a1b1e272b1e103e"
+checksum = "b1d1a86f49236c215f271d40892d5fc950490551400b02ef360692c29815c714"
 dependencies = [
  "cipher",
  "generic-array 0.14.4",
@@ -596,10 +598,19 @@ dependencies = [
 ]
 
 [[package]]
-name = "curve25519-dalek"
-version = "3.1.0"
+name = "ctr"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "639891fde0dbea823fc3d798a0fdf9d2f9440a42d64a78ab3488b0ca025117b3"
+checksum = "049bb91fb4aaf0e3c7efa6cd5ef877dbbbd15b39dad06d9948de4ec8a75761ea"
+dependencies = [
+ "cipher",
+]
+
+[[package]]
+name = "curve25519-dalek"
+version = "3.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b9fdf9972b2bd6af2d913799d9ebc165ea4d2e65878e329d9c6b372c4491b61"
 dependencies = [
  "byteorder",
  "digest 0.9.0",
@@ -619,9 +630,9 @@ dependencies = [
 
 [[package]]
 name = "der"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49f215f706081a44cb702c71c39a52c05da637822e9c1645a50b7202689e982d"
+checksum = "31e21d2d0f22cde6e88694108429775c0219760a07779bf96503b434a03d7412"
 dependencies = [
  "const-oid",
 ]
@@ -667,9 +678,9 @@ dependencies = [
 
 [[package]]
 name = "ecdsa"
-version = "0.12.3"
+version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "713c32426287891008edb98f8b5c6abb2130aa043c93a818728fcda78606f274"
+checksum = "43ee23aa5b4f68c7a092b5c3beb25f50c406adc75e2363634f242f28ab255372"
 dependencies = [
  "der",
  "elliptic-curve",
@@ -679,9 +690,9 @@ dependencies = [
 
 [[package]]
 name = "ed25519"
-version = "1.1.1"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d0860415b12243916284c67a9be413e044ee6668247b99ba26d94b2bc06c8f6"
+checksum = "4620d40f6d2601794401d6dd95a5cf69b6c157852539470eeda433a99b3c0efc"
 dependencies = [
  "signature",
 ]
@@ -738,7 +749,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d47d900a7dea08593d398104f8288e37858b0ad714c8d08cd03fdb86563e6402"
 dependencies = [
  "aes",
- "ctr",
+ "ctr 0.7.0",
  "digest 0.9.0",
  "hex",
  "hmac",
@@ -798,7 +809,7 @@ dependencies = [
 
 [[package]]
 name = "ethers"
-version = "0.4.0"
+version = "0.4.1"
 dependencies = [
  "anyhow",
  "ethers-contract",
@@ -867,7 +878,7 @@ dependencies = [
 
 [[package]]
 name = "ethers-core"
-version = "0.4.7"
+version = "0.4.8"
 dependencies = [
  "arrayvec 0.7.1",
  "bincode",
@@ -982,9 +993,9 @@ checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
 
 [[package]]
 name = "ff"
-version = "0.10.0"
+version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63eec06c61e487eecf0f7e6e6372e596a81922c28d33e645d6983ca6493a1af0"
+checksum = "d0f40b2dcd8bc322217a5f6559ae5f9e9d1de202a2ecee2e9eafcbece7562a4f"
 dependencies = [
  "rand_core 0.6.3",
  "subtle",
@@ -1041,9 +1052,9 @@ checksum = "fed34cd105917e91daa4da6b3728c47b068749d6a62c59811f06ed2ac71d9da7"
 
 [[package]]
 name = "futures"
-version = "0.3.15"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e7e43a803dae2fa37c1f6a8fe121e1f7bf9548b4dfc0522a42f34145dadfc27"
+checksum = "1adc00f486adfc9ce99f77d717836f0c5aa84965eb0b4f051f4e83f7cab53f8b"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1184,9 +1195,9 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.24.0"
+version = "0.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0e4075386626662786ddb0ec9081e7c7eeb1ba31951f447ca780ef9f5d568189"
+checksum = "f0a01e0497841a3b2db4f8afa483cce65f7e96a3498bd6c541734792aeac8fe7"
 
 [[package]]
 name = "glob"
@@ -1274,7 +1285,7 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a2a2320eb7ec0ebe8da8f744d7812d9fc4cb4d09344ac01898dbcb6a20ae69b"
 dependencies = [
- "crypto-mac 0.11.0",
+ "crypto-mac 0.11.1",
  "digest 0.9.0",
 ]
 
@@ -1291,9 +1302,9 @@ dependencies = [
 
 [[package]]
 name = "http-body"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60daa14be0e0786db0f03a9e57cb404c9d756eed2b6c62b9ea98ec5743ec75a9"
+checksum = "399c583b2979440c60be0821a6199eca73bc3c8dcd9d070d75ac726e2c6186e5"
 dependencies = [
  "bytes",
  "http",
@@ -1314,9 +1325,9 @@ checksum = "6456b8a6c8f33fee7d958fcd1b60d55b11940a79e63ae87013e6d22e26034440"
 
 [[package]]
 name = "hyper"
-version = "0.14.9"
+version = "0.14.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07d6baa1b441335f3ce5098ac421fb6547c46dda735ca1bc6d0153c838f9dd83"
+checksum = "0b61cf2d1aebcf6e6352c97b81dc2244ca29194be1b276f5d8ad5c6330fffb11"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -1437,9 +1448,9 @@ checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
 
 [[package]]
 name = "js-sys"
-version = "0.3.51"
+version = "0.3.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83bdfbace3a0e81a4253f73b49e960b053e396a11012cbd49b9b74d6a2b67062"
+checksum = "ce791b7ca6638aae45be056e068fc756d871eb3b3b10b8efa62d1c9cec616752"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -1471,9 +1482,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.97"
+version = "0.2.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12b8adadd720df158f4d70dfe7ccc6adb0472d7c55ca83445f6a5ab3e36f8fb6"
+checksum = "a7f823d141fe0a24df1e23b4af4e3c7ba9e5966ec514ea068c93024aa7deb765"
 
 [[package]]
 name = "libusb1-sys"
@@ -1507,9 +1518,9 @@ dependencies = [
 
 [[package]]
 name = "matches"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
+checksum = "a3e378b66a060d48947b590737b30a1be76706c8dd7b8ba0f2fe3989c68a853f"
 
 [[package]]
 name = "md-5"
@@ -1568,9 +1579,9 @@ dependencies = [
 
 [[package]]
 name = "native-tls"
-version = "0.2.7"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8d96b2e1c8da3957d58100b09f102c6d9cfdfced01b7ec5a8974044bb09dbd4"
+checksum = "48ba9f7719b5a0f42f338907614285fb5fd70e53858141f69898a1fb7203b24d"
 dependencies = [
  "lazy_static",
  "libc",
@@ -1637,9 +1648,9 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.25.3"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a38f2be3697a57b4060074ff41b44c16870d916ad7877c17696e063257482bc7"
+checksum = "c55827317fb4c08822499848a14237d2874d6f139828893017237e7ab93eb386"
 dependencies = [
  "memchr",
 ]
@@ -1744,9 +1755,9 @@ dependencies = [
 
 [[package]]
 name = "password-hash"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1a5d4e9c205d2c1ae73b84aab6240e98218c0e72e63b50422cfb2d1ca952282"
+checksum = "fd482dfb8cfba5a93ec0f91e1c0f66967cb2fdc1a8dba646c4f9202c5d05d785"
 dependencies = [
  "base64ct",
  "rand_core 0.6.3",
@@ -1760,7 +1771,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d95f5254224e617595d2cc3cc73ff0a5eaf2637519e25f03388154e9378b6ffa"
 dependencies = [
  "base64ct",
- "crypto-mac 0.11.0",
+ "crypto-mac 0.11.1",
  "hmac",
  "password-hash",
  "sha2 0.9.5",
@@ -1774,18 +1785,18 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
 [[package]]
 name = "pin-project"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7509cc106041c40a4518d2af7a61530e1eed0e6285296a3d8c5472806ccc4a4"
+checksum = "576bc800220cc65dac09e99e97b08b358cfab6e17078de8dc5fee223bd2d0c08"
 dependencies = [
  "pin-project-internal",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c950132583b500556b1efd71d45b319029f2b71518d979fcc208e16b42426f"
+checksum = "6e8fe8163d14ce7f0cdac2e040116f22eac817edabff0be91e8aff7e9accf389"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1806,9 +1817,9 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
 name = "pkcs8"
-version = "0.7.0"
+version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09d156817ae0125e8aa5067710b0db24f0984830614f99875a70aa5e3b74db69"
+checksum = "fbee84ed13e44dd82689fa18348a49934fa79cc774a344c42fc9b301c71b140a"
 dependencies = [
  "der",
  "spki",
@@ -1887,9 +1898,9 @@ checksum = "bc881b2c22681370c6a780e47af9840ef841837bc98118431d4e1868bd0c1086"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.27"
+version = "1.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
+checksum = "5c7ed8b8c7b886ea3ed7dde405212185f423ab44682667c8c6dd14aa1d9f6612"
 dependencies = [
  "unicode-xid",
 ]
@@ -1998,9 +2009,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.9"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ab49abadf3f9e1c4bc499e8845e152ad87d2ad2d30371841171169e9d75feee"
+checksum = "8383f39639269cde97d255a32bdb68c047337295414940c68bdd30c2e13203ff"
 dependencies = [
  "bitflags",
 ]
@@ -2283,9 +2294,9 @@ checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
 [[package]]
 name = "salsa20"
-version = "0.8.0"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1c7c5f10864beba947e1a1b43f3ef46c8cc58d1c2ae549fa471713e8ff60787a"
+checksum = "ecbd2eb639fd7cab5804a0837fe373cc2172d15437e804c054a9fb885cb923b0"
 dependencies = [
  "cipher",
 ]
@@ -2358,9 +2369,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.126"
+version = "1.0.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
+checksum = "f03b9878abf6d14e6779d3f24f07b2cfa90352cfec4acc5aab8f1ac7f146fae8"
 dependencies = [
  "serde_derive",
 ]
@@ -2377,9 +2388,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.126"
+version = "1.0.127"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
+checksum = "a024926d3432516606328597e0f224a51355a493b49fdd67e9209187cbe55ecc"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2388,9 +2399,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.64"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "799e97dc9fdae36a5c8b8f2cae9ce2ee9fdce2058c57a93e6099d919fd982f79"
+checksum = "336b10da19a12ad094b59d870ebde26a45402e5b470add4b5fd03c5048a32127"
 dependencies = [
  "itoa",
  "ryu",
@@ -2411,9 +2422,9 @@ dependencies = [
 
 [[package]]
 name = "sha-1"
-version = "0.9.6"
+version = "0.9.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c4cfa741c5832d0ef7fab46cabed29c2aae926db0b11bb2069edd8db5e64e16"
+checksum = "1a0c8611594e2ab4ebbf06ec7cbbf0a99450b8570e96cbf5188b5d5f6ef18d81"
 dependencies = [
  "block-buffer 0.9.0",
  "cfg-if 1.0.0",
@@ -2461,9 +2472,9 @@ dependencies = [
 
 [[package]]
 name = "sharded-slab"
-version = "0.1.1"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79c719719ee05df97490f80a45acfc99e5a30ce98a1e4fb67aee422745ae14e3"
+checksum = "740223c51853f3145fe7c90360d2d4232f2b62e3449489c207eccde818979982"
 dependencies = [
  "lazy_static",
 ]
@@ -2508,9 +2519,9 @@ dependencies = [
 
 [[package]]
 name = "slab"
-version = "0.4.3"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f173ac3d1a7e3b28003f40de0b5ce7fe2710f9b9dc3fc38664cebee46b3b6527"
+checksum = "c307a32c1c5c437f38c7fd45d753050587732ba8628319fbdf12a7e289ccc590"
 
 [[package]]
 name = "smallvec"
@@ -2520,9 +2531,9 @@ checksum = "fe0f37c9e8f3c5a4a66ad655a93c74daac4ad00c441533bf5c6e7990bb42604e"
 
 [[package]]
 name = "socket2"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e3dfc207c526015c632472a77be09cf1b6e46866581aecae5cc38fb4235dea2"
+checksum = "765f090f0e423d2b55843402a07915add955e7d60657db13707a159727326cad"
 dependencies = [
  "libc",
  "winapi",
@@ -2551,15 +2562,15 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "subtle"
-version = "2.4.0"
+version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
+checksum = "6bdef32e8150c2a081110b42772ffe7d7c9032b606bc226c8260fd97e0976601"
 
 [[package]]
 name = "syn"
-version = "1.0.73"
+version = "1.0.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f71489ff30030d2ae598524f61326b902466f72a0fb1a8564c001cc63425bcc7"
+checksum = "1873d832550d4588c3dbc20f01361ab00bfe741048f71e3fecf145a7cc18b29c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2568,9 +2579,9 @@ dependencies = [
 
 [[package]]
 name = "synstructure"
-version = "0.12.4"
+version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b834f2d66f734cb897113e34aaff2f1ab4719ca946f9a7358dba8f8064148701"
+checksum = "474aaa926faa1603c40b7885a9eaea29b444d1cb2850cb7c0e37bb1a4182f4fa"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2648,9 +2659,9 @@ dependencies = [
 
 [[package]]
 name = "tinyvec"
-version = "1.2.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b5220f05bb7de7f3f53c7c065e1199b3172696fe2db9f9c4d8ad9b4ee74c342"
+checksum = "848a1e1181b9f6753b5e96a092749e29b11d19ede67dfbbd6c7dc7e0f49b5338"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -2663,9 +2674,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "1.8.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "570c2eb13b3ab38208130eccd41be92520388791207fde783bda7c1e8ace28d4"
+checksum = "01cf844b23c6131f624accf65ce0e4e9956a8bb329400ea5bcc26ae3a5c20b0b"
 dependencies = [
  "autocfg",
  "bytes",
@@ -2682,9 +2693,9 @@ dependencies = [
 
 [[package]]
 name = "tokio-macros"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c49e3df43841dafb86046472506755d8501c5615673955f6aa17181125d13c37"
+checksum = "54473be61f4ebe4efd09cec9bd5d16fa51d70ea0192213d754d2d500457db110"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2894,12 +2905,9 @@ dependencies = [
 
 [[package]]
 name = "unicode-bidi"
-version = "0.3.5"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eeb8be209bb1c96b7c177c7420d26e04eccacb0eeae6b980e35fcb74678107e0"
-dependencies = [
- "matches",
-]
+checksum = "246f4c42e67e7a4e3c6106ff716a5d067d4132a642840b242e357e468a2a0085"
 
 [[package]]
 name = "unicode-normalization"
@@ -2992,9 +3000,9 @@ checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.74"
+version = "0.2.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d54ee1d4ed486f78874278e63e4069fc1ab9f6a18ca492076ffb90c5eb2997fd"
+checksum = "b608ecc8f4198fe8680e2ed18eccab5f0cd4caaf3d83516fa5fb2e927fda2586"
 dependencies = [
  "cfg-if 1.0.0",
  "serde",
@@ -3004,9 +3012,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.74"
+version = "0.2.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b33f6a0694ccfea53d94db8b2ed1c3a8a4c86dd936b13b9f0a15ec4a451b900"
+checksum = "580aa3a91a63d23aac5b6b267e2d13cb4f363e31dce6c352fca4752ae12e479f"
 dependencies = [
  "bumpalo",
  "lazy_static",
@@ -3019,9 +3027,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.24"
+version = "0.4.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5fba7978c679d53ce2d0ac80c8c175840feb849a161664365d1287b41f2e67f1"
+checksum = "16646b21c3add8e13fdb8f20172f8a28c3dbf62f45406bcff0233188226cfe0c"
 dependencies = [
  "cfg-if 1.0.0",
  "js-sys",
@@ -3031,9 +3039,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.74"
+version = "0.2.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "088169ca61430fe1e58b8096c24975251700e7b1f6fd91cc9d59b04fb9b18bd4"
+checksum = "171ebf0ed9e1458810dfcb31f2e766ad6b3a89dbda42d8901f2b268277e5f09c"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -3041,9 +3049,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.74"
+version = "0.2.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be2241542ff3d9f241f5e2cb6dd09b37efe786df8851c54957683a49f0987a97"
+checksum = "6c2657dd393f03aa2a659c25c6ae18a13a4048cebd220e147933ea837efc589f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3054,15 +3062,15 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.74"
+version = "0.2.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7cff876b8f18eed75a66cf49b65e7f967cb354a7aa16003fb55dbfd25b44b4f"
+checksum = "2e0c4a743a309662d45f4ede961d7afa4ba4131a59a639f29b0069c3798bbcc2"
 
 [[package]]
 name = "web-sys"
-version = "0.3.51"
+version = "0.3.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e828417b379f3df7111d3a2a9e5753706cae29c41f7c4029ee9fd77f3e09e582"
+checksum = "01c70a82d842c9979078c772d4a1344685045f1a5628f677c2b2eab4dd7d2696"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
diff --git a/ethers-core/Cargo.toml b/ethers-core/Cargo.toml
index 7dc7e902..c92eacf7 100644
--- a/ethers-core/Cargo.toml
+++ b/ethers-core/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "ethers-core"
 license = "MIT OR Apache-2.0"
-version = "0.4.7"
+version = "0.4.8"
 authors = ["Georgios Konstantopoulos <me@gakonst.com>"]
 edition = "2018"
 description = "Core structures for the ethers-rs crate"
@@ -45,8 +45,9 @@ hex-literal = "0.3.3"
 futures-util = { version = "0.3.16" }
 
 [features]
-celo = [] # celo support extends the transaction format with extra fields
+celo = ["legacy"] # celo support extends the transaction format with extra fields
 setup = ["tokio", "futures-util"] # async support for concurrent setup
+legacy = []
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/ethers/Cargo.toml b/ethers/Cargo.toml
index b88d6c9f..ef34940c 100644
--- a/ethers/Cargo.toml
+++ b/ethers/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ethers"
-version = "0.4.0"
+version = "0.4.1"
 authors = ["Georgios Konstantopoulos <me@gakonst.com>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
@@ -26,8 +26,10 @@ celo = [
     "ethers-signers/celo",
     "ethers-contract/celo",
     "ethers-middleware/celo",
+    "legacy"
 ]
 
+legacy = ["ethers-core/legacy", "ethers-contract/legacy"]
 ledger = ["ethers-signers/ledger"]
 yubi = ["ethers-signers/yubi"]
 ws = ["ethers-providers/ws"]
@@ -35,7 +37,7 @@ abigen = ["ethers-contract/abigen"]
 
 [dependencies]
 ethers-contract = { version = "0.4.7", path = "../ethers-contract" }
-ethers-core = { version = "0.4.6", path = "../ethers-core", features = ["setup"] }
+ethers-core = { version = "0.4.8", path = "../ethers-core", features = ["setup"] }
 ethers-providers = { version = "0.4.6", path = "../ethers-providers" }
 ethers-signers = { version = "0.4.6", path = "../ethers-signers" }
 ethers-middleware = { version = "0.4.8", path = "../ethers-middleware" }