ethereum: implement schnorr verification contract deployment and related crypto (#36)

* basic schnorr verify working

* add schnorr-verify as submodule

* remove previous code

* Misc Ethereum work which will probably be disregarded

* add ecrecover hack test, worksgit add src/

* merge w develop

* starting w/ rust-web3

* trying to use ethers

* deploy_schnorr_verifier_contract finally working

* modify EthereumHram to use 27/28 for point parity

* updated address calc, solidity schnorr verify now working

* add verify failure to test

* update readme

* move ethereum/ to coins/

* un fmt coins/monero

* update .gitmodules

* fix cargo paths

* fix coins/monero

* add #[allow(non_snake_case)]

* un-fmt stuff

* move crypto to coins/ethereum

* move unit tests to ethereum/tests

* remove js, build w ethers

* update .gitignore

* address comments

* add q != 0 check

* update contract param order

* update contract license to AGPL

* update ethereum-serai license to GPL and fmt

* GPLv3 for ethereum-serai

* AGPLv3 for ethereum-serai

* actually fix license

Co-authored-by: Luke Parker <lukeparker5132@gmail.com>

coins/ethereum/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "ethereum-serai"
+version = "0.1.0"
+description = "An Ethereum library supporting Schnorr signing and on-chain verification"
+license = "AGPL-3.0-only"
+authors = ["Luke Parker <lukeparker5132@gmail.com>", "Elizabeth Binks <elizabethjbinks@gmail.com>"]
+edition = "2021"
+
+[dependencies]
+thiserror = "1"
+serde_json = "1.0"
+serde = "1.0"
+hex-literal = "0.3"
+
+ethers = { git = "https://github.com/gakonst/ethers-rs", features = ["abigen", "ethers-solc"] }
+eyre = "0.6"
+
+k256 = { version = "0.11", features = ["arithmetic", "keccak256", "ecdsa"] }
+frost = { package = "modular-frost", path = "../../crypto/frost", features = ["secp256k1"] }
+sha3 = "0.10"
+group = "0.12"
+
+[dev-dependencies]
+rand = "0.8"
+tokio = { version = "1.19", features = ["macros"] }
+
+[build-dependencies]
+ethers-solc = { git = "https://github.com/gakonst/ethers-rs" }