Remove ethers mono-crate

Reduces size of ethereum-serai and gives us clarity on what's used.

Next should be rmeoving the ethers-provided signing code.

coins/ethereum/Cargo.toml

@@ -13,25 +13,28 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-thiserror = "1"
-rand_core = "0.6"
+thiserror = { version = "1", default-features = false }
+eyre = { version = "0.6", default-features = false }
 
-serde_json = "1"
-serde = "1"
+serde_json = { version = "1", default-features = false, features = ["std"] }
 
-sha2 = "0.10"
-sha3 = "0.10"
+sha3 = { version = "0.10", default-features = false, features = ["std"] }
 
-group = "0.13"
-k256 = { version = "^0.13.1", default-features = false, features = ["std", "arithmetic", "bits", "ecdsa"] }
+group = { version = "0.13", default-features = false }
+k256 = { version = "^0.13.1", default-features = false, features = ["std", "ecdsa"] }
 frost = { package = "modular-frost", path = "../../crypto/frost", features = ["secp256k1", "tests"] }
 
-eyre = "0.6"
-
-ethers = { version = "2", default-features = false, features = ["abigen", "ethers-solc"] }
+ethers-core = { version = "2", default-features = false }
+ethers-signers = { version = "2", default-features = false }
+ethers-middleware = { version = "2", default-features = false }
+ethers-providers = { version = "2", default-features = false }
+ethers-contract = { version = "2", default-features = false, features = ["abigen", "providers"] }
+ethers-solc = { version = "2", default-features = false }
 
 [build-dependencies]
 ethers-solc = { version = "2", default-features = false }
 
 [dev-dependencies]
+rand_core = { version = "0.6", default-features = false, features = ["std"] }
+sha2 = { version = "0.10", default-features = false, features = ["std"] }
 tokio = { version = "1", features = ["macros"] }

coins/ethereum/src/contract.rs

@@ -1,9 +1,15 @@
-use crate::crypto::ProcessedSignature;
-use ethers::{contract::ContractFactory, prelude::*, solc::artifacts::contract::ContractBytecode};
-use eyre::{eyre, Result};
-use std::fs::File;
-use std::sync::Arc;
+use std::{sync::Arc, fs::File};
+
 use thiserror::Error;
+use eyre::{eyre, Result};
+
+use ethers_signers::LocalWallet;
+use ethers_middleware::SignerMiddleware;
+use ethers_providers::{Provider, Http};
+use ethers_contract::{abigen, ContractFactory};
+use ethers_solc::artifacts::contract::ContractBytecode;
+
+use crate::crypto::ProcessedSignature;
 
 #[derive(Error, Debug)]
 pub enum EthereumError {
@@ -11,11 +17,7 @@ pub enum EthereumError {
   VerificationError,
 }
 
-abigen!(
-  Schnorr,
-  "./artifacts/Schnorr.sol/Schnorr.json",
-  event_derives(serde::Deserialize, serde::Serialize),
-);
+abigen!(Schnorr, "./artifacts/Schnorr.sol/Schnorr.json",);
 
 pub async fn deploy_schnorr_verifier_contract(
   client: Arc<SignerMiddleware<Provider<Http>, LocalWallet>>,

coins/ethereum/src/crypto.rs

@@ -11,7 +11,7 @@ use k256::{
 use frost::{algorithm::Hram, curve::Secp256k1};
 
 pub fn keccak256(data: &[u8]) -> [u8; 32] {
-  Keccak256::digest(data).try_into().unwrap()
+  Keccak256::digest(data).into()
 }
 
 pub fn hash_to_scalar(data: &[u8]) -> Scalar {

coins/ethereum/tests/contract.rs

@@ -4,10 +4,10 @@ use rand_core::OsRng;
 
 use ::k256::{elliptic_curve::bigint::ArrayEncoding, U256};
 
-use ethers::{
-  prelude::*,
-  utils::{keccak256, Anvil, AnvilInstance},
-};
+use ethers_core::utils::{keccak256, Anvil, AnvilInstance};
+use ethers_middleware::{Middleware, SignerMiddleware};
+use ethers_providers::{Provider, Http};
+use ethers_signers::LocalWallet;
 
 use frost::{
   curve::Secp256k1,