# Ethereum core types
The crate defines the rust mapping of [`enthereum core types`](https://docs.soliditylang.org/en/v0.8.17/abi-spec.html?highlight=event#mapping-solidity-to-abi-types).
| `uint<M>`/`int<M>` | [`crate::IntM`](./src/primitives/int.rs) | support|
| `bytes<M>` | [`crate::BytesM`](./src/primitives/bytes.rs) | support|
| `bytes` | [`crate::Bytes`](./src/primitives/bytes.rs) | support|
| `address` | [`crate::Bytes`](./src/primitives/address.rs) | support|
| bool | `bool` | support|
| `<type>[M]` | `[T;N]/&[T;N]` | support|
| `<type>[]` | `Vec<T>/&[T]` | support|
| `fixed<M>x<N>` | | working on|
| `(T1,T2,...,Tn)` | `(T1,T2,...,Tn)/struct A(T1,T2,...,Tn)/struct A { t1:T1,t2:T2,...,t3:Tn }` | support|
## With serde
This crate using [`serde`](https://serde.rs/) framework to handle contract abi serialize/deserilize. Therefore, it is easy to define the structure that supports the `Ethereum ABI`.
```rust
use ethers_types_rs::*;
#[derive(Debug,Serialize,Deserilize)]
struct Transfer {
to: Address,
amount: U256,
}
```
## EIP712 support
Again, thanks to the good framework design of [`serde`](https://serde.rs/).
this crate define a series of [`serializers`](src/serde/eip712) to support eip712 protocol.
```rust
let domain = json!({
"name": "Ether Mail",
"version": "1",
"chainId": 1,
"verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
});
let domain: EIP712Domain = serde_json::from_value(domain).unwrap();
assert_eq!(
eip712_hash_struct(&domain).unwrap().to_eth_hex(),
"0xf2cee375fa42b42143804025fc449deafd50cc031ca257e0b194a650a912090f"
);
#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Person {
pub name: String,
pub wallet: Address,
}
#[derive(Debug, Serialize, Deserialize, PartialEq)]
struct Mail {
pub from: Person,
pub to: Person,
pub contents: String,
}
let json = json!({
"from": {
"name": "Cow",
"wallet": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826"
},
"to": {
"name": "Bob",
"wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB"
},
"contents": "Hello, Bob!"
});
let mail: Mail = serde_json::from_value(json).expect("parse domain");
assert_eq!(
"Mail(Person from,Person to,string contents)Person(string name,address wallet)",
eip712_encode_type(&mail).expect("generate e712 types")
);
assert_eq!(
eip712_hash_struct(&mail.from).unwrap().to_eth_hex(),
"0xfc71e5fa27ff56c350aa531bc129ebdf613b772b6604664f5d8dbe21b85eb0c8"
);
assert_eq!(
eip712_hash_struct(&mail.to).unwrap().to_eth_hex(),
"0xcd54f074a4af31b4411ff6a60c9719dbd559c221c8ac3492d9d872b041d703d1"
);
assert_eq!(
eip712_hash_struct(&mail).unwrap().to_eth_hex(),
"0xc52c0ee5d84264471806290a3f2c4cecfc5490626bf912d01f240d7a274b371e"
);
assert_eq!(
eip712_encode(&domain, &mail).unwrap().to_eth_hex(),
"0x1901f2cee375fa42b42143804025fc449deafd50cc031ca257e0b194a650a912090fc52c0ee5d84264471806290a3f2c4cecfc5490626bf912d01f240d7a274b371e"
);
let expect_request: TypedData<Mail> =
serde_json::from_str(include_str!("./eip712.json")).unwrap();
assert_eq!(eip712_into_request(domain, mail).unwrap(), expect_request);
```