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EVM Address

Icon LinkEvmAddress

An Ethereum Virtual Machine (EVM) Address can be represented using the EvmAddress type. It's definition matches the Sway standard library type being a Struct wrapper around an inner Bits256 value. 

// #import { EvmAddress };
 
const evmAddress: EvmAddress = {
  value: Bits256,
};

Icon LinkCreating an EVM Address

An EVM Address only has 20 bytes therefore the first 12 bytes of the Bits256 value are set to 0. Within the SDK, an Address can be instantiated and converted to a wrapped and Sway compatible EVM Address using the toEvmAddress() function: 

// #import { EvmAddress, Address };
 
const b256Address = '0xbebd3baab326f895289ecbd4210cf886ce41952316441ae4cac35f00f0e882a6';
 
const address = Address.fromB256(b256Address);
 
const evmAddress: EvmAddress = address.toEvmAddress();

Icon LinkUsing an EVM Address

The EvmAddress type can be integrated with your contract calls. Consider the following contract that can compare and return an EVM Address: 

contract;
 
use std::vm::evm::evm_address::EvmAddress;
 
configurable {
    B256_ADDR: b256 = 0xbebd3baab326f895289ecbd4210cf886ce41952316441ae4cac35f00f0e882a6,
}
 
abi EvmTest {
    fn echo_address() -> EvmAddress;
    fn echo_address_comparison(evm_addr: EvmAddress) -> bool;
}
 
impl EvmTest for Contract {
    fn echo_address() -> EvmAddress {
        return EvmAddress::from(B256_ADDR);
    }
 
    fn echo_address_comparison(evm_addr: EvmAddress) -> bool {
        let evm_addr2 = EvmAddress::from(B256_ADDR);
 
        evm_addr == evm_addr2
    }
}

The EvmAddress type can be used with the SDK and passed to the contract function as follows: 

// #import { EvmAddress };
 
const evmAddress: EvmAddress = {
  value: Bits256,
};
 
const { value } = await contract.functions.echo_address_comparison(evmAddress).simulate();
 
expect(value).toBeTruthy();

And to validate the returned value: 

// #import { EvmAddress };
 
const evmAddress: EvmAddress = {
  value: Bits256,
};
 
const { value } = await contract.functions.echo_address().simulate();
 
expect(value).toEqual(evmAddress);