The ABI declaration is a separate project from your ABI implementation. The project structure for the code should be organized as follows with the wallet_abi treated as an external library:
.
├── wallet_abi
│ ├── Forc.toml
│ └── src
│ └── main.sw
└── wallet_smart_contract
├── Forc.toml
└── src
└── main.sw It's also important to specify the source of the dependency within the project's Forc.toml file when using external libraries. Inside the wallet_smart_contract project, it requires a declaration like this:
[dependencies]
wallet_abi = { path = "../wallet_abi/" }library;
abi Wallet {
#[storage(read, write), payable]
fn receive_funds();
#[storage(read, write)]
fn send_funds(amount_to_send: u64, recipient_address: Address);
}contract;
use std::{asset::transfer, call_frames::msg_asset_id, context::msg_amount,};
use wallet_abi::Wallet;
const OWNER_ADDRESS = Address::from(0x8900c5bec4ca97d4febf9ceb4754a60d782abbf3cd815836c1872116f203f861);
storage {
balance: u64 = 0,
}
impl Wallet for Contract {
#[storage(read, write), payable]
fn receive_funds() {
if msg_asset_id() == AssetId::base() {
// If we received the base asset then keep track of the balance.
// Otherwise, we're receiving other native assets and don't care
// about our balance of coins.
storage.balance.write(storage.balance.read() + msg_amount());
}
}
#[storage(read, write)]
fn send_funds(amount_to_send: u64, recipient_address: Address) {
let sender = msg_sender().unwrap();
match sender {
Identity::Address(addr) => assert(addr == OWNER_ADDRESS),
_ => revert(0),
};
let current_balance = storage.balance.read();
assert(current_balance >= amount_to_send);
storage.balance.write(current_balance - amount_to_send);
// Note: `transfer()` is not a call and thus not an
// interaction. Regardless, this code conforms to
// checks-effects-interactions to avoid re-entrancy.
transfer(
Identity::Address(recipient_address),
AssetId::base(),
amount_to_send,
);
}
}