Module "wallet_abi" could not be found

[sarthak]

 
abi Wallet {
    #[storage(read, write), payable]
    fn receive_funds();
 
    #[storage(read, write)]
    fn send_funds(amount_to_send: u64, recipient_address: Address);
}

use std::{
    asset::transfer_to_address,
    call_frames::msg_asset_id,
    constants::BASE_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() == BASE_ASSET_ID {
            // If we received `BASE_ASSET_ID` 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_to_address()` is not a call and thus not an
        // interaction. Regardless, this code conforms to
        // checks-effects-interactions to avoid re-entrancy.
        transfer_to_address(recipient_address, BASE_ASSET_ID, amount_to_send);
    }
}```

I've been trying to learn sway via examples given in the docs but stuck at this error. Am i making any syntactical error or missing out on something?

[nick]

In Sway, each file must contain a single library, predicate, script or contract. In the code you provided, you are combining a library, without specifying it as the context, in the same file as a contract without specifying it and then trying to import the library.

This example combines the ABI interface in the library with the contract correctly, in a single file:

contract;

use std::{
    asset::transfer_to_address,
    call_frames::msg_asset_id,
    constants::BASE_ASSET_ID,
    context::msg_amount,
};

const OWNER_ADDRESS = Address::from(0x8900c5bec4ca97d4febf9ceb4754a60d782abbf3cd815836c1872116f203f861);
 
abi Wallet {
    #[storage(read, write), payable]
    fn receive_funds();
 
    #[storage(read, write)]
    fn send_funds(amount_to_send: u64, recipient_address: Address);
}

storage {
    balance: u64 = 0,
}
 
impl Wallet for Contract {
    #[storage(read, write), payable]
    fn receive_funds() {
        if msg_asset_id() == BASE_ASSET_ID {
            // If we received `BASE_ASSET_ID` 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_to_address()` is not a call and thus not an
        // interaction. Regardless, this code conforms to
        // checks-effects-interactions to avoid re-entrancy.
        transfer_to_address(recipient_address, BASE_ASSET_ID, amount_to_send);
    }
}