I was trying to call the ckSepoliaUSDC but I got an error

Developers
1

TypeError: interfaceFactory is not a function ?

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Screenshot 2024-10-07 at 2.36.52 PM1338×1166 178 KB

check code sample

2

I’ve modified your code and integrated it with @ic-reactor/react.

You can check out the updated sandbox.

1 Like
3

Do you know to to get my usdc address for deposit from external wallet?

4

You need to convert user principal into bytes32 format, Please take a look at this tutorial:

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5

what I mean is when I go to binance account and withdraw to a wallet like 0xb7d95e0837fa3a722e28003bae44dd2011e6832f which is a USC wallet. How can I generate such an address?

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6

You cannot generate an Ethereum address using Internet Identity because it currently doesn’t support signing Ethereum transactions.

To create an Ethereum wallet within the ICP ecosystem, you need to develop a canister smart contract. Use the ecdsa_public_key to generate an Ethereum address and sign_with_ecdsa for signing transactions.

For a wallet that interacts with ck tokens, you only need an interface to call the ckMinter canister and the ckUSDC canister directly from the frontend.

Note: To mint ck tokens, you need a bytes32 address and then call a helper smart contract on Ethereum.

1 Like
7

ok, s I can just call this from my backend

use b3_utils::{vec_to_hex_string_with_0x, Subaccount};
use candid::Principal;

#[ic_cdk::query]
fn deposit_principal(principal: String) -> String {
    let principal = Principal::from_text(principal).unwrap();
    let subaccount = Subaccount::from_principal(principal);

    let bytes32 = subaccount.to_bytes32().unwrap();

    vec_to_hex_string_with_0x(bytes32)
}