pub async fn setup_src20_mock(
wallet: &Wallet<Unlocked<PrivateKeySigner>>,
) -> (Src20Mock<Wallet<Unlocked<PrivateKeySigner>>>, ContractId)pub async fn setup_src20_mock(
wallet: &Wallet<Unlocked<PrivateKeySigner>>,
) -> (Src20Mock<Wallet<Unlocked<PrivateKeySigner>>>, ContractId)