..._tx.get_receipt().await?;
println!(
"Transaction included in block {}",
receipt.block_number.expect("Failed to get block number")
);
println!(
"Transferred {:.5} ETH to {recipient_address}",
format_ether(value)
);
let after_balance = p...
...that they are in ABI-encoded format
> 
contract地址:
https://ropsten.etherscan.io/address/0xf1f763436a7cb1cbaad968957b444f263406bdd2#code
contract code is following:
```
pragma solidit...