check-send-result.md

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check-send-result

The {"extends": "solhint:recommended"} property in a configuration file enables this rule.

Description

Check result of "send" call.

Options

This rule accepts a string option of rule severity. Must be one of "error", "warn", "off". Default to warn.

Example Config

{
  "rules": {
    "check-send-result": "warn"
  }
}

Notes

• Rule will rise false positive on this: bool success = walletAddress.send(amount); require(success, "Failed to send");
• Rule will skip ERC777 "send" function to prevent false positives

Examples

👍 Examples of correct code for this rule

result of "send" call checked with if statement

if(x.send(55)) {}

result of "send" call checked within a require

require(payable(walletAddress).send(moneyAmount), "Failed to send moneyAmount");

👎 Examples of incorrect code for this rule

result of "send" call ignored

x.send(55);

Version

This rule was introduced in Solhint 2.0.0-alpha.0

Resources

• Rule source
• Document source
• Test cases