Sending Ether (transfer, send, call) in Blockchain / Solidity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send 1 ether using the transfer method.

Blockchain / Solidity

payable(msg.sender).[1](1 ether);

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Acall

Bsend

CsendValue

Dtransfer

Attempts:

3 left

💡 Hint

Common Mistakes

Using send instead of transfer without checking return value.

The transfer method sends Ether and reverts on failure.

2fill in blank

medium

Complete the code to send 0.5 ether using the send method and check success.

Blockchain / Solidity

bool success = payable(receiver).[1](0.5 ether);

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Atransfer

Bcall

Csend

DsendValue

Attempts:

3 left

💡 Hint

Common Mistakes

Not checking the boolean result of send.

The send method returns a boolean indicating success or failure.

3fill in blank

hard

Fix the error in sending Ether using call and check for success.

Blockchain / Solidity

(bool sent, ) = payable(receiver).[1]{value: amount}(''); require(sent, 'Failed to send Ether');

Drag options to blanks, or click blank then click option'

Acall

Btransfer

Csend

DsendValue

Attempts:

3 left

💡 Hint

Common Mistakes

Using transfer or send with call syntax.

The call method is the recommended way to send Ether with gas forwarding and returns success status.

4fill in blank

hard

Fill both blanks to send Ether safely using call and handle failure.

Blockchain / Solidity

([1], ) = payable(receiver).[2]{value: msg.value}(''); require([1], 'Send failed');

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Asent

Bsend

Ccall

Dtransfer

Attempts:

3 left

💡 Hint

Common Mistakes

Using transfer or send with call syntax.

Use call to send Ether and store the success boolean in sent.

5fill in blank

hard

Fill all three blanks to create a function that sends Ether using call and reverts on failure.

Blockchain / Solidity

function sendEther(address payable receiver) public payable { (bool [1], bytes memory [2]) = receiver.[3]{value: msg.value}(''); require([1], 'Failed to send Ether'); }

Drag options to blanks, or click blank then click option'

Asuccess

Bdata

Ccall

Dsend

Attempts:

3 left

💡 Hint

Common Mistakes

Using send or transfer instead of call in this pattern.

Use call to send Ether, capture success and data, and require success.