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This article mainly introduces "how to convert address into address payable". In daily operation, I believe many people have doubts about how to convert address into address payable. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the questions of "how to convert address into address payable". Next, please follow the editor to study!

Solidity 0.5 subdivides address types into address and address payable to help force smart contract developers to seriously consider whether an address should receive etheric currency, and if the address does not need to receive etheric currency at all, then the address type should be used. When an address is declared to be of type address, if a developer tries to transfer etheric currency to that address, it will cause a compile-time type error.

Both the address and address payable types are used to store 160bit Ethernet Square addresses, and the difference exists only at compile time, but not in the compiled contract code-that is, the only purpose of introducing address type segmentation is to help developers figure out the actual use of an address at compile time.

Variables of both address payable and address types represent the Ethernet address, and you can use the underlying .call () method. Literally, address payable represents the address that can be used for payment, so on variables of type address payable, you can use .transfer () and .send () methods, but variables of type address cannot use these methods.

Therefore, the address payable type is more powerful than the address type and is easy to understand, the conversion from address payable to address type is easier (degraded), while the conversion from address type to address payable type requires a slight U-turn.

1. Convert address payable to address

Variables of type address payable can be explicitly or implicitly converted to type address:

Address payable addr1 = msg.sender;address addr2 = addr1; / / correct address addr3 = address (addr1); / / correct 2, address converted to address payable

Variables of type address can only be explicitly converted to address payable, and you need to first convert to an integer type (such as uint160), and then convert the integer value to the address type to get address payable:

Address addr1 = msg.sender;address payable addr2 = addr1; / / error, address cannot be implicitly converted to address payableaddress payable addr3 = address (uint160 (addr1)); / / correct, first converted to uint160, then converted to address payable3, address [] or address payable []

Although a single address payable variable can be converted to an address type, or vice versa, an entire array cannot be converted directly. For example:

Function testCast (address payable [] memory _ addresses) returns (address [] memory) {return _ addresses; / / error! } 4. Built-in variable types

In Solidity's built-in variables, the following variables are of type address payable:

Msg.sender

Tx.origin

Block.coinbase

You can use online Solidity IDE to test the Soldity code in this article to better understand the differences and conversions between address payable and address types in Soldity 0.5.

At this point, the study on "how to convert address into address payable" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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