A simple contract can be deployed using geth and interacted with using Web3 via the command-line interface that geth provides (console or attach).
As an example, the following source code will be used: pragma solidity ^0.4.0; contract valueChecker uint price=10; event valueEvent(bool returnValue); function Matcher (uint8 x) public returns (bool) if (x>=price) valueEvent(true); return true; 1.
A Complete Guide to Understanding This Blockchain Concept
Run geth client using the following command: $ ./geth –datadir ~/etherprivate/ –networkid 786 –rpc -rpcapi ‘web3,eth,debug,personal’ –rpccorsdomain ‘*’ 2.
You will also want to open another terminal and run the following command.
The geth console should already be running by using the following command; if not run it using the following command: $ ./geth attach ipc:/Users/drequinox/etherprivate/geth.ipc 3.
To learn how to download and use the Remix browser, refer to , Development Tools and Frameworks.
Now copy the Web3 deployment script by clicking on the Details button and copy the function into the clipboard.
This can be achieved by clicking on the icon next to WEB3DEPLOY caption in the IDE.
Why This Matters for Blockchain Technology
First, paste the following source code in the Remix IDE. the Remix IDE in more detail later ; for now, we are using this IDE only to get the required Web3 deployment object for deployment: pragma solidity ^0.4.0; contract valueChecker uint price=10; event valueEvent(bool returnValue); function Matcher (uint8 x) public returns (bool) if (x>=price) valueEvent(true); return true; Once the code is pasted in the Remix IDE, it will look like this: Code shown in Remix 4. Now copy the Web3 deployment script by clicking on the Details button and copy the function into the clipboard. This can be achieved by clicking on the icon next to WEB3DEPLOY caption in the IDE. The Web3 deploy script is shown in the following screenshot:
Key Points to Remember
- Contract deployment A simple contract can be deployed using geth and interacted with using Web3 via the command-line interface that geth provides (console or attach).
- As an example, the following source code will be used: pragma solidity ^0.4.0; contract valueChecker uint price=10; event valueEvent(bool returnValue); function Matcher (uint8 x) public returns (bool) if (x>=price) valueEvent(true); return true; 1.
- Run geth client using the following command: $ ./geth –datadir ~/etherprivate/ –networkid 786 –rpc -rpcapi ‘web3,eth,debug,personal’ –rpccorsdomain ‘*’ 2.
- You will also want to open another terminal and run the following command.
Conclusion
Contract deployment represents one of the many innovative layers that make blockchain technology so powerful and transformative. As distributed systems continue to evolve, a solid understanding of these core concepts becomes increasingly valuable — not just for developers, but for anyone building, investing in, or working alongside blockchain-powered systems.
Whether you are just starting your blockchain journey or deepening existing expertise, mastering these fundamentals gives you the tools to think clearly about decentralized systems and make smarter decisions in this rapidly evolving space.