Ethereum smart contracts interaction tutorial: Direct operation method without relying on DAPP

This article will introduce how to directly interact with Ethereum smart contracts using only the Etherscan block explorer, without relying on any DAPP applications. This method is not only safe and reliable, but also allows you to better understand the operational mechanisms of smart contracts.

Preparation Work

Before we begin, please make sure you have the following tools ready:

1. Network proxy software
2. MetaMask wallet plugin

Operation Steps

1. Ensure the network connection is normal.

First, start your network proxy software. When you can smoothly access Google search, it indicates that the network connection is ready.

2. Access the target smart contract

Open the Etherscan block explorer and find the smart contract address you want to interact with. This tutorial takes the NEST 3.0 version of the QP Token deposit contract as an example to demonstrate how to perform the QP Token retrieval operation.

3. Connect Web3 wallet

On the contract page, click "Contracts", then "Write Contract", and select the "Connect to Web3" option. In the pop-up window, choose and connect your MetaMask wallet extension.

4. Target positioning method

Scroll down on the contract page to find the method you need to call. In this example, we will use the "takeOut" method to retrieve QP Token.

5. Execute contract interaction

After finding the "takeOut" method, you need to fill in the following information:

• First input box: Enter the amount of QP Token you want to withdraw. Note that you need to add 18 zeros after the amount. For example, to withdraw 100 tokens, you should enter: 100000000000000000000.
• Second input box: Enter the contract address of the token corresponding to the QP Token you want to withdraw.

After filling out, click the "Write" button to initiate the transaction. You can check the transaction packaging progress through the "View your transaction" link.

Notes

1. When entering the number of Tokens, please make sure there are 18 zeros after the decimal point. For example, to withdraw 10,000 Tokens, you should input: 10000000000000000000000.

2. The contract addresses for different tokens are different, please ensure you enter the correct contract address. Below are some common token contract addresses for your reference:

   • NEST Token: 0x04abeda201850ac0124161f037efd70c74ddc74c
   • NYFI: 0x075190c6130ea0a3a7e40802f1d77f4ea8f38fe2
   • NHBTC: 0x1f832091faf289ed4f50fe7418cfbd2611225d46

3. After initiating the transaction, please be patient and wait for the transaction to be confirmed. The confirmation time may vary depending on the level of network congestion.

By this method, you can interact directly with smart contracts on Etherscan without using any third-party DAPPs or importing your wallet into unfamiliar software. This not only enhances the security of the operation but also gives you a more intuitive understanding of how smart contracts work.