Yashotantra Academy logo
← Vyper theorytheory 0/50 · 0%
level 1
Curious · 0 XP
streak
0d
perfect
0
badges
0

100 XP to Apprentice

Web3 integration · hard

49. Interacting with Vyper contracts from a dApp

Connecting a front end to a deployed contract.

1 min read3 questionsup to 50 XPtopic 49/50

Read in another language

AI translates the explanation and quiz text while preserving code and answer scoring.

A front end needs the deployed address and ABI to build a contract instance, then calls read (`view`) functions freely and prompts the user's wallet to sign write (state-changing) transactions.

import { createPublicClient, http, getContract } from "viem";

const contract = getContract({
  address: "0xYourContract",
  abi: vyperAbi,
  client: publicClient,
});

const rate = await contract.read.rate();

Writes go through the user's wallet (e.g. MetaMask) so they can review gas cost and the exact calldata before signing — the dApp never has custody of the user's private key.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

  • · Up to 30 XP from quiz accuracy.
  • · +15 XP for a perfect first attempt.
  • · +5 XP while a 3-day streak is running.
  • · 75% or higher marks the topic complete.

Check your understanding

  1. 1. What two things does a front end need to interact with a deployed contract?

  2. 2. Who signs a state-changing (write) transaction?

  3. 3. Can view/read calls be made without a wallet signature?

Badges

First light
Pass your first topic
Sharp shooter
3 perfect first-try quizzes
On a roll
Study 3 days in a row
Week warrior
Study 7 days in a row
Grinder
Earn 500 XP
Deep diver
Earn 1500 XP