Solidity Bootcamp 24Q1

Group 1 - homework 1

HelloWorld Contract: 0xC0b3e125431BA3710703E8019f0C5ab2116a2954

State

This project traces HelloWorld Contact that holds state of owner and text.

Functions

Only Owner can set text, and also transfer ownership.

Anyone can execute helloworld() function which displays the text.

Below describes whole sequence of 4 wallets who start with 1 owner and demo-ing how only owner can set text and also transfer ownership and how each owner sets Text and then transfers ownership to next owner. Anyone can view the text.

First Owner - `0xB1c4bB25346ad3F3de0019AE75eEa1ADAce201e8`

below is the contract deployed by address - 0xB1c4bB25346ad3F3de0019AE75eEa1ADAce201e8

https://sepolia.etherscan.io/address/0xC0b3e125431BA3710703E8019f0C5ab2116a2954

caller: 0xB1c4bB25346ad3F3de0019AE75eEa1ADAce201e8 (Joezari's wallet address)
- Transaction Hash: 0xb82b43d0a86f23c5c946a41d9afd8b0e7b367440f3bf1ba36c78b97e1b2ef19e
  - Creation of contract (0xC0b3e125431BA3710703E8019f0C5ab2116a2954)
  - Success
- Transaction Hash: 0x9b3bc17a8fccd0a94fdd1d7e86205226daac38f0429b2bd1137f4aa49c63aee3
  - called setText()
  - Success: because I am the current owner
next before transfer of ownership wallet 0xd8F68a7AeB7df4c349274e84B493451D6D3518b6 (chuck) tried to set Text and also try transfer ownership and both fail. Below are the 2 Txns on Etherscan

2nd owner - `0xd8F68a7AeB7df4c349274e84B493451D6D3518b6`

Transaction hash: 0xbfc4d93551467ec0d8ada1497c71b5235246a30f18fbd22f6af2976361662d14
- Transfer of ownership to wallet 0xd8F68a7AeB7df4c349274e84B493451D6D3518b6
- Success: transferred to a valid address (0xC0b3e125431BA3710703E8019f0C5ab2116a2954 - Chuck's)

1st former owner tries to set Text but fails since no longer owner

Transaction Hash: 0xf2e0d0370f4c8b1371330d498f14297365c999ef9f9e88e0796abbd05608cd9b
- called setText()
- Failed: because I am no longer the owner, setText() has a modifier that checks if the caller of the function is the owner of the contract
- Error: Fail with error 'Caller is not the owner'