Web3 dapp

Here is a typical flow of a web3 dapp with a visual representation:
  1. 1.
    User opens the dapp: The user opens the web3 dapp in their web browser.
  2. 2.
    Check for Web3 provider: The dapp checks if a web3 provider (such as Metamask) is installed on the user's computer. If not, the user is prompted to install it.
  3. 3.
    Connect to Ethereum network: The dapp connects to the Ethereum network through the web3 provider, allowing the user to interact with the blockchain.
  4. 4.
    Request user's account: The dapp requests the user's Ethereum account address from the web3 provider.
  5. 5.
    Display dapp interface: The dapp displays its interface, showing the user what actions they can perform.
  6. 6.
    User sends a transaction: The user selects an action and sends a transaction to the Ethereum network through the web3 provider.
  7. 7.
    Transaction is broadcast: The transaction is broadcast to the Ethereum network, where it is verified and processed by miners.
  8. 8.
    Transaction is confirmed: Once the transaction is confirmed by the network, the dapp updates the user's interface to reflect the result of the action.
  9. 9.
    Retrieve data from the blockchain: If necessary, the dapp retrieves data from the blockchain to display to the user.
  10. 10.
    User disconnects: The user disconnects from the dapp, ending their session on the Ethereum network.

Visual Representation

+--------------------------------------+
| |
| Web3 Dapp |
| |
+--------------------------------------+
|
|
|
|
+----------------------------+
| |
| Check for Web3 Provider |
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+----------------------------+
|
|
|
|
+---------------------------+
| |
| Connect to Network |
| |
+---------------------------+
|
|
|
|
+----------------------------+
| |
| Request User's |
| Ethereum Account |
| |
+----------------------------+
|
|
|
|
+------------------|------------------+
| | |
| | |
+-----------------+ +------------------+ +---------------------+
| | | | | |
| User selects an | | User sends a | | Dapp retrieves data |
| action | | transaction | | from the blockchain |
| | | | | |
+-----------------+ +------------------+ +---------------------+
| | |
| | |
| | |
+-----------------+ +------------------+ +---------------------+
| | | | | |
| Transaction | | Transaction is | | Display updated |
| is broadcasted | | confirmed | | interface and result |
| to the network | | | | of the action |
| | | | | |
+-----------------+ +------------------+ +---------------------+
|
|
|
|
+----------------------------+
| |
| User disconnects |
| |
+----------------------------+
​