Concept Flow - Batch operations
Start Batch
Add Operation 1
Add Operation 2
... Add more ops ...
Execute Batch
All ops processed
End Batch
Batch operations collect multiple actions and execute them together in one go, saving time and cost.
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Batch operations in Blockchain / Solidity - Step-by-Step Execution
Execution Sample
Blockchain / Solidity
batch = [] batch.append('transfer 10 tokens') batch.append('approve 5 tokens') execute_batch(batch)
This code collects two blockchain operations in a batch and executes them together.
Execution Table
| Step | Action | Batch Content | Execution Result |
|---|---|---|---|
| 1 | Start batch | [] | Batch initialized, empty list |
| 2 | Add 'transfer 10 tokens' | ['transfer 10 tokens'] | Operation added to batch |
| 3 | Add 'approve 5 tokens' | ['transfer 10 tokens', 'approve 5 tokens'] | Operation added to batch |
| 4 | Execute batch | ['transfer 10 tokens', 'approve 5 tokens'] | Both operations executed together |
| 5 | Batch cleared | [] | Batch emptied after execution |
💡 Batch executed and cleared to prepare for next batch
Variable Tracker
| Variable | Start | After Step 2 | After Step 3 | After Step 4 | Final |
|---|---|---|---|---|---|
| batch | [] | ['transfer 10 tokens'] | ['transfer 10 tokens', 'approve 5 tokens'] | [] | [] |
Key Moments - 2 Insights
Why do we clear the batch after execution?
After execution, the batch is cleared to avoid repeating the same operations again, as shown in step 5 of the execution_table.
Can we execute the batch before adding any operations?
No, executing an empty batch does nothing useful. The batch must have operations added first, as seen in steps 2 and 3.
Visual Quiz - 3 Questions
Test your understanding
Look at the execution_table, what is the batch content after step 3?
💡 Hint
Check the 'Batch Content' column at step 3 in the execution_table.
At which step does the batch get executed?
💡 Hint
Look for the 'Execute batch' action in the execution_table.
If we add a third operation before execution, how would the batch content look at step 4?
💡 Hint
Adding operations appends them to the batch list before execution, see steps 2 and 3.
Concept Snapshot
Batch operations collect multiple blockchain actions Add operations to a batch list Execute all operations together Saves time and transaction fees Clear batch after execution to avoid repeats
Full Transcript
Batch operations in blockchain let us group many actions and run them at once. We start with an empty batch list. Then we add operations like 'transfer tokens' or 'approve tokens' one by one. When ready, we execute the whole batch together. This saves time and cost because the blockchain processes all actions in one transaction. After execution, we clear the batch to prepare for new operations. Trying to execute an empty batch does nothing. The batch content changes as we add operations, and the execution runs all at once. This method is efficient and common in blockchain programming.