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add intuitin about checktx -> delivertx validity

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This commit is contained in:
William Banfield
2022-01-06 18:40:42 -05:00
parent 3854f3b69c
commit bf147c2ea5
1 changed files with 5 additions and 3 deletions
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8
docs/tutorials/go-built-in.md
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@@ -291,9 +291,12 @@ func (app *KVStoreApplication) DeliverTx(req abcitypes.RequestDeliverTx) abcityp
```
Note that we check the validity of the transaction _again_ during `DeliverTx`.
Transactions are not guaranteed to be valid when they are delivered to an
application.
application. This can happen if the application state is used to determine transaction
validity. Application state may have changed between when the `CheckTx` was initially
called and when the transaction was delivered in `DeliverTx` in a way that rendered
the transaction no longer valid.
Also note that we don't commit the Badger `Txn` we are building during `DeliverTx`.
Also note that we don't commit the Badger `Txn` we are building during `DeliverTx`.
Other methods, such as `Query`, rely on a consistent view of the application's state.
The application should only update its state when the full block has been delivered.
@@ -309,7 +312,6 @@ func (app *KVStoreApplication) Commit() abcitypes.ResponseCommit {
}
```
### 1.3.3 Query Method
We'll want to be able to determine if a transaction was committed to the state-machine.