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docs: add ante precision #18709

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Dec 13, 2023
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docs: add ante precision #18709

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docs: add ante precision
julienrbrt Dec 12, 2023
6ab508e
updates
julienrbrt Dec 12, 2023
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4 changes: 4 additions & 0 deletions docs/learn/beginner/01-tx-lifecycle.md
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Expand Up @@ -112,6 +112,10 @@ A copy of the cached context is provided to the `AnteHandler`, which performs li

For example, the [`auth`](https://github.com/cosmos/cosmos-sdk/tree/main/x/auth) module `AnteHandler` checks and increments sequence numbers, checks signatures and account numbers, and deducts fees from the first signer of the transaction - all state changes are made using the `checkState`.

:::warning
Ante handlers only run on a transaction. If a transaction embed multiple messages (like some x/authz, x/gov transactions for instance), the ante handlers only have awareness of the outer message. Inner messages are mostly directly routed to the [message router](https://docs.cosmos.network/main/learn/advanced/baseapp#msg-service-router) and will skip the chain of ante handlers. Keep that in mind when designing your own ante handler.
:::

### Gas

The [`Context`](../advanced/02-context.md), which keeps a `GasMeter` that tracks how much gas is used during the execution of `Tx`, is initialized. The user-provided amount of gas for `Tx` is known as `GasWanted`. If `GasConsumed`, the amount of gas consumed during execution, ever exceeds `GasWanted`, the execution stops and the changes made to the cached copy of the state are not committed. Otherwise, `CheckTx` sets `GasUsed` equal to `GasConsumed` and returns it in the result. After calculating the gas and fee values, validator-nodes check that the user-specified `gas-prices` is greater than their locally defined `min-gas-prices`.
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2 changes: 1 addition & 1 deletion x/circuit/README.md
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Expand Up @@ -23,7 +23,7 @@ https://github.com/cosmos/cosmos-sdk/blob/v0.50.1/baseapp/msg_service_router.go#
```

:::note
The `CircuitBreakerDecorator` works for most use cases, but does not check the inner messages of a transaction. This some transactions (such as `x/authz` transactions or some `x/gov` transactions) may pass the ante handler. **This does not affect the circuit breaker** as the message router check will still fail the transaction.
The `CircuitBreakerDecorator` works for most use cases, but [does not check the inner messages of a transaction](https://docs.cosmos.network/main/learn/beginner/tx-lifecycle#antehandler). This some transactions (such as `x/authz` transactions or some `x/gov` transactions) may pass the ante handler. **This does not affect the circuit breaker** as the message router check will still fail the transaction.
This tradeoff is to avoid introducing more dependencies in the `x/circuit` module. Chains can re-define the `CircuitBreakerDecorator` to check for inner messages if they wish to do so.
:::

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