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docs: add genesis changes in upgrading.md (#17596)

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24
UPGRADING.md
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@ -53,7 +53,7 @@ Following an exhaustive list:
* Package `client/grpc/tmservice` -> `client/grpc/cmtservice`
Additionally, the commands and flags mentioning `tendermint` have been renamed to `comet`.
However, these commands and flags are still supported for backward compatibility.
These commands and flags are still supported for backward compatibility.
For backward compatibility, the `**/tendermint/**` gRPC services are still supported.
@ -61,6 +61,7 @@ Additionally, the SDK is starting its abstraction from CometBFT Go types thoroug
* The usage of the CometBFT logger has been replaced by the Cosmos SDK logger interface (`cosmossdk.io/log.Logger`).
* The usage of `github.com/cometbft/cometbft/libs/bytes.HexByte` has been replaced by `[]byte`.
* Usage of an application genesis (see [genutil](#xgenutil)).
#### Enable Vote Extensions
@ -101,7 +102,6 @@ allows an application to define handlers for these methods via `ExtendVoteHandle
and `VerifyVoteExtensionHandler` respectively. Please see [here](https://docs.cosmos.network/v0.50/building-apps/vote-extensions)
for more info.
#### Upgrade
**Users using `depinject` / app v2 do not need any changes, this is abstracted for them.**
@ -343,7 +343,25 @@ For ante handler construction via `ante.NewAnteHandler`, the field `ante.Handler
#### `x/capability`
Capability has been moved to [IBC-GO](https://github.com/cosmos/ibc-go). IBC v8 will contain the necessary changes to incorporate the new module location.
Capability has been moved to [IBC Go](https://github.com/cosmos/ibc-go). IBC v8 will contain the necessary changes to incorporate the new module location.
#### `x/genutil`
The Cosmos SDK has migrated from a CometBFT genesis to a application managed genesis file.
The genesis is now fully handled by `x/genutil`. This has no consequences for running chains:
* Importing a CometBFT genesis is still supported.
* Exporting a genesis now exports the genesis as an application genesis.
When needing to read an application genesis, use the following helpers from the `x/genutil/types` package:
```go
// AppGenesisFromReader reads the AppGenesis from the reader.
func AppGenesisFromReader(reader io.Reader) (*AppGenesis, error)
// AppGenesisFromFile reads the AppGenesis from the provided file.
func AppGenesisFromFile(genFile string) (*AppGenesis, error)
```
#### `x/gov`

22
x/genutil/README.md
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@ -2,16 +2,36 @@
## Concepts
The `genutil` package contains a variaety of genesis utility functionalities for usage within a blockchain application. Namely:
The `genutil` package contains a variety of genesis utility functionalities for usage within a blockchain application. Namely:
* Genesis transactions related (gentx)
* Commands for collection and creation of gentxs
* `InitChain` processing of gentxs
* Genesis file creation
* Genesis file validation
* Genesis file migration
* CometBFT related initialization
* Translation of an app genesis to a CometBFT genesis
## Genesis
Genutil contains the data structure that defines an application genesis.
An application genesis consist of a consensus genesis (g.e. CometBFT genesis) and application related genesis data.
```go reference
https://github.com/cosmos/cosmos-sdk/blob/v0.50.0-rc.0/x/genutil/types/genesis.go#L24-L34
```
The application genesis can then be translated to the consensus engine to the right format:
```go reference
https://github.com/cosmos/cosmos-sdk/blob/v0.50.0-rc.0/x/genutil/types/genesis.go#L126-L136
```
```go reference
https://github.com/cosmos/cosmos-sdk/blob/v0.50.0-rc.0/server/start.go#L397-L407
```
## Client
### CLI