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fix(baseapp/docs): create new section
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--- | ||
sidebar_position: 1 | ||
--- | ||
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### Modifying the `DefaultGenesis` | ||
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It is possible to modify the DefaultGenesis parameters for modules by wrapping the module, providing it to the `*module.Manager` and injecting it with `depinject`. | ||
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Example ( staking ) : | ||
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```go | ||
type CustomStakingModule struct { | ||
staking.AppModule | ||
cdc codec.Codec | ||
} | ||
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// DefaultGenesis will override the Staking module DefaultGenesis AppModuleBasic method. | ||
func (cm CustomStakingModule) DefaultGenesis() json.RawMessage { | ||
params := stakingtypes.DefaultParams() | ||
params.BondDenom = "mydenom" | ||
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return cm.cdc.MustMarshalJSON(&stakingtypes.GenesisState{ | ||
Params: params, | ||
}) | ||
} | ||
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// option 1: use new module manager | ||
moduleManager := module.NewManagerFromMap(map[string]appmodule.AppModule{ | ||
stakingtypes.ModuleName: CustomStakingModule{cdc: appCodec, AppModule: staking.NewAppModule(...)}, | ||
// other modules ... | ||
}) | ||
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// option 2: override previous module manager | ||
oldStakingModule,_ := moduleManager.Modules()[stakingtypes.ModuleName].(staking.AppModule) | ||
moduleManager.Modules()[stakingtypes.ModuleName] = CustomStakingModule{ | ||
AppModule: oldStakingModule, | ||
cdc: appCodec, | ||
} | ||
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// depinject users | ||
depinject.Inject( | ||
// ... | ||
&moduleManager, | ||
) | ||
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// non-depinject users | ||
moduleManager.RegisterLegacyAminoCodec(legacyAmino) | ||
moduleManager.RegisterInterfaces(interfaceRegistry) | ||
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``` | ||
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