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docs: correct explanation on how to set custom signer via depinject (#23654)

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Co-authored-by: John Letey <john@noble.xyz>
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Julien Robert 2025-02-12 01:06:24 +01:00 committed by GitHub
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22
docs/build/building-modules/02-messages-and-queries.md vendored
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@ -54,22 +54,32 @@ https://github.com/cosmos/cosmos-sdk/blob/v0.52.0-beta.2/x/bank/proto/cosmos/ban
If there is a need for custom signers then there is an alternative path which can be taken. A function which returns `signing.CustomGetSigner` for a specific message can be defined.
```go
func ProvideBankSendTransactionGetSigners() signing.CustomGetSigner {
func ProvideCustomMsgTransactionGetSigners() signing.CustomGetSigner {
// Extract the signer from the signature.
signer, err := coretypes.LatestSigner(Tx).Sender(ethTx)
if err != nil {
if err != nil {
return nil, err
}
// Return the signer in the required format.
return [][]byte{signer.Bytes()}, nil
return signing.CustomGetSigner{
MsgType: protoreflect.FullName(gogoproto.MessageName(&types.CustomMsg{})),
Fn: func(msg proto.Message) ([][]byte, error) {
return [][]byte{signer}, nil
}
}
}
```
This can be provided to the application using depinject's `Provide` method in the application's `app.go`:
This can be provided to the application using depinject's `Provide` method in the module that defines the type:
```go
depinject.Provide(banktypes.ProvideBankSendTransactionGetSigners)
```diff
func init() {
appconfig.RegisterModule(&modulev1.Module{},
- appconfig.Provide(ProvideModule),
+ appconfig.Provide(ProvideModule, ProvideCustomMsgTransactionGetSigners),
)
}
```
The Cosmos SDK uses Protobuf definitions to generate client and server code: