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## Description
Closes: #10264
This PR makes 2 changes in the CLI:
### 1. Add an `--aux` flag to all tx command.
```bash
simd tx bank send <from> <to> <amount> --aux (optional: --tip <tipAmt> --tipper <tipper>)
```
This will print an AuxSignerData instead of broadcasting the tx.
### 2. Add a new `aux-to-fee` subcommand
```bash
simd tx aux-to-fee <aux_signer_data.json>
```
This takes the output of the previous command, and broadcasts a 2-signer tx.
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## Description
R4R
Closes: #9912
This PR introduces 1 new middleware:
- `TipsMiddleware`: transfer tip from tipper to feePayer when relevant.
It also makes sure in the DIRECT_AUX sign mode handler that the fee payer cannot use that sign mode.
Depends on:
- [x] #10028
- [x] #10268
- [x] #10322
- [x] #10346
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- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
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- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
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## Description
Closes: #10443
For creating an intermediary/auxiliary tx (e.g. by the tipper in tipped transactions), using the existing `client.TxBuilder` is awkward. We propose a new client-side builder for this purpose.
API Usage (e.g. how the tipper would programmtically use this):
```go
// Note: there's no need to use clientCtx.TxConfig anymore!
bldr := clienttx.NewAuxTxBuilder()
err := bldr.SetMsgs(msgs...)
bldr.SetAddress("cosmos1...")
bldr.SetMemo(...)
bldr.SetTip(...)
bldr.SetPubKey(...)
err := bldr.SetSignMode(...) // DIRECT_AUX or AMINO, or else error
// ... other setters are available
// Get the bytes to sign.
signBz, err := bldr.GetSignBytes()
// Sign the bz using your favorite method.
sig, err := privKey.sign(signBz)
// Set the signature
bldr.SetSig(sig)
// Get the final auxSignerData to be sent to the fee payer
auxSignerData, err:= bldr.GetAuxSignerData()
```
auxSignerData is a protobuf message, whose JSON reprensentation looks like:
```json
{
"address": "cosmos1...",
"mode": "SIGN_MODE_{DIRECT_AUX,LEGACY_AMINO_JSON}",
"sign_doc": {
"body_bytes": "{base64 bytes}",
"public_key": {
"@type": "cosmos.sepc256k1.PubKey",
"key": "{base64 bytes}"
},
"chain_id": "...",
"account_number": 24,
"sequence": 42,
"tip": {
"amount": [{ "denom": "uregen", "amount": 1000 }],
"tipper": "cosmos1..."
}
},
"sig": "{base64 bytes}"
}
```
Then the fee payer would use the TxBuilder to construct the final TX, with a new helper method: `AddAuxSignerData`:
```go
// get auxSignerData from AuxTxBuilder
auxSignerData := ...
txBuilder := txConfig.NewTxBuilder()
err := txBuilder.AddAuxSignerData(auxSignerData)
// Set fee payer data
txBuilder.SetFee()
txBuilder.SetGasLimit()
txBuilder.SetFeePayer()
sigs, err := txBuilder.GetSignaturesV2()
auxSig := sigs[0] // the aux signer's signature
// Set all signer infos (1st round of calling SetSignatures)
txBuilder.SetSignatures(
auxSig, // The aux SignatureV2
signing.SignatureV2{...}, // The feePayer's SignatureV2
)
// Sign
signBz, err = encCfg.TxConfig.SignModeHandler().GetSignBytes(...)
feepayerSig, err := feepayerPriv.Sign(signBz)
// Set all signatures (2nd round of calling SetSignatures)
txBuilder.SetSignatures(
auxSig, // The aux SignatureV2
signing.SignatureV2{feepayerSig, ...}, // The feePayer's SignatureV2
)
```
---
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- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
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- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
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- [ ] added a changelog entry to `CHANGELOG.md`
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## Description
Closes: #10249
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- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
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- [ ] added a changelog entry to `CHANGELOG.md`
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- [ ] confirmed all CI checks have passed
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atheeshp
Amaury
SaReN
Amaury Martiny
Alexander Bezobchuk
Aaron Craelius