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<!-- The default pull request template is for types feat, fix, or refactor. For other templates, add one of the following parameters to the url: - template=docs.md - template=other.md --> ## 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 ) ``` --- ### Author Checklist *All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow up issues.* I have... - [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] added `!` to the type prefix if API or client breaking change - [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting)) - [ ] provided a link to the relevant issue or specification - [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules) - [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing) - [ ] added a changelog entry to `CHANGELOG.md` - [ ] included comments for [documenting Go code](https://blog.golang.org/godoc) - [ ] updated the relevant documentation or specification - [ ] reviewed "Files changed" and left comments if necessary - [ ] confirmed all CI checks have passed ### Reviewers Checklist *All items are required. Please add a note if the item is not applicable and please add your handle next to the items reviewed if you only reviewed selected items.* I have... - [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] confirmed `!` in the type prefix if API or client breaking change - [ ] confirmed all author checklist items have been addressed - [ ] reviewed state machine logic - [ ] reviewed API design and naming - [ ] reviewed documentation is accurate - [ ] reviewed tests and test coverage - [ ] manually tested (if applicable) |
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README.md
Cosmos SDK
The Cosmos SDK is a framework for building blockchain applications. Tendermint Core (BFT Consensus) and the Cosmos SDK are written in the Golang programming language. Cosmos SDK is used to build Gaia, the first implementation of the Cosmos Hub.
WARNING: The Cosmos SDK has mostly stabilized, but we are still making some breaking changes.
Note: Requires Go 1.17+
Quick Start
To learn how the Cosmos SDK works from a high-level perspective, see the Cosmos SDK High-Level Intro.
If you want to get started quickly and learn how to build on top of Cosmos SDK, visit Cosmos SDK Tutorials. You can also fork the tutorial's repository to get started building your own Cosmos SDK application.
For more information, see the Cosmos SDK Documentation.
Contributing
See CONTRIBUTING.md for details how to contribute and participate in our dev calls. If you want to follow the updates or learn more about the latest design then join our Discord.
Tools and Frameworks
The Cosmos ecosystem is vast. We will only make a few notable mentions here.
- Tools: notable frameworks and modules.
- CosmJS: the Swiss Army knife to power JavaScript based client solutions.
Cosmos Hub Mainnet
The Cosmos Hub application, gaia, has moved to its own cosmos/gaia repository. Go there to join the Cosmos Hub mainnet and more.
Inter-Blockchain Communication (IBC)
The IBC module for the Cosmos SDK has moved to its own cosmos/ibc-go repository. Go there to build and integrate with the IBC module.
Starport
Starport is the all-in-one platform to build, launch, and maintain any crypto application on a sovereign and secured blockchain. If you are building a new app or a new module, use Starport to get started and speed up development.
Disambiguation
This Cosmos SDK project is not related to the React-Cosmos project (yet). Many thanks to Evan Coury and Ovidiu (@skidding) for this Github organization name. As per our agreement, this disambiguation notice will stay here.