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feat: Cancel unbonding delegation entry (cosmos#10885)
## Description Closes: cosmos#577 This pull request contains `Canceling unbonding delegation entry` and `delegate back to previous validator` ### `Msg` Service ```protobuf= package cosmos.staking.v1beta1; service Msg { // CancelUnbondingDelegation rpc CancelUnbondingDelegation(MsgCancelUnbondingDelegation) returns (MsgCancelUnbondingDelegationResponse); } // MsgCancelUnbondingDelegation message MsgCancelUnbondingDelegation { option (gogoproto.equal) = false; option (gogoproto.goproto_getters) = false; string delegator_address = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"]; string validator_address = 2 [(cosmos_proto.scalar) = "cosmos.AddressString"]; cosmos.base.v1beta1.Coin amount = 3 [(gogoproto.nullable) = false]; // creation_height is the height which the unbonding took place. int64 creation_height = 4; } // MsgCancelUnbondingDelegationResponse message MsgCancelUnbondingDelegationResponse{ } ``` ### `Msg` Method Implementation ```go= func (k msgServer) CancelUnbondingDelegation(goCtx context.Context, msg *types.MsgCancelUnbondingDelegation) (*types.MsgCancelUnbondingDelegationResponse, error) { /* // checking the unbonding delegation at creation_height // get the unbonding delegations of delegatorAddress if ubdEntry balance is equal to msg.Amount remove the entry from ubd else update the specific entry with new balance if len(ubd.Entries) == 0 { k.RemoveUnbondingDelegation(ctx, ubd) } else { k.SetUnbondingDelegation(ctx, ubd) } */ // update the delegation back to validator // get validator validator, found := k.GetValidator(ctx, valAddr) if !found { return nil, types.ErrNoValidatorFound } // delegate the unbonding amount to validator back _, err = k.Keeper.Delegate(ctx, delegatorAddress, msg.Amount.Amount, types.Unbonding, validator, false) if err != nil { return nil, err } _, err := ms.Keeper.CancelUnbondingDelegation(ctx,delegatorAddress,validatorAddress,amount,creation_height) if err != nil { return nil, err } return &types.MsgCancelUnbondingDelegationResponse{}, nil } ``` #### `cli tx` Method ```bash= simd tx staking cancel-unbond [validator-address] [amount] [creation_height] --from [user] --chain-id [chain-id] Example: simd tx staking cancel-unbond cosmosvaloper1mqtyv4qux68r26mql2hjhgrvz72snjwpulq22m 100000stake 10280 --from test1 --chain-id test-chain ``` --- ### 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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