It should be possible to see the amount of the auto-withdraw that happens on delegate and undelegate txs

[Onefox]

Summary of Bug

When bonding or unbonding coins the potential outstanding reward from the delegator gets auto-withdrawn to the delegator or the set reward address.
This auto-withdrawn is not shown in any form on the MsgDelegate or MsgUndelegate Tx.
This makes it very difficult to know how much was withdrawn while delegating or undelegating.

I would propose to add the same tag to the tx that is already in use when withdrawing rewards also to the MsgDelegate and MsgUndelegate txs.
Here an example of the tag:
https://hubble.figment.network/cosmos/chains/cosmoshub-2/blocks/1074949/transactions/CD89DBC2AA8FA8AB118CF7C1CF4A54D800E50341D3D2E16DD0B0076F1A8173DE?format=json
{"key":"rewards","value":"13618319uatom"}

Interestingly the following txs has non such tag:
https://hubble.figment.network/cosmos/chains/cosmoshub-2/blocks/470256/transactions/2A5B98E9077B28E9429A279825667F424BB49ED0BA0443996DA6B6022E7CDD50?format=json

I am not sure why could it be that the tx was just done before (#3850) was in place?

Version

Current mainnet.

Steps to Reproduce

1. Use a fresh account with some funds.
2. Stake to a validator X funds.
3. Wait until there are some rewards on the validator.
4. Stake some more funds.
5. Check your balance, It has gone down by the amount you staked and up by the reward you got.
6. There is no explanation for the reward amount on chain.

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For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned

[Onefox]

I think its fixed with the events added to 0.36.0 here:
https://github.com/cosmos/cosmos-sdk/pull/4541/files#diff-9d701528d2ee67dd081cf7ca4d484c05

[alexanderbez]

Yes, you'll be able to see all these events through the new events system 👍

[UdiIlan]

I see that the information isn't available in the events in version 0.36.
This is an example fir such tx:

{"height":"105","txhash":"D3DFF4AD99142529D9E4480239ACF2BBFDC36522353A8D677AF44E3DF62FBEA8","raw_log":"[{"msg_index":0,"success":true,"log":""}]","logs":[{"msg_index":0,"success":true,"log":""}],"gas_wanted":"200000","gas_used":"100447","events":[{"type":"delegate","attributes":[{"key":"validator","value":"cosmosvaloper1jp6wup6v8s6dqxdeq2epwt8u6pxpw3pf37hgru"},{"key":"amount","value":"100000"}]},{"type":"message","attributes":[{"key":"action","value":"delegate"},{"key":"sender","value":"cosmos1jv65s3grqf6v6jl3dp4t6c9t9rk99cd88lyufl"},{"key":"module","value":"staking"},{"key":"sender","value":"cosmos1y3qhvhmnd4cae5zfj9w48je3pfkckn0fm99g99"}]},{"type":"transfer","attributes":[{"key":"recipient","value":"cosmos1y3qhvhmnd4cae5zfj9w48je3pfkckn0fm99g99"}]}],"tx":{"type":"cosmos-sdk/StdTx","value":{"msg":[{"type":"cosmos-sdk/MsgDelegate","value":{"delegator_address":"cosmos1y3qhvhmnd4cae5zfj9w48je3pfkckn0fm99g99","validator_address":"cosmosvaloper1jp6wup6v8s6dqxdeq2epwt8u6pxpw3pf37hgru","amount":{"denom":"stake","amount":"100000"}}}],"fee":{"amount":[],"gas":"200000"},"signatures":[{"pub_key":{"type":"tendermint/PubKeySecp256k1","value":"AyKLozcl3YXspKx3hyorGJMnAGqoW9BBZB4m0OJZXr35"},"signature":"n5G+GFldmCPeqMPs68EadXscgztv+9ux2f+vNsoegx9Ce9GavcHUWRmCQNFX0ngb0cqwjLFagEHMWQo6echDeA=="}],"memo":""}},"timestamp":"2019-07-23T14:17:49Z"}

[alexanderbez]

@UdiIlan indeed! We are emitting the event, but just not the amount. I'll update this accordingly. Thank you!

[UdiIlan]

@alexanderbez do you think that the amount can be added any time soon?
Thanks!

[alexanderbez]

@UdiIlan yes, it'll be in the release coming out shortly.

ref: #4772