CountedNMap implementation

[Mr-Leshiy]

add CountedStorageNMap implementation which is similar as CountedStorageMap for StorageMap but for the StorageNMap
#10602

polkadot address: 16GBceb9xiWB1R5YQGRfEYDZbWcatmLz8MPd6KZYpy4qfV7B

[Mr-Leshiy]

@bkchr , @shawntabrizi don't want to be tactless, but can we proceed with this PR, it will be helpful to solve this issue paritytech/polkadot-sdk#316. Also after if this PR will be approved and merged I will prepare the same update for the StorageNMap.

[kianenigma]

This PR seems valuable, yet hat slipped through the crack. Partially due to lack of labeling and project assignment from our side. Hopefully will get some review soon. Thanks @Mr-Leshiy!

[jasl]

kindly ping

[juangirini]

bot fmt

[command-bot]

@juangirini https://gitlab.parity.io/parity/mirrors/substrate/-/jobs/3298354 was started for your command "$PIPELINE_SCRIPTS_DIR/commands/fmt/fmt.sh". Check out https://gitlab.parity.io/parity/mirrors/substrate/-/pipelines?page=1&scope=all&username=group_605_bot to know what else is being executed currently.

Comment bot cancel 4-d8960438-2c53-404a-965d-8c59ae22d0ed to cancel this command or bot cancel to cancel all commands in this pull request.

[command-bot]

@juangirini Command "$PIPELINE_SCRIPTS_DIR/commands/fmt/fmt.sh" has finished. Result: https://gitlab.parity.io/parity/mirrors/substrate/-/jobs/3298354 has finished. If any artifacts were generated, you can download them from https://gitlab.parity.io/parity/mirrors/substrate/-/jobs/3298354/artifacts/download.

[juangirini]

@Mr-Leshiy please note that there are some formatting issues that bot fmt is not able to solve. Could you please look into that?

[jasl]

@juangirini
Sorry for bothering you, but is this mergeable now?

[juangirini]

@sam0x17 @KiChjang There were some changes since your las reviews, would you give it another look before merging?

[jasl]

Could it be merged? this is really an awesome feature

[juangirini]

bot merge

[paritytech-processbot]

Error: Statuses failed for 4c29a0e

[juangirini]

bot rebase

[paritytech-processbot]

Rebased

[juangirini]

bot merge

[paritytech-processbot]

Waiting for commit status.

[kianenigma]

/tip medium

[substrate-tip-bot]

@Mr-Leshiy Contributor did not properly post their account address.

Make sure the pull request description (or user bio) has: "{network} address: {address}".

[kianenigma]

@Mr-Leshiy interested in a tip?

[Mr-Leshiy]

@kianenigma would be great :)
16GBceb9xiWB1R5YQGRfEYDZbWcatmLz8MPd6KZYpy4qfV7B

[juangirini]

/tip medium

[substrate-tip-bot]

@juangirini A medium (80 DOT) tip was successfully submitted for @Mr-Leshiy (16GBceb9xiWB1R5YQGRfEYDZbWcatmLz8MPd6KZYpy4qfV7B on polkadot).

https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frpc.polkadot.io#/referenda