Upgrade Step-by-step

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The Testnet upgrade aims to provide a platform for validators to have rehearsal on upgrading the chain from SheungWan to FoTan.
Overview 
Preparation
Set up a Testnet chain running SheungWan software (to mimic the current state of SheungWan Mainnet).
Pre-upgrade
Make sure you have all keys 
operator key in .likecli folder, or in mnemonic format,
node key in .liked/config/node_key.json
consensus key in .liked/config/priv_validator_key.json
backed up properly, in case anything disastrous happens.
Pass the proposal, determining the date, time, software version and parameters of the upgrade
Change the node config, so it will automatically halt at the determined upgrade time
During upgrade
Run a web conference with other validators
Need to discuss export height and genesis time in realtime
Export keys and files
Export node key and consensus key by copying the key files
Export address book by copying the key files
Create new genesis
Determine export height
Determine new chain genesis time
Export old chain state
Migrate old chain state to new chain genesis
Verify new chain state
Setup new chain node
Initialize new chain node
Import new chain state
Import operator key
Import node key and consensus key
Import address book
Migrate operator key
Start the node and wait for what would happen at the new chain genesis time
Setup Testnet with SheungWan software
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Part I - Setup Testnet with SheungWan software
Requirements
Requirements
A server/ computer which will always be online.
May get one from Google Cloud Compute Engine free tier, though the networking may have some cost.
Or use a free trial quota from cloud providers
At least 40 GB of disk space
SSD preferred
Install Git​
Install Docker and Docker Compose, Docker Compose needs to have version ≥ 1.28
Parameters
Chain ID: likecoin-chain-public-testnet-2
Genesis file: https://gist.githubusercontent.com/nnkken/a4eff0359b1acd816aa536bd664eb7ed/raw/207206a952078184b7dea1f152d4068612ef7bd6/genesis.json​
SHA256: 313f93afce5438655239f8f6915af02fd500a7485c6e0a2a0fb8ae8b6ed1decb
Seed node: [email protected]:31801
Software:
before upgrade: https://github.com/likecoin/likecoin-chain/tree/sheungwan-2​
commit: f81b7c728c0cdf22db4c324d8a12003c99b09703
after upgrade: https://github.com/likecoin/likecoin-chain/tree/fotan-1​
commit: 32056fc4759d276a11180256474cc4ed5e3ed8d4
Faucet: https://likecoin-public-testnet-faucet.nnkken.dev​
Explorer: https://likecoin-chain-public-testnet-2.netlify.app/​
Denom (unit of token): nanoekil (ekil is reverse of like)
Setup procedure
1.
Install Git, Docker and Docker Compose​
2.
Clone the deployment repo with the corresponding branch:
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git clone https://github.com/likecoin/likecoin-chain --branch sheungwan-2
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3.
Go into the cloned repo:
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cd likecoin-chain
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4.
Copy the template docker-compose.yml.template and .env.template as docker-compose.yml and .env respectively:
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cp docker-compose.yml.template docker-compose.yml
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cp .env.template .env
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5.
Edit .env file to fill in the details, including chain parameters and custom parameters:
LIKECOIN_DOCKER_IMAGE: "likecoin/likecoin-chain:sheungwan-2-testnet"
LIKECOIN_CHAIN_ID: "likecoin-chain-public-testnet-2"
LIKECOIN_UID: normally keep it as "1000" is fine, but if you are using root user under Linux (e.g. in some VPS) then you should change it to "0".
LIKECOIN_MONIKER: any name you want to call your node. Will be displayed on validator list as the name of the validator.
LIKECOIN_GENESIS_URL: "https://gist.githubusercontent.com/nnkken/a4eff0359b1acd816aa536bd664eb7ed/raw/207206a952078184b7dea1f152d4068612ef7bd6/genesis.json"
LIKECOIN_SEED_NODES: "[email protected]:31801"
6.
Initialize the node:
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docker-compose run --rm init
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This will create .liked and .likecli folders, setup the node config files and download genesis file according to the parameters in .env.
Note that building the Docker image is not necessary, as the image is already on Docker Hub and Docker Compose will download the image automatically.

7.
Setup the keystore and the operator key:
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docker-compose run --rm likecli-command keys add validator
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Follow the instruction to setup the keystore with passphrase. Eventually the command will output the address and a set of mnemonic words. Please write down the mnemonic words for backup.

8.
Start the node
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docker-compose up -d
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9.
Check the logs:
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docker-compose logs --tail 100 -f
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You should see the node synchronizing the blocks from the network. You may stop the display of the logs by Ctrl+C at anytime, it won't stop the node operation.

10.
Wait until the node is synchronized. This may take some time (hours), depending on the current block height of the chain.
You may check by going to http://localhost:26657/status and check result.sync_info.catching_up. If the value is false, that means the node has caught up the latest block of the network.

11.
Run the following command to check the operator address:
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docker-compose run --rm likecli-command keys show validator --address
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12.
Get some token from the faucet at https://likecoin-public-testnet-faucet.nnkken.dev. Fill in the operator address for receiving the token.

13.
You may check the balance by:
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docker-compose run --rm likecli-command \
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query account \
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--chain-id likecoin-chain-public-testnet-2 \
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--node tcp://liked-service:26657 \
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<OPERATOR_ADDRESS>
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Here modify <OPERATOR_ADDRESS> to the operator address you get from the previous step.

14.
Sign and send a transaction for creating a validator:
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docker-compose run --rm create-validator \
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--amount <AMOUNT> \
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--details <DETAILS> \
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--commission-rate <COMMISSION_RATE>
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Modify the parameters:
<AMOUNT>: the amount to self-delegate on the validator at the beginning (e.g. 90000000000000nanoekil).
<DETAILS>: the detailed description of the validator. Remember to quote it using ".:
<COMMISSION_RATE>: the validator's commission rate, which could be seen as the "tax" received by the validator from delegators, e.g. 0.5 (50%).
Optionally, you may add the following additional parameters:
--identity <IDENTITY>: a string representing the identity of the validator, usually the GPG fingerprint. Some block explorers (e.g. Big Dipper) will query this field and search Keybase for the user profile.
--website <WEBSITE>: the website of the validator.

15.
You should be able to query the validator by:
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docker-compose run --rm likecli-command \
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query staking validators \
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--chain-id likecoin-chain-public-testnet-2 \
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--node tcp://liked-service:26657
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Note that the operator address referring the validator will start by cosmosvaloper1 instead of cosmos1, and the last few letters (checksum characters) are also different.
Pre-upgrade: proposal & preparation
​​ 🧙♂
 Part II - Pre-upgrade: proposal & preparation
Pre-upgrade
1.
Raise and pass a proposal on the upgrade.
To raise a proposal, one of the validators run the following command:
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docker-compose run --rm likecli-command \
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tx gov submit-proposal \
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--chain-id likecoin-chain-public-testnet-2 \
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--node tcp://liked-service:26657 \
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--from validator \
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--title "Upgrade software version to fotan-1" \
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--type text \
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--deposit 10000000000000nanoekil \
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--description <DESCRIPTION>
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Modify the parameters:
<DESCRIPTION>: the content of the proposal, which should include some introduction to the upgrade, and also the following contents:
the halt time (in both human-readable format with timezone, and also Unix timestamp)
the new chain parameters for the new ISCN module, namely:
ISCN registry name
ISCN fee per byte
the new software version (in Git commit hash)
and the new chain ID (e.g. likecoin-chain-public-testnet-3)

2.
After the creation of the proposal, one may query the content of the proposal by:
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docker-compose run --rm likecli-command \
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query gov proposals \
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--chain-id likecoin-chain-public-testnet-2 \
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--node tcp://liked-service:26657
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This will also show the proposal ID (should be 1 for the first proposal).

3.
To pass the proposal, all validators vote for the proposal by running:
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docker-compose run --rm vote 1 yes
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Which means vote "yes" in proposal ID 1.

4.
After the proposal is passed, setup chain halt time by modifying .env file and changing LIKECOIN_HALT_TIME to the Unix timestamp of the halt time in the proposal.

5.
Restart the chain node by running:
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docker-compose up -d
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6.
Jot down the content of the proposal, since chain explorers and APIs may not work during upgrade.
During upgrade
​🧙♂
 Part III - During the upgrade
1.
Right before the upgrade, validators should jot down the content of the proposal, since chain explorers and APIs may not work during the upgrade.
2.
Validators should hold a meeting right before the upgrade time for discussing issues during the upgrade.
3.
When the upgrade time comes, the chain node should be halt automatically.
4.
Go into the node folder:
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cd likecoin-chain
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5.
Turn down the node:
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docker-compose stop
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6.
Check the consensus public key:
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docker-compose run --rm liked-command tendermint show-validator
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Record the output as consensus public key for later verification

7.
Check the node ID:
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docker-compose run --rm liked-command tendermint show-node-id
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Record the output as node ID for later verification

8.
Check the halting height of the node by:
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docker-compose run --rm liked-command show-height
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9.
Confirm with other validators for the minimum height of exporting the state. The principle is to have consent and prevent state lost. For example, if the heights are 1234, 1234, 1234, 1233, 1233 for different validators, then validators may use 1233 as the height for exporting state.

10.
Export chain state:
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docker-compose run --rm liked-command \
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export --for-zero-height \
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--height <HEIGHT> \
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> exported.json
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Where the <HEIGHT> is the height confirmed with other validators in the previous step.

11.
Copy node_key.json (node key), priv_validator_key.json (consensus key) and addrbook.json (address book) from .liked/config into the fotan node folder:
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mkdir keys
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cp .liked/config/node_key.json \
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.liked/config/priv_validator_key.json \
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.liked/config/addrbook.json \
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keys
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This is to preserve the same keys and address book for the new fotan node.

12.
Discuss with others the new genesis time, should have consensus according to the progress of the majority.

13.
Fetch the newest software branch for the upgrade:
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git fetch
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14.
Checkout to the new software:
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git checkout fotan-1
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15.
Use new template of docker-compose.yml from the new software:
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cp docker-compose.yml docker-compose.yml.old
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cp docker-compose.yml.template docker-compose.yml
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16.
Modify .env for the new chain:
LIKECOIN_DOCKER_IMAGE: likecoin/likecoin-chain:fotan-1-testnet
LIKECOIN_CHAIN_ID: the new chain ID specified in the proposal.
LIKECOIN_HALT_TIME: "0" so that the new chain node can start up.
LIKECOIN_GENESIS_URL: "genesis.json". The init script will detect that it is a local file and copy it from the migrated genesis file generated in the next step.

17.
Migrate genesis state:
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docker-compose run --rm liked-command \
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migrate /host/exported.json \
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--log_level "error" \
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--chain-id <NEW_CHAIN_ID> \
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--iscn-registry-name <ISCN_REGISTRY_NAME> \
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--iscn-fee-per-byte <ISCN_FEE_PER_BYTE> \
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--genesis-time <GENESIS_TIME> \
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--output /host/genesis.json
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Where <NEW_CHAIN_ID>, <ISCN_REGISTRY_NAME> and <ISCN_FEE_PER_BYTE> should be modified to the values specified in the upgrade proposal, and <GENESIS_TIME> is determined in the previous step (format: YYYY-MM-DDThh:mm:ssZ, in UTC).

18.
Archive the old .liked folder:
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mv .liked .liked-old
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19.
Compute the checksum of genesis state with others:
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sha256sum genesis.json
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For Mac, use the following command instead:
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shasum -a 256 genesis.json
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Verify the output checksum with other validators.

20.
Re-initialize the node:
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docker-compose run --rm init
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Note that this will create and write a new consensus public key at the end of .env file, which won't be used since we will use the original key instead. If you are already a validator, you will probably never use the field again so this is fine, but you are free to delete this line.

21.
(optional) Configure the new node (config.toml & app.toml, both are in .liked/config)
in app.toml:
setup minimum-gas-prices if needed, see the setting in your sheungwan node config
under [api] section, if you need a local RESTful API server, then set enable to true, and also setup the corresponding port mapping in docker-compose.yml
in config.toml:
under [p2p] section, if you don't want to use the --get-ip option in the command parameter when starting the node for retrieving your externally accessible IP from third parties, then you need to enter your external address and port in external_address (e.g. 123.123.123.123:26656)

22.
Migrate the operator key:
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docker-compose run liked-command keys migrate /host/.likecli
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Follow the instructions to migrate the keys in the old keystore.
For passphrases, the first one is for decrypting the old keystore, and the following 2 are for creating the new keystore.
Note that when it asks Skip key migration? [y/N]:, N actually means not skipping, which is what we need.

23.
Verify the operator key is properly imported:
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docker-compose run --rm liked-command keys list
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Check if the key with operator's address is listed and is the same address as before.

24.
Re-import node key, consensus key and address book:
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cp keys/node_key.json \
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keys/priv_validator_key.json \
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keys/addrbook.json \
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.liked/config
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25.
Verify the consensus key has been properly imported:
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docker-compose run --rm liked-command \
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tendermint show-validator
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Verify that the output is the same as the previous recorded consensus public key.

26.
Verify the node key has been properly imported:
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docker-compose run --rm liked-command \
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tendermint show-node-id
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Verify that the output is the same as the previous recorded node ID.

27.
Restart the node:
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docker-compose up -d
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28.
Monitor the logs:
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docker-compose logs -f
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29.
Wait for the new genesis time to see if anything goes wrong.
30.
Properly process the .liked-old, .likecli and keys folders, so the credentials are not leaked.
When Upgrade failed
​🧙♂
 Part IV - When Upgrade failed
If fatal issues happened during the upgrade (e.g. serious software bugs), then with the consent from the majority of the validators, validators may give up the upgrade and restart the SheungWan chain.
The procedure is simple:
1.
Revert changes to docker-compose.yml and .env.
2.
Set halt-time to "0" in .env.
3.
Revert .liked folder from .liked-bak.
4.
Start the node by docker-compose up -d.
5.
Wait for enough validators to get online.
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