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Run a Snapshot squid

This is a quest to run a squid migrated from the Snapshot subgraph by @0xNomind, one of the winners of the migration quest. You can find the original repository here.

Note: you'll need to have at least 10 tSQD to complete this quest. Obtain them by doing other quests first.

I. Install dependencies: Node.js, Docker, Git.

On Windows

Enable Hyper-V.
Install Docker for Windows.
Install NodeJS LTS using the official installer.
Install Git for Windows.

In all installs it is OK to leave all the options at their default values. You will need a terminal to complete this tutorial - WSL bash is the preferred option.

On Mac

Install Docker for Mac.
Install Git using the installer or by other means.
Install NodeJS LTS using the official installer.

We recommend configuring NodeJS to install global packages to a folder owned by an unprivileged account. Create the folder by running

mkdir ~/global-node-packages

then configure NodeJS to use it

npm config set prefix ~/global-node-packages

Make sure that the folder ~/global-node-packages/bin is in PATH. That allows running globally installed NodeJS executables from any terminal. Here is a one-liner that detects your shell and takes care of setting PATH:

CURSHELL=`ps -hp $$ | awk '{print $5}'`; case `basename $CURSHELL` in 'bash') DEST="$HOME/.bash_profile";; 'zsh') DEST="$HOME/.zshenv";; esac; echo 'export PATH="${HOME}/global-node-packages/bin:$PATH"' >> "$DEST"

Alternatively you can add the following line to ~/.zshenv (if you are using zsh) or ~/.bash_profile (if you are using bash) manually:

export PATH="${HOME}/global-node-packages/bin:$PATH"

Re-open the terminal to apply the changes.

On Linux

Install NodeJS (v16 or newer), Git and Docker using your distro's package manager.

We recommend configuring NodeJS to install global packages to a folder owned by an unprivileged account. Create the folder by running

mkdir ~/global-node-packages

then configure NodeJS to use it

npm config set prefix ~/global-node-packages

Make sure that any executables globally installed by NodeJS are in PATH. That allows running them from any terminal. Open the ~/.bashrc file in a text editor and add the following line at the end:

export PATH="${HOME}/global-node-packages/bin:$PATH"

Re-open the terminal to apply the changes.

II. Install Subsquid CLI

Open a terminal and run

npm install --global @subsquid/cli@latest

This adds the sqd command. Verify that the installation was successful by running

sqd --version

A healthy response should look similar to

@subsquid/cli/2.8.0 linux-x64 node-v20.5.1

III. Run the squid

Open a terminal, navigate to any folder for which you have write permissions and run the following commands to retrieve the squid, enter its folder and install dependencies:
```
sqd init my-snapshot-squid -t https://github.com/subsquid-quests/snapshot-squid
```
```
cd my-snapshot-squid
```
```
npm ci
```

Important

If you're on Windows, the terminal opens in C:\Windows\system32 by default. Do not download your squid there, navigate someplace else.

Press "Get Key" button in the quest card to obtain the snapshotPhaseTwo.key key file. Save it to the ./query-gateway/keys subfolder of the squid folder. The file will be used to identify your local query gateway when locking tSQD to allocate bandwidth and as it operates.
Get the peer ID of your future gateway by running:
```
sqd get-peer-id
```
Register your future gateway using this page.
- Use the peer ID you obtained in the previous step.
- Leave the "Publicly available" switch disabled.
Lock 10 tSQD by selecting your gateway on this page, clicking "Get CU" and submitting the form. Once done, you will begin getting computation units (CUs) once every epoch (~15 minutes).

The "Lock blocks duration" field lets you tune the length of time during which you'll be able to query the network, measured in blocks of Arbitrum Sepolia's L1 (that is, Ethereum Sepolia). The minumum is five hours, but you can opt to lock for longer if you intend to work on the quest over multiple days.

Time Blocks

5 hours (minimum) 1500

24 hours 7200

72 hours 21600

Be aware that you'll need to unlock your tokens manually after the end of this period. The tokens you get back will be used in subsequent quests.

If the locking period expires before you finish your work, simply unlock your tokens, then lock them again.
Wait for about 15 minutes. This is the time it takes for Subsquid Network to enter a new epoch, at the beginning of which CUs will be allocated towards your gateway.
Start the query gateway with
```
sqd up
```
If you'd like to check if the locking was successful, you can inspect the logs of the query gateway container with docker logs <query_gateway_container_name>. After one-two minutes required for the node startup it should contain some lines like this one:
```
[2024-01-31T14:55:06Z INFO  query_gateway::chain_updates] allocated CU: 48300 spent CU: 0
```

Time	Blocks
5 hours (minimum)	1500
24 hours	7200
72 hours	21600

Tip

If you get an error message about unknown shorthand flag: 'd' in -d, that means that you're using an old version of docker that does not support the compose command yet. Update Docker or edit the commands.json file as follows:

         "up": {
         "deps": ["check-key"],
         "description": "Start a PG database",
-        "cmd": ["docker", "compose", "up", "-d"]
+        "cmd": ["docker-compose", "up", "-d"]
       },
       "down": {
         "description": "Drop a PG database",
-        "cmd": ["docker", "compose", "down"]
+        "cmd": ["docker-compose", "down"]
       },

Build the squid code
```
sqd build
```

Start your squid with

sqd run .

The command should output lines like these:

[api] 23:33:48 WARN  sqd:graphql-server enabling dumb in-memory cache (size: 100mb, ttl: 1000ms, max-age: 1000ms)
[api] 23:33:48 INFO  sqd:graphql-server listening on port 4350
[processor] 23:33:49 INFO  sqd:processor processing blocks from 11000000
[processor] 23:33:49 INFO  sqd:processor using archive data source
[processor] 23:33:49 INFO  sqd:processor prometheus metrics are served at port 36935
[processor] 23:33:52 INFO  sqd:processor 11005159 / 18377705, rate: 1756 blocks/sec, mapping: 352 blocks/sec, 311 items/sec, eta: 1h 10m
[processor] 23:33:57 INFO  sqd:processor 11010199 / 18377705, rate: 1735 blocks/sec, mapping: 488 blocks/sec, 428 items/sec, eta: 1h 11m

The squid should sync in about 1.5 hours.

Tip

Do not worry if the squid fails: any progress it made is saved. Simply restart it if it happens.

When done, stop the squid processor with Ctrl-C, then stop and remove the auxiliary containers with

sqd down

After the locking period ends, go to the gateways page and unlock your tSQD - you will need them for other quests.

Quest Info

Category	Skill Level	Time required (minutes)	Max Participants	Reward	Status
Squid Deployment	$\textcolor{green}{\textsf{Simple}}$	~100	-	$\textcolor{red}{\textsf{20tSQD}}$	open

Acceptance critera