polygon-rosetta provides an implementation of the Rosetta API for Polygon in Golang. If you haven't heard of the Rosetta API, you can find more information here.

• Comprehensive tracking of all MATIC balance changes
• Stateless, offline, curve-based transaction construction (with address checksum validation)
• Atomic balance lookups using go-ethereum's GraphQL Endpoint
• Idempotent access to all transaction traces and receipts

As specified in the Rosetta API Principles, all Rosetta implementations must be deployable via Docker and support running via either an online or offline mode.

YOU MUST INSTALL DOCKER FOR THE FOLLOWING INSTRUCTIONS TO WORK. YOU CAN DOWNLOAD DOCKER HERE.

Running the following commands will create a Docker image called polygon-rosetta:latest.

To download the pre-built Docker image from the latest release, run:

curl -sSfL https://raw.githubusercontent.com/maticnetwork/polygon-rosetta/master/install.sh | sh -s

After cloning this repository, run the following to build the heimdall and bor node:

make build-node-local

run the following to build the rosetta implementation:

make build-rosetta-local

Alternatively, you can build a binary for faster testing cycles:

make build-rosetta-local-bin

Running the following commands will start a Docker container in detached mode with a data directory at <working directory>/polygon-data and the Rosetta API accessible at port 8080.

• MODE (required) - Determines if Rosetta can make outbound connections. Options: ONLINE or OFFLINE.
• NETWORK (required) - Polygon network to launch and/or communicate with. Options: MAINNET or TESTNET.
• PORT(required) - Which port to use for Rosetta.
• BOR (optional) - Point to a remote bor node instead of initializing one
• SKIP_GETH_ADMIN (optional, default: FALSE) - Instruct Rosetta to not use the geth admin RPC calls. This is typically disabled by hosted blockchain node services.
• GETH_HEADERS (optional) - Pass a key:value comma-separated list to be passed to the geth clients. e.g. X-Auth-Token:12345-ABCDE,X-Other-Header:SomeOtherValue

NETWORK=MAINNET docker-compose -p polygon -f dockerfiles/docker-compose.yml up bor heimdall

If you cloned the repository, you can run make run-node-mainnet.

NETWORK=TESTNET docker-compose -p polygon -f dockerfiles/docker-compose.yml up bor heimdall

If you cloned the repository, you can run make run-node-testnet.

NETWORK=MAINNET docker-compose -p polygon -f dockerfiles/docker-compose.yml up rosetta

If you cloned the repository, you can run make run-mainnet-online.

NETWORK=MAINNET BOR=<NODE URL> docker-compose -p polygon -f dockerfiles/docker-compose.yml up rosetta

If you cloned the repository, you can run make run-mainnet-remote bor=<NODE_URL>.

NETWORK=MAINNET docker-compose -p polygon -f dockerfiles/docker-compose.yml up rosetta_offline

If you cloned the repository, you can run make run-mainnet-offline.

NETWORK=TESTNET docker-compose -p polygon -f dockerfiles/docker-compose.yml up rosetta

If you cloned the repository, you can run make run-testnet-online.

NETWORK=TESTNET BOR=<NODE URL> docker-compose -p polygon -f dockerfiles/docker-compose.yml up rosetta

If you cloned the repository, you can run make run-testnet-remote bor=<NODE_URL>.

NETWORK=TESTNET docker-compose -p polygon -f dockerfiles/docker-compose.yml up rosetta_offline

If you cloned the repository, you can run make run-testnet-offline.

You can also run the polygon-rosetta integration locally using a binary

make run-bin-testnet-offline

make run-bin-testnet-online bor=<NODE_URL>:8545

polygon-rosetta has been tested on an AWS c5.2xlarge instance. This instance type has 8 vCPU and 16 GB of RAM. If you use a computer with less than 16 GB of RAM, it is possible that polygon-rosetta will exit with an OOM error.

To increase the load polygon-rosetta can handle, it is recommended to tune your OS settings to allow for more connections. On a linux-based OS, you can run the following commands (source):

sysctl -w net.ipv4.tcp_tw_reuse=1
sysctl -w net.core.rmem_max=16777216
sysctl -w net.core.wmem_max=16777216
sysctl -w net.ipv4.tcp_max_syn_backlog=10000
sysctl -w net.core.somaxconn=10000
sysctl -p (when done)

We have not tested polygon-rosetta with net.ipv4.tcp_tw_recycle and do not recommend enabling it.

You should also modify your open file settings to 100000. This can be done on a linux-based OS with the command: ulimit -n 100000.

To validate polygon-rosetta, install rosetta-cli and run one of the following commands:

• rosetta-cli check:data --configuration-file rosetta-cli-conf/testnet/config.json
• rosetta-cli check:construction --configuration-file rosetta-cli-conf/testnet/config.json
• rosetta-cli check:data --configuration-file rosetta-cli-conf/mainnet/config.json

• Add ERC-20 Rosetta Module to enable reading ERC-20 token transfers and transaction construction
• Rosetta API /mempool/* implementation
• Add more methods to the /call endpoint (currently only support eth_getTransactionReceipt)
• Add CI test using rosetta-cli to run on each PR (likely on a regtest network)

Please reach out on our community if you want to tackle anything on this list!

• make deps to install dependencies
• make test to run tests
• make lint to lint the source code
• make salus to check for security concerns
• make build-local to build a Docker image from the local context
• make coverage-local to generate a coverage report

Upon first glance, using a single Dockerfile to start all services required for a particular API (i.e. the node runtime and an indexer DB) may sound antithetical. However, we have found that restricting deployment to a single container makes the orchestration of multiple nodes much easier because of coordinated start/stop and single volume mounting.

Although Rosetta Spec has strongly recommended using a single dockerfile so that the service that manages the nodes can gracefully start and stop them, we have found out that due to the special dual-node setup with Polygon it makes more sense to have separate dockerfiles that bootstrap each services and uses docker-compose to bring up all the dependencies.

This project is available open source under the terms of the Apache 2.0 License.

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