NO LONGER MAINTAINED

Important

Since the launch of Kaia Blockchain this repository has been parked in favour of the new open-source projects in Kaia's Github. Contributors have now moved there continuing with massive open-source contributions to our blockchain ecosystem. A big thank you to everyone who has contributed to this repository.

For future development and contributions, please refer to the new rosetta-kaia repository.

For more information about Klaytn's chain merge with Finschia blockchain please refer to the launching of Kaia blockchain - kaia.io.

Rosetta Klaytn

Overview

rosetta-klaytn provides an implementation of the Rosetta API for Klaytn in Golang, based off the rosetta-ethereum reference implementation provided by Coinbase. If you haven't heard of the Rosetta API, you can find more information here. The project started with a fork of 23561f903bc93d4fa97bebc1fbbe4c7e5b374e5e commit, a commit on February 25, 2022.

Features

• Comprehensive tracking of all ETH 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

System Requirements

For rosetta-klaytn

rosetta-klaytn 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 rosetta-klaytn will exit with an OOM error.

Recommended OS Settings

To increase the load rosetta-klaytn 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 rosetta-klaytn 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.

For Klaytn Node

For Klaytn Node, you should operate an EN(Endpoint Node) with arcive mode. And also you can see the system requirements for Endpoint Node in here.

Recommended kend.conf configuration

To serve rosetta-klaytn API, EN should enable rpc api like RPC_ENABLE=1 and serve klay, debug, txpool, governance and admin(admin rpc api is optional) rpc apis.

# rpc options setting
RPC_ENABLE=1 # if this is set, the following options will be used
RPC_API="admin,debug,klay,txpool,governance"
RPC_CONCURRENCYLIMIT=48000
RPC_READ_TIMEOUT=48000
RPC_WRITE_TIMEOUT=48000
RPC_IDLE_TIMEOUT=48000
RPC_EXECUTION_TIMEOUT=48000

# Raw options e.g) "--txpool.nolocals"
ADDITIONAL="--gcmode archive"

To run EN in archive mode, you can append the --gcmode archive flag to ADDITIONAL.

Usage

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.

Install

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

From GitHub

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

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

Do not try to install rosetta-klaytn using GitHub Packages!

From Source

After cloning this repository, run:

make build-local

Run

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

Configuration Environment Variables

• MODE (required) - Determines if Rosetta can make outbound connections. Options: ONLINE or OFFLINE.
• NETWORK (required) - Klaytn network to launch and/or communicate with. Options: MAINNET or TESTNET.
• PORT(required) - Which port to use for Rosetta.
• KEN (optional) - Point to a remote klaytn EN node instead of initializing one
• SKIP_ADMIN (optional, default: FALSE) - Instruct Rosetta to not use the ken admin RPC calls. This is typically disabled by hosted blockchain node services.

Mainnet:Online

docker run -d --rm --ulimit "nofile=100000:100000" -v "$(pwd)/klaytn-data:/data" -e "MODE=ONLINE" -e "NETWORK=MAINNET" -e "PORT=8080" -p 8080:8080 -p 30303:30303 rosetta-klaytn:latest

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

Mainnet:Online (Remote)

docker run -d --rm --ulimit "nofile=100000:100000" -e "MODE=ONLINE" -e "NETWORK=MAINNET" -e "PORT=8080" -e "KEN=<NODE URL>" -p 8080:8080 -p 30303:30303 rosetta-klaytn:latest

If you cloned the repository, you can run make run-mainnet-remote ken=<NODE URL>.

Mainnet:Offline

docker run -d --rm -e "MODE=OFFLINE" -e "NETWORK=MAINNET" -e "PORT=8081" -p 8081:8081 rosetta-klaytn:latest

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

Testnet:Online

docker run -d --rm --ulimit "nofile=100000:100000" -v "$(pwd)/klaytn-data:/data" -e "MODE=ONLINE" -e "NETWORK=TESTNET" -e "PORT=8080" -p 8080:8080 -p 30303:30303 rosetta-klaytn:latest

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

Testnet:Online (Remote)

docker run -d --rm --ulimit "nofile=100000:100000" -e "MODE=ONLINE" -e "NETWORK=TESTNET" -e "PORT=8080" -e "KEN=<NODE URL>" -p 8080:8080 -p 30303:30303 rosetta-klaytn:latest

If you cloned the repository, you can run make run-testnet-remote ken=<NODE URL>.

Testnet:Offline

docker run -d --rm -e "MODE=OFFLINE" -e "NETWORK=TESTNET" -e "PORT=8081" -p 8081:8081 rosetta-klaytn:latest

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

If you are using MacOS M1, you might need to add --platform linux/amd64 flag like below when you run docker container.

docker run --platform linux/amd64 -d --rm -e "MODE=OFFLINE" -e "NETWORK=TESTNET" -e "PORT=8081" -p 8081:8081 rosetta-klaytn:latest

Testing with rosetta-cli

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

• rosetta-cli check:data --configuration-file rosetta-cli-conf/testnet/config.json - This command validates that the Data API implementation is correct using the Klaytn testnet node. It also ensures that the implementation does not miss any balance-changing operations.
• rosetta-cli check:construction --configuration-file rosetta-cli-conf/testnet/config.json - This command validates the Construction API implementation. It also verifies transaction construction, signing, and submissions to the testnet network.
• rosetta-cli check:data --configuration-file rosetta-cli-conf/mainnet/config.json - This command validates that the Data API implementation is correct using the Klaytn mainnet node. It also ensures that the implementation does not miss any balance-changing operations.

Issues

Interested in helping fix issues in this repository? You can find to-dos in the Issues section. Be sure to reach out on our community before you tackle anything on this list.

Development

• 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

How to create test data for block testing in client_test.go

We need to execute client_test.go by generating the API result and creating the expected result as json data.

Generate a test data in the network

You can create test data by sending a transaction to the network.

Alternatively, it is okay to use data that already exists in the network.

Make test data files

In this step, the return data of the API called when the client function is executed is made into a json file, and when the actual test is performed, the data is returned using a mock.

Create a block_{block number}.json file using the value of the "result" field of the API result below.

curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_getBlockByNumber","params":["0x{block number}", true],"id":1}' http://{your en url}:8551 > block.txt

Create a block_receipts_0x{block hash}.json file using the value of the "result" field of the API result below.

curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"klay_getBlockReceipts","params":["0x{block hash}"],"id":1}' http://{your en url}:8551 > receipts.txt

Create a block_trace_0x{block hash}.json file using the value of the "result" field of the API result below.

curl -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"debug_traceBlockByHash","params":["0x{block hash}", {"tracer": "fastCallTracer"}],"id":1}' http://{your en url}:8551 > trace.txt

Make expected response data

Create a response object to be returned based on the above result in the block_response_{block number}.json file.

You can refer to block_response_1078.json file.

License

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

© 2021 Coinbase