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Rosetta API

Overview

The Rosetta API is a REST API complying with the Rosetta API Specification with a focus on blockchain data integration. This server enables exchanges to be able to integrate and work with the Hedera Hashgraph network. The server is written in Golang and is largely based on the rosetta-sdk-go. Its main job is to respond to Rosetta requests, to the extent allowed by Hedera, while fetching information from the mirror node database.

Architecture

Architecture

The rosetta-sdk-go takes care of a significant part of the entity model definitions and API work. The rosetta API server has four main components:

Domain models

These are models internal to the system allowing for safe and easy serialization and passing off information. These are ultimately converted to/from rosetta models or are marshaled from database records.

Repositories

These are repositories used for fetching data from the mirror node database and marshaling it into the domain models. They provide an abstraction from the persistence layer and allow the services to request the necessary data.

Business Logic Services

These services execute business logic in response to requests from client applications. They make use of the repositories to gather the necessary domain models, convert them to the rosetta types, and return them back to the client.

API Controllers

These are structures coming out of the box with rosetta-sdk-go. These handle the raw requests, marshaling/unmarshaling the data, and triggering the business logic services.

Getting Started

Running Locally

The recommended way to run Rosetta locally is to use the all-in-one docker image. Below are the steps to build the image for a Hedera mirror node release. Please replace the example release v0.60.0 with the latest release from our releases page.

  1. Download the Dockerfile.

  2. Run docker build --build-arg GIT_REF=v0.60.0 -t hedera-mirror-rosetta:0.60.0 .

Configure and run the server in online mode:

  1. Follow the guide to configure requester pays for Hedera testnet.

  2. Set the desired configuration for both the Importer and Rosetta API in a new application.yml file to be mounted to the container. Alternatively, every property can be also be set via corresponding environment variables that can be passed to the container. For example, the YAML property hedera.mirror.importer.startDate can be set as -e HEDERA_MIRROR_IMPORTER_STARTDATE=1970-01-01T01:01:00Z.

  3. Set hedera.mirror.importer.startDate to 15 minutes before UTC now and zero the seconds, for example, if UTC now is 2021-12-06T15:25:20Z, startDate should set to 2021-12-06T15:10:00Z. Setting startDate properly can make the importer get the genesis account balance file faster.

  4. To automatically restore the embedded PostgreSQL database to a particular database snapshot, pass a URL to a backup file via -e RESTORE=https://example.com/db.tar. The database dump should be in the format specified in the backup section of the database upgrade documentation. The container database should be empty otherwise the restore process will be skipped.

  5. To use custom passwords for the database owner (used by importer) and the rosetta user (used by rosetta server), set env variables OWNER_PASSWORD and ROSETTA_PASSWORD accordingly.

  6. Run the server from the all-in-one docker image with the appropriate NETWORK specified:

docker run -d -e MODE=online -e NETWORK=testnet \
  -v ${PWD}/application.yml:/app/importer/application.yml \
  -p 5432:5432 -p 5700:5700 hedera-mirror-rosetta:0.60.0

The server should be reachable at http://localhost:5700. Note the server can also run in offline mode by passing -e MODE=offline.

Before running any tests, we need to make sure the server has ingested the genesis balance file and the genesis block. This can be done using the shell script wait-for-mirror-node.sh. The script will report that mirror node syncing has started when the genesis information is available.

A sample configuration file is provided to run rosetta-cli tests. Please refer to the official guide for the options.

You can run the rosetta-cli check:data command as is. The data configuration section is set with "start_index": 1 to work around the known rosetta-cli performance issue of loading large genesis account balance file.

Genesis Balance File

As an alternative, run the script script to get the genesis account balance file.

The get-genesis-balance.sh script takes the following form

./get-genesis-balance.sh <network> <account_limit> <transfer_window_ns>

  • network - The Hedera network to validate against. Options include demo or testnet with a default of demo
  • account_limit - The max number of accounts to list in the file. Default is 20.
  • transfer_window_ns - The additional ns duration added to the starting_timestamp to search for accounts when an account limit is used. Default is 1 week i.e. 604800000000000 ns

Once the get-genesis-balance.sh testnet command is executed, it'll write the file to testnet/data_genesis_balances.json. Note the script uses PostgreSQL's command line client psql to query the database for genesis account balance information, so please install psql beforehand.

check:data

In order to run the rosetta-cli check:data command, run the following after obtaining the data_genesis_balances.json file.

./run-validation.sh testnet data

check:construction

In order to run the rosetta-cli check:construction command with the DSL spec in testnet/testnet.ros, you need two testnet accounts with the private keys and set prefunded_accounts in testnet/validation.json as follows:

{
  "construction": {
    "prefunded_accounts": [
      {
        "privkey": "key1",
        "account_identifier": {
          "address": "0.0.xxx"
        },
        "curve_type": "edwards25519",
        "currency": {
          "symbol": "HBAR",
          "decimals": 8,
          "metadata": {
            "issuer": "Hedera"
          }
        }
      },
      {
        "privkey": "key2",
        "account_identifier": {
          "address": "0.0.yyy"
        },
        "curve_type": "edwards25519",
        "currency": {
          "symbol": "HBAR",
          "decimals": 8,
          "metadata": {
            "issuer": "Hedera"
          }
        }
      }
    ]
  }
}

Note you can follow the account creation guide to get testnet accounts.

After updating the validation.json file run

./run-validation.sh testnet construction

Acceptance Tests

The Rosetta API uses Postman tests to verify proper operation. The Newman command-line collection runner is used to execute the tests against a remote server. To use newman, either the executable binary or Docker approach can be used. With either approach, a base_url variable can be supplied to customize the target server.

Executable

First ensure newman is installed locally using npm, then execute newman.

npm install -g newman
newman run charts/hedera-mirror-rosetta/postman.json --env-var base_url=https://previewnet.mirrornode.hedera.com/rosetta

Docker

docker run --rm -v "${PWD}/charts/hedera-mirror-rosetta/postman.json:/tmp/postman.json" -t postman/newman run /tmp/postman.json --env-var base_url=https://previewnet.mirrornode.hedera.com/rosetta

Note: To test against an instance running on the same machine as Docker use your local IP instead of 127.0.0.1.

Data Retention

Data retention is disabled in the rosetta docker image with the following defaults:

export DATA_RETENTION_BATCHPERIOD=1d
export DATA_RETENTION_ENABLED=false
export DATA_RETENTION_FREQUENCY=7d
export DATA_RETENTION_PERIOD=90d

The configuration can be overridden when creating the rosetta container, for example, to enable it and set the retention period to 30 days,

docker run -d -e MODE=online -e NETWORK=testnet \
  -e DATA_RETENTION_ENABLED=true -e DATA_RETENTION_PERIOD=30d \
  -p 5432:5432 -p 5700:5700 hedera-mirror-rosetta:0.60.0