# ar-io sdk

The ar.io SDK provides functionality for interacting with the ar.io ecosystem of services (e.g. gateways and observers) and protocols (e.g. ArNS). It is available for both NodeJS and Web environments.

# Prerequisites

node>=v18.0.0
npm or yarn

# Installation

npm install @ar.io/sdk

yarn add @ar.io/sdk

# Quick Start

Loading the gateway list in NodeJS.

import { IO } from '@ar.io/sdk';

const io = IO.init();
const gateways = await io.getGateways();

console.log(gateways);

Output

{
  "QGWqtJdLLgm2ehFWiiPzMaoFLD50CnGuzZIPEdoDRGQ": {
    "end": 0,
    "observerWallet": "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs",
    "operatorStake": 250000000000, // value in mIO
    "settings": {
      "fqdn": "ar-io.dev",
      "label": "AR.IO Test",
      "note": "Test Gateway operated by PDS for the AR.IO ecosystem.",
      "port": 443,
      "properties": "raJgvbFU-YAnku-WsupIdbTsqqGLQiYpGzoqk9SCVgY",
      "protocol": "https"
    },
    "start": 1256694,
    "stats": {
      "failedConsecutiveEpochs": 0,
      "passedEpochCount": 30,
      "submittedEpochCount": 30,
      "totalEpochParticipationCount": 31,
      "totalEpochsPrescribedCount": 31
    },
    "status": "joined",
    "vaults": {},
    "weights": {
      "stakeWeight": 25,
      "tenureWeight": 0.9031327160493827,
      "gatewayRewardRatioWeight": 0.96875,
      "observerRewardRatioWeight": 0.96875,
      "compositeWeight": 21.189222170982834,
      "normalizedCompositeWeight": 0.27485583057217183
    }
  }
}

# Usage

The SDK is provided in both CommonJS and ESM formats and is compatible with bundlers such as Webpack, Rollup, and ESbuild. Utilize the appropriately named exports provided by this SDK's package.json (opens new window) based on your project's configuration. Refer to the examples (opens new window) directory to see how to use the SDK in various environments.

# Web

# Bundlers (Webpack, Rollup, ESbuild, etc.)

import { IO } from '@ar.io/sdk/web';

// set up client
const io = IO.init();
// fetch gateways
const gateways = await io.getGateways();

Note: polyfills are only provided when using the named @ar.io/sdk/web export (which requires moduleResolution: nodenext in tsconfig.json). If you are using the default export within a Typescript project (e.g. moduleResolution: node), you will need to provide your own polyfills - specifically crypto, fs and buffer. Refer to examples/webpack (opens new window) and examples/vite (opens new window) for references in how to properly provide those polyfills. For other project configurations, refer to your bundler's documentation for more information on how to provide the necessary polyfills.

# Browser

<script type="module">
  import { IO } from 'https://unpkg.com/@ar.io/sdk';

  // set up client
  const io = IO.init();
  // fetch gateways
  const gateways = await io.getGateways();
</script>

# Node

# ESM (NodeNext)

import { IO } from '@ar.io/sdk/node';

// set up client
const io = IO.init();
// fetch gateways
const gateways = await io.getGateways();

# CJS

import { IO } from '@ar.io/sdk';

// set up client
const io = IO.init();
// fetch gateways
const gateways = await io.getGateways();

# Typescript

The SDK provides TypeScript types. When you import the SDK in a TypeScript project types are exported from ./lib/types/[node/web]/index.d.ts and should be automatically recognized by package managers, offering benefits such as type-checking and autocompletion.

NOTE: Typescript version 5.3 or higher is recommended.

# IOToken & mIOToken

The ArIO contract stores all values as mIO (milli-IO) to avoid floating-point arithmetic issues. The SDK provides an IOToken and mIOToken classes to handle the conversion between IO and mIO, along with rounding logic for precision.

All contract interactions expect values in mIO. If numbers are provided as inputs, they are assumed to be in raw mIO values.

# Converting IO to mIO

import { IOToken, mIOToken } from '@ar.io/sdk';

const ioValue = 1;
const mIOValue = new IOToken(ioValue).toMIO();
console.log(mIOValue); // 1000000 (mIO)

const mIOValue = 1_000_000;
const ioValue = new mIOToken(mIOValue).toIO();
console.log(ioValue); // 1 (IO)

# IO Process

# APIs

# `init({ signer })`

Factory function to that creates a read-only or writeable client. By providing a signer additional write APIs that require signing, like joinNetwork and delegateStake are available. By default, a read-only client is returned and no write APIs are available.

// read-only client
const io = IO.init()

// read-write client for browser environments
const io = IO.init({ signer: new ArConnectSigner(window.arweaveWallet, Arweave.init({}))});

// read-write client for node environments
const io = IO.init({ signer: new ArweaveSigner(JWK) });

# `getInfo()`

Retrieves the information of the IO process.

const io = IO.init();
const info = await io.getInfo();

Output

{
  "name": "Testnet IO",
  "ticker": "tIO",
  "owner": "QGWqtJdLLgm2ehFWiiPzMaoFLD50CnGuzZIPEdoDRGQ",
  "denomination": "IO"
}

# `getBalance({ address })`

Retrieves the balance of the specified wallet address.

const io = IO.init();
// the balance will be returned in mIO as a value
const balance = await io
  .getBalance({
    address: 'INSERT_WALLET_ADDRESS',
  })
  .then((balance) => new mIOToken().toIO());

console.log(balance.valueOf());

Output

// value in IO
1_000_000

# `getBalances({ cursor, limit, sortBy, sortOrder })`

Retrieves the balances of the IO process in mIO, paginated and sorted by the specified criteria. The cursor used for pagination is the last wallet address from the previous request.

const io = IO.init();
const balances = await io.getBalances({
  cursor: '-4xgjroXENKYhTWqrBo57HQwvDL51mMdfsdsxJy6Y2Z_sA',
  limit: 1,
  sortBy: 'balance',
  sortOrder: 'desc',
});

Output

{
  "items": [
    {
      "address": "-4xgjroXENKYhTWqrBo57HQwvDL51mMvSxJy6Y2Z_sA",
      "balance": 1000000
    }
  ],
  "hasMore": true,
  "nextCursor": "-7vXsQZQDk8TMDlpiSLy3CnLi5PDPlAaN2DaynORpck",
  "totalItems": 1789,
  "sortBy": "balance",
  "sortOrder": "desc"
}

# `getGateway({ address })`

Retrieves a gateway's info by its staking wallet address.

const io = IO.init();
const gateway = await io.getGateway({
  address: 'INSERT_GATEWAY_ADDRESS',
});

Output

{
  "end": 0,
  "observerWallet": "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs",
  "operatorStake": 250000000000, // value in mIO
  "settings": {
    "fqdn": "ar-io.dev",
    "label": "AR.IO Test",
    "note": "Test Gateway operated by PDS for the AR.IO ecosystem.",
    "port": 443,
    "properties": "raJgvbFU-YAnku-WsupIdbTsqqGLQiYpGzoqk9SCVgY",
    "protocol": "https"
  },
  "start": 1256694,
  "stats": {
    "failedConsecutiveEpochs": 0,
    "passedEpochCount": 30,
    "submittedEpochCount": 30,
    "totalEpochParticipationCount": 31,
    "totalEpochsPrescribedCount": 31
  },
  "status": "joined",
  "vaults": {}
}

# `getGateways({ cursor, limit, sortBy, sortOrder })`

Retrieves registered gateways of the IO process, using pagination and sorting by the specified criteria. The cursor used for pagination is the last gateway address from the previous request.

const io = IO.init();
const gateways = await io.getGateways({
  limit: 1,
  sortOrder: 'desc',
  sortBy: 'operatorStake',
});

Available sortBy options are any of the keys on the gateway object, e.g. operatorStake, start, status, settings.fqdn, settings.label, settings.note, settings.port, settings.protocol, stats.failedConsecutiveEpochs, stats.passedConsecutiveEpochs, etc.

Output

{
  "items": [
    {
      "gatewayAddress": "QGWqtJdLLgm2ehFWiiPzMaoFLD50CnGuzZIPEdoDRGQ",
      "observerAddress": "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs",
      "operatorStake": 250000000000,
      "settings": {
        "fqdn": "ar-io.dev",
        "label": "AR.IO Test",
        "note": "Test Gateway operated by PDS for the AR.IO ecosystem.",
        "port": 443,
        "properties": "raJgvbFU-YAnku-WsupIdbTsqqGLQiYpGzoqk9SCVgY",
        "protocol": "https"
      },
      "startTimestamp": 1720720620813,
      "stats": {
        "failedConsecutiveEpochs": 0,
        "passedEpochCount": 30,
        "submittedEpochCount": 30,
        "totalEpochParticipationCount": 31,
        "totalEpochsPrescribedCount": 31
      },
      "status": "joined",
      "vaults": {}
    }
  ],
  "hasMore": true,
  "nextCursor": "-4xgjroXENKYhTWqrBo57HQwvDL51mMdfsdsxJy6Y2Z_sA",
  "totalItems": 316,
  "sortBy": "operatorStake",
  "sortOrder": "desc"
}

# `getArNSRecord({ name })`

Retrieves the record info of the specified ArNS name.

const io = IO.init();
const record = await io.getArNSRecord({ name: 'ardrive' });

Output

{
  "processId": "bh9l1cy0aksiL_x9M359faGzM_yjralacHIUo8_nQXM",
  "endTimestamp": 1711122739,
  "startTimestamp": 1694101828,
  "type": "lease",
  "undernames": 100
}

# `getArNSRecords({ cursor, limit, sortBy, sortOrder })`

Retrieves all registered ArNS records of the IO process, paginated and sorted by the specified criteria. The cursor used for pagination is the last ArNS name from the previous request.

const io = IO.init();
// get the 5 newest names
const records = await io.getArNSRecords({
  limit: 5,
  sortBy: 'startTimestamp',
  sortOrder: 'desc',
});

Available sortBy options are any of the keys on the record object, e.g. name, processId, endTimestamp, startTimestamp, type, undernames.

Output

{
  "items": [
    {
      "name": "ao",
      "processId": "eNey-H9RB9uCdoJUvPULb35qhZVXZcEXv8xds4aHhkQ",
      "purchasePrice": 75541282285,
      "startTimestamp": 1720720621424,
      "type": "permabuy",
      "undernames": 10
    },
    {
      "name": "ardrive",
      "processId": "bh9l1cy0aksiL_x9M359faGzM_yjralacHIUo8_nQXM",
      "endTimestamp": 1720720819969,
      "startTimestamp": 1720720620813,
      "type": "lease",
      "undernames": 100
    },
    {
      "name": "arweave",
      "processId": "bh9l1cy0aksiL_x9M359faGzM_yjralacHIUo8_nQXM",
      "endTimestamp": 1720720819969,
      "startTimestamp": 1720720620800,
      "type": "lease",
      "undernames": 100
    },
    {
      "name": "ar-io",
      "processId": "bh9l1cy0aksiL_x9M359faGzM_yjralacHIUo8_nQXM",
      "endTimestamp": 1720720819969,
      "startTimestamp": 1720720619000,
      "type": "lease",
      "undernames": 100
    },
    {
      "name": "fwd",
      "processId": "bh9l1cy0aksiL_x9M359faGzM_yjralacHIUo8_nQXM",
      "endTimestamp": 1720720819969,
      "startTimestamp": 1720720220811,
      "type": "lease",
      "undernames": 100
    }
  ],
  "hasMore": true,
  "nextCursor": "fwdresearch",
  "totalItems": 21740,
  "sortBy": "startTimestamp",
  "sortOrder": "desc"
}

# `getObservations({ epochIndex })`

Returns the epoch-indexed observation list.

const io = IO.init();
const observations = await io.getObservations();

Output

{
  "0": {
    "failureSummaries": {
      "-Tk2DDk8k4zkwtppp_XFKKI5oUgh6IEHygAoN7mD-w8": [
        "Ie2wEEUDKoU26c7IuckHNn3vMFdNQnMvfPBrFzAb3NA",
        "Ie2wEEUDKoU26c7IuckHNn3vMFdNQnMvfPBrFzAb3NA"
      ]
    },
    "reports": {
      "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs": "B6UUjKWjjEWDBvDSMXWNmymfwvgR9EN27z5FTkEVlX4",
      "Ie2wEEUDKoU26c7IuckHNn3vMFdNQnMvfPBrFzAb3NA": "7tKsiQ2fxv0D8ZVN_QEv29fZ8hwFIgHoEDrpeEG0DIs",
      "osZP4D9cqeDvbVFBaEfjIxwc1QLIvRxUBRAxDIX9je8": "aatgznEvC_UPcxp1v0uw_RqydhIfKm4wtt1KCpONBB0",
      "qZ90I67XG68BYIAFVNfm9PUdM7v1XtFTn7u-EOZFAtk": "Bd8SmFK9-ktJRmwIungS8ur6JM-JtpxrvMtjt5JkB1M"
    }
  }
}

# `getDistributions({ epochIndex })`

Returns the current rewards distribution information.

const io = IO.init();
const distributions = await io.getDistributions();

Output

{
  "epochEndHeight": 1382379,
  "epochPeriod": 43,
  "epochStartHeight": 1381660,
  "epochZeroStartHeight": 1350700,
  "nextDistributionHeight": 1382394
}

# `getEpoch({ epochIndex })`

Returns the epoch data for the specified block height.

const io = IO.init();
const epoch = await io.getEpoch({ epochIndex: 0 });

Output

{
  "epochIndex": 0,
  "startTimestamp": 1694101828,
  "endTimestamp": 1711122739,
  "startHeight": 1350700,
  "distributionTimestamp": 1711122739,
  "observations": {
    "failureSummaries": {
      "-Tk2DDk8k4zkwtppp_XFKKI5oUgh6IEHygAoN7mD-w8": [
        "Ie2wEEUDKoU26c7IuckHNn3vMFdNQnMvfPBrFzAb3NA"
      ]
    },
    "reports": {
      "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs": "B6UUjKWjjEWDBvDSMXWNmymfwvgR9EN27z5FTkEVlX4"
    }
  },
  "prescribedNames": ["ardrive", "ar-io", "arweave", "fwd", "ao"],
  "prescribedObservers": [
    {
      "gatewayAddress": "2Fk8lCmDegPg6jjprl57-UCpKmNgYiKwyhkU4vMNDnE",
      "observerAddress": "2Fk8lCmDegPg6jjprl57-UCpKmNgYiKwyhkU4vMNDnE",
      "stake": 10000000000, // value in mIO
      "start": 1292450,
      "stakeWeight": 1,
      "tenureWeight": 0.4494598765432099,
      "gatewayRewardRatioWeight": 1,
      "observerRewardRatioWeight": 1,
      "compositeWeight": 0.4494598765432099,
      "normalizedCompositeWeight": 0.002057032496835938
    }
  ],
  "distributions": {
    "distributedTimestamp": 1711122739,
    "totalEligibleRewards": 100000000,
    "rewards": {
      "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs": 100000000
    }
  }
}

# `getCurrentEpoch()`

Returns the current epoch data.

const io = IO.init();
const epoch = await io.getCurrentEpoch();

Output

{
  "epochIndex": 0,
  "startTimestamp": 1694101828,
  "endTimestamp": 1711122739,
  "startHeight": 1350700,
  "distributionTimestamp": 1711122739,
  "observations": {
    "failureSummaries": {
      "-Tk2DDk8k4zkwtppp_XFKKI5oUgh6IEHygAoN7mD-w8": [
        "Ie2wEEUDKoU26c7IuckHNn3vMFdNQnMvfPBrFzAb3NA"
      ]
    },
    "reports": {
      "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs": "B6UUjKWjjEWDBvDSMXWNmymfwvgR9EN27z5FTkEVlX4"
    }
  },
  "prescribedNames": ["ardrive", "ar-io", "arweave", "fwd", "ao"],
  "prescribedObservers": [
    {
      "gatewayAddress": "2Fk8lCmDegPg6jjprl57-UCpKmNgYiKwyhkU4vMNDnE",
      "observerAddress": "2Fk8lCmDegPg6jjprl57-UCpKmNgYiKwyhkU4vMNDnE",
      "stake": 10000000000, // value in mIO
      "start": 1292450,
      "stakeWeight": 1,
      "tenureWeight": 0.4494598765432099,
      "gatewayRewardRatioWeight": 1,
      "observerRewardRatioWeight": 1,
      "compositeWeight": 0.4494598765432099,
      "normalizedCompositeWeight": 0.002057032496835938
    }
  ],
  "distributions": {
    "distributedTimestamp": 1711122739,
    "totalEligibleRewards": 100000000,
    "rewards": {
      "IPdwa3Mb_9pDD8c2IaJx6aad51Ss-_TfStVwBuhtXMs": 100000000
    }
  }
}

# `getPrescribedObservers({ epochIndex })`

Retrieves the prescribed observers of the IO process. To fetch prescribed observers for a previous epoch set the epochIndex to the desired epoch.

const io = IO.init();
const observers = await io.getPrescribedObservers({ epochIndex: 0 });

Output

[
  {
    "gatewayAddress": "BpQlyhREz4lNGS-y3rSS1WxADfxPpAuing9Lgfdrj2U",
    "observerAddress": "2Fk8lCmDegPg6jjprl57-UCpKmNgYiKwyhkU4vMNDnE",
    "stake": 10000000000, // value in mIO
    "start": 1296976,
    "stakeWeight": 1,
    "tenureWeight": 0.41453703703703704,
    "gatewayRewardRatioWeight": 1,
    "observerRewardRatioWeight": 1,
    "compositeWeight": 0.41453703703703704,
    "normalizedCompositeWeight": 0.0018972019546783507
  }
]

# `getTokenCost({ intent, ...args })`

Calculates the price in mIO to perform the interaction in question, e.g. a Buy-record interaction, where args are the specific params for that interaction.

const price = await io
  .getTokenCost({
    intent: 'Buy-Record',
    name: 'ar-io',
    type: 'permabuy',
  })
  .then((p) => new mIOToken(p).toIO());
// Price is returned as mio, convert to IO and log it out
console.log({ price: price.valueOf() });

Output

{ "price": 1642.62 }