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The exchange module is the heart of the Injective Chain which enables fully decentralized spot and derivative exchange. It is the sine qua non module of the chain and integrates tightly with the auction, insurance, oracle, and peggy modules. The exchange protocol enables traders to create and trade on arbitrary spot and derivative markets. The entire process of orderbook management, trade execution, order matching and settlement occurs on chain through the logic codified by the exchange module.

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Messages

Let’s explore (and provide examples) the Messages that the Exchange module exports and we can use to interact with the Injective chain.

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MsgDeposit

This Message is used to send coins from the Bank module to a wallet’s subaccount 
import { MsgDeposit, MsgBroadcasterWithPk, getEthereumAddress } from '@injectivelabs/sdk-ts'
import { BigNumberInBase } from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'

const amount = {
  denom: 'inj',
  amount: new BigNumberInBase(1).toWei()
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgDeposit.fromJSON({
  amount,
  subaccountId,
  injectiveAddress
});

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgWithdraw

This Message is used to send coins from the wallet’s subaccount back to the users Bank funds 
import { MsgWithdraw, MsgBroadcasterWithPk, getEthereumAddress } from '@injectivelabs/sdk-ts'
import { BigNumberInBase } from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'

const amount = {
  denom: 'inj',
  amount: new BigNumberInBase(1).toWei()
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgWithdraw.fromJSON({
  amount,
  subaccountId,
  injectiveAddress
});

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgCreateSpotLimitOrder

This Message is used to create a spot limit order 
import {
  MsgCreateSpotLimitOrder,
  MsgBroadcasterWithPk,
  getEthereumAddress,
  getSpotMarketTensMultiplier
} from '@injectivelabs/sdk-ts'
import { BigNumberInBase, spotPriceToChainPriceToFixed, spotQuantityToChainQuantityToFixed } from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const feeRecipient = 'inj1...'
const market = {
  marketId: '0x...',
  baseDecimals: 18,
  quoteDecimals: 6,
  minPriceTickSize: '', /* fetched from the chain */
  minQuantityTickSize: '', /* fetched from the chain */
  priceTensMultiplier: '', /** can be fetched from getSpotMarketTensMultiplier */
  quantityTensMultiplier: '', /** can be fetched from getSpotMarketTensMultiplier */
}

const order = {
  price: 1,
  quantity: 1
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgCreateSpotLimitOrder.fromJSON({
  subaccountId,
  injectiveAddress,
  orderType: 1, /* Buy */
  price: spotPriceToChainPriceToFixed({
    value: order.price,
    tensMultiplier: market.priceTensMultiplier,
    baseDecimals: market.baseDecimals,
    quoteDecimals: market.quoteDecimals
  }),
  quantity: spotQuantityToChainQuantityToFixed({
    value: order.quantity,
    tensMultiplier: market.quantityTensMultiplier,
    baseDecimals: market.baseDecimals
  }),
  marketId: market.marketId,
  feeRecipient: feeRecipient
})

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgCreateSpotMarketOrder

This Message is used to create a spot market order 
import {
  MsgCreateSpotMarketOrder,
  MsgBroadcasterWithPk,
  getEthereumAddress,
  getSpotMarketTensMultiplier
} from '@injectivelabs/sdk-ts'
import { BigNumberInBase, spotPriceToChainPriceToFixed, spotQuantityToChainQuantityToFixed } from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const feeRecipient = 'inj1...'
const market = {
  marketId: '0x...',
  baseDecimals: 18,
  quoteDecimals: 6,
  minPriceTickSize: '', /* fetched from the chain */
  minQuantityTickSize: '', /* fetched from the chain */
  priceTensMultiplier: '', /** can be fetched from getSpotMarketTensMultiplier */
  quantityTensMultiplier: '', /** can be fetched from getSpotMarketTensMultiplier */
}
const order = {
  price: 10,
  quantity: 1
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgCreateSpotMarketOrder.fromJSON({
  subaccountId,
  injectiveAddress,
  orderType: 1, /* Buy */
  price: spotPriceToChainPriceToFixed({
    value: order.price,
    tensMultiplier: market.priceTensMultiplier,
    baseDecimals: market.baseDecimals,
    quoteDecimals: market.quoteDecimals
  }),
  quantity: spotQuantityToChainQuantityToFixed({
    value: order.quantity,
    tensMultiplier: market.quantityTensMultiplier,
    baseDecimals: market.baseDecimals
  }),
  marketId: market.marketId,
  feeRecipient: feeRecipient,
})

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgCreateDerivativeLimitOrder

This Message is used to create a derivative limit order 
import {
  MsgCreateDerivativeLimitOrder,
  MsgBroadcasterWithPk,
  getEthereumAddress,
  getDerivativeMarketTensMultiplier
} from '@injectivelabs/sdk-ts'
import {
  BigNumberInBase,
  derivativePriceToChainPriceToFixed,
  derivativeQuantityToChainQuantityToFixed,
  derivativeMarginToChainMarginToFixed
} from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const feeRecipient = 'inj1...'
const market = {
  marketId: '0x...',
  baseDecimals: 18,
  quoteDecimals: 6,
  minPriceTickSize: '', /* fetched from the chain */
  minQuantityTickSize: '', /* fetched from the chain */
  priceTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
  quantityTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
}
const order = {
  price: 10,
  quantity: 1,
  margin: 10
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgCreateDerivativeLimitOrder.fromJSON(
  orderType: 1 /* Buy */,
  triggerPrice: '0',
  injectiveAddress,
  price: derivativePriceToChainPriceToFixed({
    value: order.price,
    quoteDecimals: market.quoteDecimals
  }),
  quantity: derivativeQuantityToChainQuantityToFixed({ value: order.quantity }),
  margin: derivativeMarginToChainMarginToFixed({
    value: order.margin,
    quoteDecimals: market.quoteDecimals
  }),
  marketId: market.marketId,
  feeRecipient: feeRecipient,
  subaccountId: subaccountI
})

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgCreateDerivativeMarketOrder

This Message is used to create a derivative market order 
import {
  MsgCreateDerivativeMarketOrder,
  MsgBroadcasterWithPk,
  getEthereumAddress,
  getDerivativeMarketTensMultiplier
} from '@injectivelabs/sdk-ts'
import {
  BigNumberInBase,
  derivativePriceToChainPriceToFixed,
  derivativeQuantityToChainQuantityToFixed,
  derivativeMarginToChainMarginToFixed
} from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const feeRecipient = 'inj1...'
const market = {
  marketId: '0x...',
  baseDecimals: 18,
  quoteDecimals: 6,
  minPriceTickSize: '', /* fetched from the chain */
  minQuantityTickSize: '', /* fetched from the chain */
  priceTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
  quantityTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
}
const order = {
  price: 10,
  quantity: 1,
  margin: 10
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgCreateDerivativeMarketOrder.fromJSON(
  orderType: 1 /* Buy */,
  triggerPrice: '0',
  injectiveAddress,
  price: derivativePriceToChainPriceToFixed({
    value: order.price,
    tensMultiplier: market.priceTensMultiplier,
    quoteDecimals: market.quoteDecimals
  }),
  quantity: derivativeQuantityToChainQuantityToFixed({
    value: order.quantity,
    tensMultiplier: market.quantityTensMultiplier,
  }),
  margin: derivativeMarginToChainMarginToFixed({
    value: order.margin,
    quoteDecimals: market.quoteDecimals,
    tensMultiplier: priceTensMultiplier,
  }),
  marketId: market.marketId,
  feeRecipient: feeRecipient,
  subaccountId: subaccountI
})

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgBatchUpdateOrders

This Message is used to batch update orders on the chain 
import {
  MsgBatchUpdateOrders,
  MsgBroadcasterWithPk,
  getEthereumAddress,
  getDerivativeMarketTensMultiplier
} from '@injectivelabs/sdk-ts'
import {
  BigNumberInBase,
  derivativePriceToChainPriceToFixed,
  derivativeQuantityToChainQuantityToFixed,
  derivativeMarginToChainMarginToFixed
} from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const feeRecipient = 'inj1...'
const derivativeMarket = {
  marketId: '0x...',
  baseDecimals: 18,
  quoteDecimals: 6,
  minPriceTickSize: '', /* fetched from the chain */
  minQuantityTickSize: '', /* fetched from the chain */
  priceTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
  quantityTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
}
const derivativeOrder = {
  price: 10,
  quantity: 1,
  margin: 10
}
const spotMarket = {
  marketId: '0x...',
  baseDecimals: 18,
  quoteDecimals: 6,
  minPriceTickSize: '', /* fetched from the chain */
  minQuantityTickSize: '', /* fetched from the chain */
  priceTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
  quantityTensMultiplier: '', /** can be fetched from getDerivativeMarketTensMultiplier */
}
const spotOrder = {
  price: 10,
  quantity: 1,
  margin: 10
}

const ethereumAddress = getEthereumAddress(injectiveAddress)
const subaccountIndex = 0
const suffix = '0'.repeat(23) + subaccountIndex
const subaccountId = ethereumAddress + suffix

const msg = MsgBatchUpdateOrders.fromJSON({
  injectiveAddress,
  subaccountId: subaccountId,
  derivativeOrdersToCreate: [
    {
      orderType: derivativeOrder.orderType as GrpcOrderType,
      price: derivativePriceToChainPriceToFixed({
        value: derivativeOrder.price,
        quoteDecimals: 6 /* USDT has 6 decimals */,
      }),
      quantity: derivativeQuantityToChainQuantityToFixed({
        value: derivativeOrder.quantity,
      }),
      margin: derivativeMarginToChainMarginToFixed({
        value: margin,
        quoteDecimals: 6 /* USDT has 6 decimals */,
      }),
      marketId: derivativeMarket.marketId,
      feeRecipient: injectiveAddress,
    },
  ],
  spotOrdersToCreate: [
    {
      orderType: spotOrder.orderType as GrpcOrderType,
      price: spotPriceToChainPriceToFixed({
        value: spotOrder.price,
        baseDecimals: 18 /* INJ has 18 decimals */,
        quoteDecimals: 6 /* USDT has 6 decimals */,
      }),
      quantity: spotQuantityToChainQuantityToFixed({
        value: spotOrder.quantity,
        baseDecimals: 18 /* INJ has 18 decimals */,
      }),
      marketId: spotMarket.marketId,
      feeRecipient: injectiveAddress,
    },
  ],
});

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgBatchCancelSpotOrders

This Message is used to batch cancel spot orders on the chain 
import { MsgBatchCancelSpotOrders, MsgBroadcasterWithPk } from '@injectivelabs/sdk-ts'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const orders = [{
  marketId: '0x...',
  subaccountId: '0x...',
  orderHash: '0x...'
 },{
  marketId: '0x...',
  subaccountId: '0x...',
  orderHash: '0x...'
}]

const messages = orders.map((order) =>
  MsgBatchCancelSpotOrders.fromJSON({
    injectiveAddress,
    orders: [
      {
        marketId: order.marketId,
        subaccountId: order.subaccountId,
        orderHash: order.orderHash
      }
    ]
  })
)

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: messages
})

console.log(txHash)
This Message is used to batch cancel spot orders on the chain

​
MsgBatchCancelDerivativeOrders

import { MsgBatchCancelDerivativeOrders, MsgBroadcasterWithPk } from '@injectivelabs/sdk-ts'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj1...'
const orders = [{
  marketId: '0x...',
  subaccountId: '0x...',
  orderHash: '0x...'
  },{
  marketId: '0x...',
  subaccountId: '0x...',
  orderHash: '0x...'
}]

const messages = orders.map((order) =>
  MsgBatchCancelDerivativeOrders.fromJSON({
    injectiveAddress,
    orders: [
      {
        marketId: order.marketId,
        subaccountId: order.subaccountId,
        orderHash: order.orderHash
      }
    ]
  })
)

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: messages
})

console.log(txHash)

​
MsgRewardsOptOut

This Message is used to opt out of the Trade & Earn program. 
import {
  MsgRewardsOptOut,
  MsgBroadcasterWithPk,
} from '@injectivelabs/sdk-ts'
import { Network } from '@injectivelabs/networks'

const privateKey = '0x...'
const injectiveAddress = 'inj...'

const msg = MsgRewardsOptOut.fromJSON(
 { sender: injectiveAddress })

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Testnet
}).broadcast({
  msgs: msg
})

console.log(txHash)

​
MsgExternalTransfer

This message is used to transfer balance from one subaccount to another subaccount. Note:
  • You cannot transfer from your default subaccountId since that balance is now associated with your Injective address in the bank module. Therefore, in order for MsgExternalTransfer to work, you will need to transfer from a non-default subaccountId.
How to find the subaccountId that you will be transferring from: How to use funds that are currently associated with your Injective Address in bank module:
  • If you have existing non-default subaccounts, you’ll want to do a MsgDeposit to one of your existing non-default subaccountIds and use that subaccountId as the srcSubaccountId below.
  • If you don’t have existing non-default subaccounts, you can do a MsgDeposit to a new default subaccountId, which would be done via importing getSubaccountId from sdk-ts and setting the subaccountId field in MsgDeposit to getSubaccountId(injectiveAddress, 1).
import {
  DenomClient,
  MsgExternalTransfer,
  MsgBroadcasterWithPk,
} from '@injectivelabs/sdk-ts'
import { BigNumberInBase } from '@injectivelabs/utils'
import { Network } from '@injectivelabs/networks'

const denomClient = new DenomClient(Network.Testnet)

const injectiveAddress = 'inj...'
const srcSubaccountId = '0x...'
const dstSubaccountId = `0x...`
const INJ_TOKEN_SYMBOL = 'INJ'
const tokenMeta = denomClient.getTokenMetaDataBySymbol(INJ_TOKEN_SYMBOL)
const tokenDenom = `inj`

/* format amount to add to the burn auction pool */
const amount = {
  denom: tokenDenom,
  amount: new BigNumberInBase(1).toWei(tokenMeta.decimals).toFixed(),
}

/* create message in proto format */
const msg = MsgExternalTransfer.fromJSON({
  amount,
  dstSubaccountId,
  srcSubaccountId,
  injectiveAddress,
})

const privateKey = '0x...'

/* broadcast transaction */
const txHash = await new MsgBroadcasterWithPk({
  network: Network.Testnet,
  privateKey,
}).broadcast({
  msgs: msg
})

console.log(txHash)