Features Available

1. Find router

Func client.findRouters()

Aggregator Client v2 (v0.x.x) vs v3 (v1.x.x) Compatibility:

• Input: The findRouterInput parameter structure is identical for both versions

• Output Changes: v3 replaces the router field with paths

• Optimization: v3 consolidates duplicate pools in the response, resulting in significant gas savings for multi-path routes

Params

Required parameters

Name	Type	Details
from	String	The coin type of input coin.
target	String	The coin type of output coin.
amount	BN | string | number| bigint	The amount of input or output,determined byAmountIn
byAmountIn	Boolean	true means fixed the amount of input, false means fixed the amount of output.

Optional parameters

In principle, we do not recommend adding these optimal parameters if you don't have any specific custon needs, because our aggregator service will automatically optimize these settings in each SDK update to pursue optimal pricing and performance of transactions.

Name	Type	Details
providers	String Array	Optional list of liquidity providers to include when finding routes. If omitted, the Aggregator automatically selects all providers supported by the current SDK version. Use getAllProviders(), getProvidersIncluding(), or getProvidersExcluding() to construct this list. Refer to Getting Started for the provider list supported by each SDK version.
depth	Number	now depths support betweent 1 and 3, default setting is 3, it means you can get 3 hops path.
splitAlgorithm	String	devide_equally or geometric, recommand just use default devide_equally.
splitFactor	Number	used to contral geometric split width.
splitCount	Number	this field represents the maximum number of splits for a transaction. If you do not want to split, set it to 1. The default value is 20.

ResponseV3

When using Aggregator SDK v3 (version 1.0.0 or higher), the findRouter method will return data in the RouterV3 structure.

Name	Type	Details
quoteID	string	A randomly generated ID from the aggregator service for tracking index transactions and quotes.
amountIn	BN	Total amount in.
amountOut	BN	Total amount out.
byAmountIn	Boolean	true means fixed the amount of input, false means fixed the amount of output. This is the same as request parameters.
paths	Path[]	All liquidity paths data.
insufficientLiquidity	Boolean	true means liquidity insufficient, false means liquidity enough.
deviationRatio	Number	Price deviation ratio, (0.01 means 1%), indicating the degree of difference between the aggregator result and market price. When the price deviation ratio is undefined (no reference market price available) or relatively large (significant deviation from existing market prices), provide users with a reference option on whether to execute the trade at the current price to avoid potential asset losses.
packages	Map<string, string>	When user pass new version parameters, it will return newest aggregator packages data.
overlayFee	Number	The amount for overlay fee.
totalDeepFee	Number	Calculated need deep fee for deep pools.
error	RouterError	Error code and msg for aggregator.

ResponseV2

Name	Type	Details
quoteID	string	A randomly generated ID from the aggregator service for tracking index transactions and quotes.
amountIn	BN	Total amount in.
amountOut	BN	Total amount out.
byAmountIn	Boolean	true means fixed the amount of input, false means fixed the amount of output. This is the same as request parameters.
routes	Router[]	All liquidity routes data.
insufficientLiquidity	Boolean	true means liquidity insufficient, false means liquidity enough.
deviationRatio	Number	Price deviation ratio, (0.01 means 1%), indicating the degree of difference between the aggregator result and market price. When the price deviation ratio is undefined (no reference market price available) or relatively large (significant deviation from existing market prices), provide users with a reference option on whether to execute the trade at the current price to avoid potential asset losses.
packages	Map<string, string>	When user pass new version parameters, it will return newest aggregator packages data.
overlayFee	Number	The amount for overlay fee.
totalDeepFee	Number	Calculated need deep fee for deep pools.
error	RouterError	Error code and msg for aggregator.

Example

import { AggregatorClient, getAllProviders } from "@cetusprotocol/aggregator-sdk"
import BN from "bn.js"

const client = new AggregatorClient({})

const amount = new BN(1000000)
const from = "0x2::sui::SUI"
const target = "0x06864a6f921804860930db6ddbe2e16acdf8504495ea7481637a1c8b9a8fe54b::cetus::CETUS"
const providers = getAllProviders()

const router = await client.findRouters({
  from,
  target,
  amount,
  byAmountIn: true, // `true` means fix input amount, `false` means fix output amount
  providers
})

2. Build swap transaction

Comparison of Swap Methods

Feature	fastRouterSwap	routerSwapWithMaxAmountIn	routerSwap
Input Coin	Prepared automatically	Provided by caller	Provided by caller
Input Limit	Managed automatically	Enforced by maxAmountIn	No explicit limit
Output	Delivered automatically	Returns target coin object	Returns target coin object
Recommended Use	Best for simple swaps where the SDK manages input coin construction automatically through coinWithBalance.	Best for composable PTBs requiring external input coins with a maximum input protection.	Best for composable PTBs where the full input coin balance should be used in the swap.

2.1 Build fast swap transaction

Automatically prepares the input coin, builds the swap, and delivers the output coin to the transaction sender.

BuildFastRouterSwapParamsV3

Required Params

Name	Type	Details
router	RouterDataV3 Object	returned by find router method in latest aggregator sdk version
slippage	Number	A decimal value in the range 0 <= slippage < 1. For example, 0.01 allows up to 1% slippage during swap execution.
txb	Transaction	The programmable transaction builder.

Optional parameters

Name	Type	Details
partner	String	The partner address. Details about partner can be found here. You can now set the partner directly during client initialization. This parameter will soon be deprecated; please migrate your configuration.
cetusDlmmPartner	String	The partner address. Details about partner can be found here. You can now set the partner directly during client initialization. This parameter will soon be deprecated; please migrate your configuration.
refreshAllCoins	Boolean	If true, retrieves all coin types when setting up the swap; if false, uses the existing coins.
payDeepFeeAmount	Number	The deep amount for pay deep fee in deepbookv3 path. Currently, all pools that charge a swap fee are covered by Cetus.
sponsored	Boolean	Set to true when a separate sponsor or gas station pays the transaction gas. In sponsored mode, the swap does not use txb.gas as its input or output. Default: false.

Sponsored transactions

Set sponsored: true when a separate sponsor or gas station pays the transaction gas. In this mode, the swap does not use txb.gas as its input or output because the gas coin belongs to the sponsor.

For the complete flow—including buildTransactionKind, attaching the sponsor's gas data, and collecting signatures from both parties—see Sponsored transaction: sponsor pays gas.

Example

import { AggregatorClient } from "@cetusprotocol/aggregator-sdk"
import { Transaction } from '@mysten/sui/transactions';

const client = new AggregatorClient({})

const amount = new BN(1000000000)
const from = "0x2::sui::SUI"
const target = "0x06864a6f921804860930db6ddbe2e16acdf8504495ea7481637a1c8b9a8fe54b::cetus::CETUS"

const router = await client.findRouters({
  from,
  target,
  amount,
  byAmountIn: true, // `true` means fix input amount, `false` means fix output amount
})

const txb = new Transaction()

await client.fastRouterSwap({
  router,
  txb,
  slippage: 0.01,
})

2.2. Build a swap with maximum input validation

Builds a swap using a caller-provided input coin, validates it against maxAmountIn, and returns the target coin object for use in the same PTB.

Use routerSwapWithMaxAmountIn when the output coin needs to be reused in the same PTB and the provided input coin must be validated against an explicit maximum amount.

BuildRouterSwapParamsV3 (with maxAmountIn)

Extension of BuildRouterSwapParamsV3 with additional maximum amount validation.

Required Params

Name	Type	Details
router	RouterDataV3 Object	Returned by findRouters method. Must include the packages field with aggregator v3 package address.
inputCoin	TransactionObjectArgument	The input coin object to be swapped.Important: Unlike routerSwap, this methods comes with a maxAmountIn input and the final executed amount won't exceed this cap
slippage	Number	A decimal value in the range 0 <= slippage < 1. For example, 0.01 allows up to 1% slippage during swap execution.
txb	Transaction	The programmable transaction builder.
maxAmountIn	BN	The maximum allowed amount of the provided input coin. The transaction aborts if the input coin amount exceeds this value.

Optional Parameters

Name	Type	Details
partner	String	The partner address. Details about partner can be found here.You can now set the partner directly during client initialization. This parameter will soon be deprecated; please migrate your configuration.
deepbookv3DeepFee	TransactionObjectArgument	The DEEP token object for paying fees in DeepBook V3 pools. Currently, all pools that charge a swap fee are covered by Cetus, so you typically don't need to provide this.
fixable	Boolean	Advanced parameter for fixable router swap. Used in special swap scenarios. Default: false

Examples

import { AggregatorClient } from "@cetusprotocol/aggregator-sdk"
import { Transaction } from "@mysten/sui/transactions"
import BN from "bn.js"

const client = new AggregatorClient({})
const txb = new Transaction()

// Find the best route
const routers = await client.findRouters({
  from: "0x2::sui::SUI",
  target: "0x06864a6f921804860930db6ddbe2e16acdf8504495ea7481637a1c8b9a8fe54b::cetus::CETUS",
  amount: new BN(1000000), // 1 SUI
  byAmountIn: true,
})

// Your input coin (could be from wallet or created in PTB)
const inputCoin = txb.object("0x...")

// Execute swap with maximum amount protection
const targetCoin = await client.routerSwapWithMaxAmountIn({
  router: routers,
  txb,
  inputCoin,
  slippage: 0.01, // 1% slippage
  maxAmountIn: new BN(1500000), // Maximum 1.5 SUI allowed
})

// The transaction aborts if inputCoin exceeds maxAmountIn.
txb.transferObjects([targetCoin], yourAddress)

2.3. Build swap transaction and return target coin object(use the whole input coin)

Uses a caller-provided input coin and returns the target coin object for use in the same PTB.

⚠️ Critical Difference: inputCoin Behavior

routerSwap - Full Consumption

// This method will consume the ENTIRE inputCoin provided
// The whole coin will be used in the swap - there is NO partial usage
const targetCoin = await client.routerSwap({
  router: routers,
  txb,
  inputCoin,  // ⚠️ This ENTIRE coin will be consumed
  slippage: 0.01,
})

Important: If you provide a coin with 1000 SUI, the entire 1000 SUI will be used in the swap, regardless of the router's amountIn. This method does not support partial coin usage.

routerSwapWithMaxAmountIn - Protected Consumption

// This method validates the amount and can work with dynamic balances
const targetCoin = await client.routerSwapWithMaxAmountIn({
  router: routers,
  txb,
  inputCoin,  // ✅ Only the required amount will be used
  slippage: 0.01,
  maxAmountIn: new BN(2000000000), // Hard limit: max 2 SUI
})

Important: This method adds on-chain validation to ensure the swap does not exceed maxAmountIn. The transaction will abort if the required amount exceeds this limit, protecting your assets from unexpected large swaps.

slippage and maxAmountIn provide different protections. slippage limits deterioration of the execution rate relative to the quote. maxAmountIn sets an absolute upper bound on the input coin amount. When either validation fails, the transaction aborts on-chain.

BuildRouterSwapParamsV3

Required Params

Name	Type	Details
router	RouterData Object	Returned by find router method
inputCoin	TransactionObjectArgument	The input coin object to be swapped. Important: This method will completely consume the input coin amount. If you need to set a maximum limit on how much of the input coin can be used (for example, to implement slippage protection on the input side), you should use routerSwapWithMaxAmountIn method.
slippage	Number	A decimal value in the range 0 <= slippage < 1. For example, 0.01 allows up to 1% slippage during swap execution.
txb	Transaction	The programmable transaction builder.

Optional parameters

Name	Type	Details
partner	String	The partner address. Details about partner can be found here. You can now set the partner directly during client initialization. This parameter will soon be deprecated; please migrate your configuration.
deepbookv3DeepFee	TransactionObjectArgument	The deep fee obejct argument for pay deep fee in deepbookv3 path. Currently, all pools that charge a swap fee are covered by Cetus.

Example

import { AggregatorClient } from "@cetusprotocol/aggregator-sdk"
import { Transaction } from '@mysten/sui/transactions';

const client = new AggregatorClient({})

const amount = new BN(1000000)
const from = "0x2::sui::SUI"
const target = "0x06864a6f921804860930db6ddbe2e16acdf8504495ea7481637a1c8b9a8fe54b::cetus::CETUS"

const router = await client.findRouters({
  from,
  target,
  amount,
  byAmountIn: true, // `true` means fix input amount, `false` means fix output amount
})

const txb = new Transaction()

const targetCoin = await client.routerSwap({
  router,
  txb,
  inputCoin, // the whole coin will be used in the swap.
  slippage: 0.01,
})

// you can use this target coin object argument to build your ptb.
client.transferOrDestoryCoin(
    txb,
    targetCoin,
    target
)

3. FAQ

5.1. Why use v3 swap params?

1. Automatically merges duplicate paths

By combining the latest path merging and sorting algorithms, duplicate pools are consolidated, resulting in significant gas savings when dealing with multiple split paths.

2. Support dynamic use latest package version

The new parameters will pass the entire result from find router, which includes the latest contract address. However, this feature is only effective in SDK versions greater than 0.3.18.

In the future, we will continue to support the old version of swap parameters in both swap methods. However, upgrading to the new version will allow you to avoid mandatory SDK version updates.

3. Remove duplicate parameter byAmountIn

Now, the find router result will return the value based on the amount in, allowing you to directly obtain it from the find router result in the new swap parameters.

5.2. How to Migrate to Aggregator V3？

No code changes needed for basic usage:

• Use the latest sdk version. (version >= v1.1.1)

• Client initialization stays the same

• findRouter now returns V3 structure automatically

• fastRouterSwap and routerSwap accept the new format transparently

• Update display logic only if showing detailed RouterDataV3 to users

5.3. How to set providers?

1. You can ignore the providers parameters; the aggregator server will automatically set all usable providers based on the SDK version.

2. You can use the getAllProviders() method to retrieve all providers. Additionally, you can use the getProvidersIncluding() and getProvidersExcluding() methods to filter out specific providers or select only certain ones from the complete list.

import { getAllProviders, getProvidersExcluding } from "@cetusprotocol/aggregator-sdk"
const allProviders = getAllProviders()
console.log(allProviders)
[
      'CETUS',         'KRIYA',
      ...
      'MOMENTUM',      'STEAMM_OMM',
      'STEAMM_OMM_V2'
]
    
const providersExcept = getProvidersExcluding(["CETUS"])
console.log(providersExcept)
[
      'KRIYA',      'FLOWX',
      ...
      'STEAMM_OMM', 'STEAMM_OMM_V2'
]

1. While you can manually specify the providers you want to use, as the number of providers increases, manual configuration may lead to the omission of some providers, which could affect your price advantage."

5.4. How to fix error "All Pyth price nodes are unavailable. Cannot fetch price data. Please switch to or add new available Pyth nodes. Detailed error: aborted"？

Reason: Some providers, such as Headalpmm and Metastable, rely on Pyth oracle prices when building transactions. Currently, we have a default configuration that connects to Pyth's publicly available node. However, if you frequently build transactions, you may encounter limitations with the Pyth public nodes(https://hermes.pyth.network).

Solutions: We recommend setting up a private Pyth node interface as an additional backup. This will ensure uninterrupted access to SteammOmmV2 and Metastable, even if the public node experiences occasional downtime.

const client = new AggregatorClient({
  // endpoint, // If you do not have a exclusive aggregator api domain，just use cetus default aggregator endpoints.
  signer: wallet,
  client: suiClient,
  env: Env.Mainnet,
  pythUrls: ["YOUR_PYTH_URL", "ANOTHER_PYTH_URL"], // Optional. Custom Pyth price feed URLs. Defaults to null (uses built-in endpoints).
  partner?: "YOUR_CETUS_CLMM_PARTNER_ID", // Optional. Partner ID for CLMM fee sharing. Set once during initialization instead of per swap. Defaults to null (no fee sharing).
  cetusDlmmPartner?: "YOUR_CETUS_DLMM_PARTNER_ID", // Optional. Partner ID for DLMM fee sharing. Defaults to null (no fee sharing).
  overlayFeeRate?: 0.01, // Optional. Overlay fee rate (0.01 represents 1%). Defaults to 0 (no overlay fee).
  overlayFeeReceiver?: "0x..", // Optional. Address to receive the overlay fees. Defaults to null. Required if overlayFeeRate is set.
})

Another way, you can opt not to use Headalpmm and Metastable, but this will require you to manually configure the provider when find router.

const providers = getProvidersExcluding([
  "HAEDALPMM",
  "METASTABLE",
  "STEAMM_OMM_V2",
  "HAEDALHMMV2",
])

const router = await client.findRouters({
  from,
  target,
  amount,
  byAmountIn: true,
  providers
})