Aggregate DEX Swap

post

https://svc.blockdaemon.com/defi/v1/dex/swaps

Aggregates swap quotes from all DEXs supporting a specified token pair. It allows users to customize their query to prioritize either the best output or the lowest gas costs. The response provides detailed transaction data including DEX identifiers, output amounts, swap routing parameters (such as call data), gas estimates, and a reference, enabling traders to compare and select the most efficient swap route for their needs.

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Compute Unit Value: 115 (Fixed)

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Body Params

The request body for a /defi/v1/dex/swaps

chainId

string

enum

The unique ID to direct queries or transactions to the correct blockchain. Find more here.

path

array of strings

required

Ordered array of token contract addresses defining the swap route. Provide [tokenInAddress, tokenOutAddress] for a direct swap. Example (WETH→USDC on Ethereum): ['0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2', '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'].

path*

amountIn

string

required

Amount of the input token to provide, specified in the token's smallest denomination (base units). Do not send human-readable decimal values. Examples: to swap 1 WETH (18 decimals), use "1000000000000000000"; to swap 1 USDC (6 decimals), use "1000000".

chainSymbol

string

The abbreviated chain name for queries or transactions.

from

string

required

Blockchain address of the token sender. For EVM chains, use a checksummed hex address (e.g., 0xABCDEF...). This address must hold sufficient balance of the input token and will sign the transaction.

gas

string

Maximum number of gas units to allocate for the transaction, as an integer string (e.g., '200000'). If omitted, gas is estimated automatically. Note: this is gas units, not wei or gwei.

string

required

Blockchain address of the token recipient. For EVM chains, use a checksummed hex address (e.g., 0xABCDEF...). Output tokens are delivered to this address after the swap.

poolFees

string

Fee tier of the target liquidity pool in basis points (1 bp = 0.01%). Common values for Uniswap V3-style AMMs: 100 (0.01%), 500 (0.05%), 3000 (0.3%), 10000 (1%). If omitted, the pool yielding the highest output amount is selected automatically.

excludedDexes

string

Comma-separated list of DEX protocol IDs (dexId values) to exclude from routing. Find available IDs via the /support endpoint.

bestNetPrice

boolean

If true, sorts prepared transactions by net value (amountsOut minus gas) in descending order. If multiple sort parameters are true, bestNetPrice takes precedence.

bestQuote

boolean

If true, sorts prepared transactions by amountsOut in descending order. If multiple sort parameters are true, bestNetPrice takes precedence.

lowestGas

boolean

If true, sorts prepared transactions by gas cost in ascending order. If multiple sort parameters are true, bestNetPrice takes precedence.

gasPriority

string

Specifies the priority level for gas fees (e.g., 'low', 'medium', or 'high'), which influences the transaction speed and cost.

amountOutMin

string

Minimum acceptable output amount in the token's smallest denomination (base units). Provides slippage protection — the transaction reverts if the output falls below this value. Set to "0" to disable slippage protection. Examples: to require at least 0.99 USDC (6 decimals), use "990000"; to require at least 0.99 WETH (18 decimals), use "990000000000000000".

slippage

string

Maximum acceptable slippage as a percentage of the swap value. Valid range: 0 to 100 (e.g., 1 = up to 1% slippage). Defaults to 1. The transaction reverts if the output deviates more than this percentage from the quoted price.

enableFee

boolean

Flag to include a basis points fee transaction alongside the main transaction when set to true.

batchOption

string

enum

Transaction batching standard to use. Supported values: 'EIP-5792' (wallet-level batching via wallet_sendCalls) or 'EIP-7702' (EOA code delegation via batcherContract). Requires batcherContract when using EIP-7702.

Allowed:

batcherContract

string

The EOA address of the batcher that will be used to execute the transaction when using EIP-7702 batching. If not provided, the default batcher contract for the chain will be used.

simulate

boolean

When true, dry-runs the transaction batch via eth_simulateV1 and returns a simulate field with status and error on each transaction.

Response

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Response

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200Successful response