Fill Order

post

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

Facilitates the execution (“filling”) of an existing limit order on a decentralized exchange by specifying the order ID, taker address, and offered token amount. The endpoint returns transaction data (chain ID, addresses, gas details, etc.) and a reference ID, enabling secure settlement of trades while providing a clear audit trail.

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Compute Unit Value: 25 (Fixed)

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Body Params

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

dexId

string

enum

The unique ID to specify the decentralized exchange (DEX) within a particular blockchain. Find more here.

Allowed:

orderId

array of strings

required

The ID of the limit order to be filled.

orderId*

from

string

required

The wallet address of the Taker that will receive the Maker asset.

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".

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.

gasPriority

string

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

enableFee

boolean

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

Response

200Successful response