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POST
Build batch transaction

Authorizations

Authorization
string
header
required

Send Authorization: <ApiKey>:<ApiSecret> — joined by a colon, raw. No Bearer prefix, no base64.

Get your credentials

Path Parameters

multiId
string
required

The multi exchange group ID

Maximum string length: 64

Body

application/json

Request body for POST /exchanges/multi/{multiId}/tx/build

sender
string
required

Wallet that will sign and fund the transaction(s). On EVM it also owns the smart account the batch runs through, so the same wallet must sign at Submit signed transaction.

Minimum string length: 1
houdiniIds
string[]

Optional subset of orders to build for; defaults to all orders in the group

Maximum array length: 50

Response

Success

multiId
string
required

The group these transactions fund.

chain
string
required

Chain kind of the from token (e.g. "solana", "evm")

transactions
object[]
required

One entry per batch. A group larger than the per-chain batch limit is split across several.

depositNeeded
string

Native coin the smart account still needs before you can submit, in wei. "0" means it is already funded.

saCurrentBalance
string

Native coin the smart account holds right now, in wei. The account is owned by the sender wallet, so this balance stays under the user's control.