OTC Endpoints

The endpoints below allow you to interact with OTC.

Contract Name

• OTCTrade

Mainnet Addresses

Network	Contract Address
Arbitrum	0x597e3CbEA8f34102E0fC59775Ea62EA1dD1f56f8
Base	0xb4F6544fF7A4a586B47F48d06C70bB2e16B5da6f
Bitlayer	0xECB64314e2B7d2e1F997915E1cE4Ce89f3A9e9aa
Ethereum	0x7D75D2A1Fd7F57f3d9b2a47fB3C8A41523d0ba15
Polygon	0x7D75D2A1Fd7F57f3d9b2a47fB3C8A41523d0ba15
BSC	0x7D75D2A1Fd7F57f3d9b2a47fB3C8A41523d0ba15
Berachain Bartio	0xAD387C624bf043F33c913d9403a96b857b133381

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Smart Contract Interface

1. Get the Nonce of the User's Order

Retrieve the nonce of a user's order, required for creating an order.

• Function: nonces(address maker) returns (uint256)

Request Parameter

Parameter Name	Required	Type	Description
maker	Yes	address	Creator Address

Response Parameter

Parameter Name	Type	Description
nonce	uint256	User order nonce

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2. Calculate the Hash of the Order

Calculate the hash of an order, necessary when creating it.

• Function: hashOrder(Order memory order) returns (bytes32)

Request Parameter

Parameter Name	Required	Type	Description
order	Yes	Order	Created order

Response Parameter

Parameter Name	Type	Description
orderHash	bytes32	User order hash

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3. Perform Multi-for-Multi Asset Swap

Use the signed order information to conduct a multi-asset swap.

• Function: swap(Order memory order_)

Request Parameter

Parameter Name	Required	Type	Description
order_	Yes	Order	Order information from centralized interface
value	Yes	uint256	Platform currency to pay as handling fee

Order Structure

Parameter Name	Required	Type	Description
maker	Yes	address	Address of the asset's owner (order signer)
taker	Yes	address	Address of the person specifying the transaction
asset	Yes	Asset[]	Array of swapped assets
currency	Yes	Asset[]	Array of assets being swapped in
deadline	Yes	uint256	Deadline for the order validity period
themselves	Yes	bytes	Signed transaction data

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Asset Structure in Order

Parameter Name	Required	Type	Description
collection	Yes	address	Token address
assetClass	Yes	address	Token type (e.g., ERC20, ERC721)
amountOrID	Yes	uint256	ERC20 quantity or ERC721 ID

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4. Cancel Order

Allows the order creator to cancel an order.

• Function: cancelOrder(Order memory order)

Request Parameter

Parameter Name	Required	Type	Description
order	Yes	Order	Order information from centralized interface

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5. Cancel Multiple Orders

Allows the order creator to cancel multiple orders in one call.

• Function: cancelMultipleOrders(Order[] memory orders)

Request Parameter

Parameter Name	Required	Type	Description
orders	Yes	Order[]	List of order information from centralized interface

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6. Cancel All Orders

Allows the creator to cancel all of their orders.

• Function: cancelAllOrders()

Request Parameters

This function does not take any parameters.

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7. Obtain the Minimum Native Currency Fee

Returns the minimum platform fee charged in native currency.

• Function: feeMinAmount() returns (uint256)

Response Parameter

Parameter Name	Type	Description
feeMinAmount	uint256	Minimum native currency platform fee