Order

Structure of an order. The structure is used:

• when checking an outgoing order by the account script or the verifier function of the dApp script,
• in the InvokeScriptTransaction.

Constructor

Order(id: ByteVector, matcherPublicKey: ByteVector, assetPair: AssetPair, orderType: Buy|Sell, price: Int, amount: Int, timestamp: Int, expiration: Int, matcherFee: Int, matcherFeeAssetId: ByteVector|Unit, sender: Address, senderPublicKey: ByteVector, bodyBytes: ByteVector, proofs: List[ByteVector])

Fields

#	Name	Data type	Description
1	id	ByteVector	ID of an order
2	matcherPublicKey	ByteVector	Public key of a matcher
3	assetPair	AssetPair	Pair of tokens
4	orderType	Buy|Sell	Type of an order — selling or buying
5	price	Int	Price of a token to exchange
6	amount	Int	Number of tokens to exchange
7	timestamp	Int	Unix time (opens new window) of the validation of an order by a matcher
8	expiration	Int	Unix time when an uncompleted order will be cancelled
9	matcherFee	Int	Transaction fee
10	matcherFeeAssetId	ByteVector|Unit	Token of a transaction fee. It can only be WAVES
11	sender	Address	Address of the sender of an order
12	senderPublicKey	ByteVector	Public key of the sender of an order
13	bodyBytes	ByteVector	Array of bytes of an order
14	proofs	List[ByteVector]	Array of proofs

Example

The script below enables buying from a sender's account:

• only the specified asset,
• only at a given price,
• only for WAVES.

{-# STDLIB_VERSION 5 #-}
{-# CONTENT_TYPE EXPRESSION #-}
{-# SCRIPT_TYPE ACCOUNT #-}

let myAssetId = base58'8LLpj6yQLUu37KUt3rVo1S69j2gWMbgbM6qqgt2ac1Vb'

match tx {
   case o: Order =>
        let isWavesPriceAsset = !isDefined(o.assetPair.priceAsset)
        let rightPair = (o.assetPair.amountAsset == myAssetId) && isWavesPriceAsset
        sigVerify(o.bodyBytes, o.proofs[0], o.senderPublicKey)
        && rightPair
        && o.price == 500000
        && o.orderType == Buy
   case _ => false
}