Limit Order Structure
Here is a complete list of the parameters of a limit order and the corresponding type. This is the object that a user signs to validate its order
- Sell Token: the address of the token that is sold
- Buy Token: the address of the token that is bought
- Sell Amount: the amount of
sellTokenthat is sold in wei - Buy Amount: the amount of
buyTokenthat is bought in wei - Receiver: the address that will receive the proceedings of the trade. If this field is zero (the zero address
0x00...0), then the user who signed the trade is going to receive the funds - Valid To: the timestamp (in seconds) until which the order is valid
- App Data: extra information about the order. It is ignored by the smart contract outside of signature verification, but may be used offchain for information on the order's origin or for referrals
- Fee Amount: the amount of fees paid in
sellTokenwei. In the case for Limit Orders this field will always be0. - Kind: either
sellorbuy - Partially Fillable: whether the order is partially fillable or fill-or-kill. (For the moment this is always FALSE as its not enabled yet)
- Sell Token Balance: from where the sell token balance is withdrawn. It can be
erc20(directly from the user's ERC-20 balance),external(from the user's ERC-20 balancer through Balancer's vault), orinternal(from the user's Balancer internal balance) - Buy Token Balance: to where the buy token is deposited. It can be
erc20(directly to the user's ERC-20 balance) orinternal(to the user's Balancer internal balance) - SigningScheme: The signature scheme to use when signing the order. CoW Protocol allows various signing schemes to support different wallet kinds:
ethsign: Use theeth_signEthereum message signature of the EIP-712 order “struct hash” (this is defined in the EIP linked above).eip1271: Use ERC-1271 signature for the order. The order hash will be the EIP-712 order “struct hash” (defined above)presign: Execute a transaction to the Settlement contract to indicate that an order is signed. This can be use as a fallback solution if no other signing schemes are supported by the trader.
- Signature: The signature bytes. For ECDSA signatures (
eip712andethsign) this just the the signature encoded as 65 bytes:r || s || v. Foreip1271, this is the signature bytes to pass in at signature verification. This is ERC-1271 implementation defined and largely depends on the signing smart contract. Forpresign, this is the empty bytes0x. - From: The Address that submits the order and authorizes the full sellAmount to be traded once executed.
Last modified 3mo ago