Paraswap Docs
Search…
Data Structure in our centralized system
This page explain the data structure of our centralized service handling limit orders. It's adding some features like:
  • tracking maker balance and allowance for ERC20 tokens.
  • tracking state of orders .
    • Fulfillment.
    • Cancellation.
    • Expiration.
    • Partially fulfillment.
This doc follow:

{
"expiry": 0,
"createdAt": 1661165141,
"updatedAt": 1661165141,
"transactionHash": null,
"chainId": 137,
"nonceAndMeta": "7433034152904838547212883274543254857465784035140417181410394112",
"maker": "0x05182e579fdfcf69e4390c3411d8fea1fb6467cf",
"taker": "0xdef171fe48cf0115b1d80b88dc8eab59176fee57",
"takerFromMeta": "0x0000000000000000000000000000000000000000",
"makerAsset": "0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270",
"takerAsset": "0x8f3cf7ad23cd3cadbd9735aff958023239c6a063",
"makerAmount": "10000000000000000",
"fillableBalance": "10000000000000000",
"swappableBalance": "10000000000000000",
"makerBalance": "10000000000000000",
"takerAmount": "7775870000000000",
"signature": "0x43dd8dbc8228594171d0ed3e633ca0eb5c24f46bf0575100623ae56723712f807ecaf7dc8edfcf0d4517f80f11bf016bde0a9a20e243eea2bb32e55eadbb6b0d1b",
"orderHash": "0xdef400fd95d028d8caaba2c4887d2694563e0bc7f73c17d747feac2e24ed411d",
"permitMakerAsset": null,
"type": "LIMIT",
"state": "PENDING"
}

  • nonceAndMeta: In our centralized system we force nonce and meta to be constructed from an address plus a random integer between 0 and 2 ^ 53 - 1 shifted 160 bits. The address that we pack is the actual taker address. (The address that swap takerAsset to maketAsset)
nonceAndMeta = address + (randInt(0, 2 ^ 53 - 1) << 160)
  • takerFromMeta: is the decoded taker from nonceAndMeta. In Augustus contract we check the actual takerAddress (The address who swap takerAsset to makerAsset) by extracting it's value from nonceAndMeta.
  • fillableBalance: is the amount that remains to be filled can be used to check if the amount is partially filled. (fillableBalancemakeAmount)
  • swappableBalance: is the actual amount that can be filled at this time.
  • makerBalance: max amount makerAddress can fill the limit order.
  • orderHash: hash of the on chain Data structure.
  • permitMakerAsset: always null for now will be used to store permit.
  • type: P2P / LIMIT differenciate p2p from normal orders
    • P2P: has takerFromMeta set to some specific address.
    • LIMIT: has takerFromMeta set to 0x....0.
  • state: PENDING / FULFILLED / EXPIRED / CANCELLED.
    • PENDING: order is still usable.
    • FULFILLED: order is fully fulfilled.
    • EXPIRED: order is expired.
    • CANCELLED: order is cancelled.

{
"expiry": 1664716033,
"createdAt": 1663853026,
"transactionHash": null,
"chainId": 137,
"nonceAndMeta": "6696393496368457207383969069655254624825140823245405670718046208",
"maker": "0x05182e579fdfcf69e4390c3411d8fea1fb6467cf",
"taker": "0x0000000000000000000000000000000000000000",
"takerFromMeta": "0x0000000000000000000000000000000000000000",
"makerAsset": "0xcd494673999194365033d7a287af9f0a3b163874",
"makerAssetId": "1027",
"makerAssetType": 2,
"takerAsset": "0xad6d458402f60fd3bd25163575031acdce07538d",
"takerAssetId": "0",
"takerAssetType": 0,
"makerAmount": "1",
"fillableBalance": "1",
"takerAmount": "50",
"signature": "0x762dd1eb9447d10a24adff2c16dd2a6a4f6abdeff2e51fc1df0428129e4b7c1a00100a35f936e591956a5c86d3d502ecb591134bc8c0f32f12fd7533c199975e1c",
"orderHash": "0xe40182a75563c4c84e2ff4f2b4b44045fc94f66c929780ee82560d30cbadeb83",
"permitMakerAsset": null,
"type": "LIMIT",
"state": "PENDING"
}

  • makerAsset: is the decoded address of the makerAsset from our limit order contract.
  • makerAssetId: is the decoded token type from the makerAsset from our limit order contract.
  • takerAsset: is the decoded address of the makerAsset from our limit order contract.
  • takerAssetId: is the decoded token type from the takerAsset from our limit order contract.
  • takerFromMeta: is the decoded taker from nonceAndMeta. In Augustus contract we check the actual takerAddress (The address who swap takerAsset to makerAsset) by extracting it's value from nonceAndMeta.
  • fillableBalance: is the amount that remains to be filled can be used to check if the amount is partially filled. (fillableBalancemakeAmount)
  • orderHash: hash of the on chain Data structure.
  • permitMakerAsset: always null for now will be used to store permit.
  • type: P2P / LIMIT differenciate p2p from normal orders
    • P2P: has takerFromMeta set to some specific address.
    • LIMIT: has takerFromMeta set to 0x....0.
  • state: PENDING / FULFILLED / EXPIRED / CANCELLED.
    • PENDING: order is still usable.
    • FULFILLED: order is fully fulfilled.
    • EXPIRED: order is expired.
    • CANCELLED: order is cancelled.
Export as PDF
Copy link
On this page
ERC20: Order structure
Diff with on chain limit order
NFT ERC 20/721/1155 Order structure