Signatures

TypeScript. Light signatures in TypeScript can be created using the @airswap/utils package.
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import { UnsignedLightOrder } from '@airswap/types'
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import { createLightOrder, createLightSignature } from '@airswap/utils'
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​
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const order = createLightOrder({
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  nonce: string,
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  expiry: string,
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  signerWallet: string,
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  signerToken: string,
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  signerAmount: string,
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  signerFee: string,
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  senderWallet: string,
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  senderToken: string,
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  senderAmount: string,
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})
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​
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const { v, r, s } = createLightSignature(
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  order: UnsignedLightOrder,
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  privateKey: string,
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  swapContract: string,
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  chainId: string,
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)
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Python. Light signatures in Python can be created using the py_eth_sig_utils package.
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from py_eth_sig_utils.signing import *
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​
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SIGNER_KEY = "0000000000000000000000000000000000000000000000000000000000000000"
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SWAP_CONTRACT = "0x0000000000000000000000000000000000000000"
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​
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DOMAIN = "SWAP_LIGHT"
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VERSION = "3"
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CHAIN_ID = 1
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​
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order = {
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  "nonce": 0,
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  "expiry": 0,
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  "signerWallet": "0x0000000000000000000000000000000000000000",
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  "signerToken": "0x0000000000000000000000000000000000000000",
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  "signerAmount": 0,
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  "signerFee": 0,
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  "senderWallet": "0x0000000000000000000000000000000000000000",
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  "senderToken": "0x0000000000000000000000000000000000000000",
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  "senderAmount": 0
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}
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​
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data = {
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  "types": {
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    "EIP712Domain": [
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      { "name": "name", "type": "string" },
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      { "name": "version", "type": "string" },
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      { "name": "chainId", "type": "uint256" },
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      { "name": "verifyingContract", "type": "address" },
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    ],
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    "LightOrder": [
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      { "name": "nonce", "type": "uint256" },
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      { "name": "expiry", "type": "uint256" },
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      { "name": "signerWallet", "type": "address" },
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      { "name": "signerToken", "type": "address" },
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      { "name": "signerAmount", "type": "uint256" },
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      { "name": "signerFee", "type": "uint256" },
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      { "name": "senderWallet", "type": "address" },
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      { "name": "senderToken", "type": "address" },
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      { "name": "senderAmount", "type": "uint256" },
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    ]
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  },
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  "domain": {
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    "name": DOMAIN,
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    "version": VERSION,
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    "chainId": CHAIN_ID,
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    "verifyingContract": SWAP_CONTRACT,
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  },
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  "primaryType": "LightOrder",
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  "message": order,
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}
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​
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v, r, s = sign_typed_data(data, bytes.fromhex(SIGNER_KEY))
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Authorized Signers
Optional. One account may authorize another account to sign orders on its behalf. For example, a server might sign using an account that has been authorized by a contract wallet. To manage signer authorizations, use the following functions on the Light contract.
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function authorize(address signer) external
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function revoke() external
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EIP712
The following values are used for the EIP712Domain.
Param
Type
Value
name
bytes32
SWAP_LIGHT
version
bytes32
3
chainId
uint256
Ethereum Mainnet: 1, Rinkeby: 4
verifyingContract
address
​Light contract address

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Authorized Signers

EIP712