@velora-dex/sdk/src/methods/delta/helpers/buildExternalOrderData.ts

Velora SDK

import { Domain } from '../../common/orders/buildOrderData';
import { ExternalDeltaOrder } from './types';

const EXTERNAL_ORDER_EIP_712_TYPES = {
  ExternalOrder: [
    { name: 'owner', type: 'address' },
    { name: 'handler', type: 'address' },
    { name: 'srcToken', type: 'address' },
    { name: 'destToken', type: 'address' },
    { name: 'srcAmount', type: 'uint256' },
    { name: 'destAmount', type: 'uint256' },
    { name: 'expectedAmount', type: 'uint256' },
    { name: 'deadline', type: 'uint256' },
    { name: 'kind', type: 'uint8' },
    { name: 'nonce', type: 'uint256' },
    { name: 'partnerAndFee', type: 'uint256' },
    { name: 'permit', type: 'bytes' },
    { name: 'metadata', type: 'bytes' },
    { name: 'data', type: 'bytes' },
  ],
};

export type SignableExternalOrderData = {
  types: {
    ExternalOrder: typeof EXTERNAL_ORDER_EIP_712_TYPES.ExternalOrder;
  };
  domain: Domain;
  data: ExternalDeltaOrder;
};

type SignExternalOrderInput = {
  orderInput: ExternalDeltaOrder;
  paraswapDeltaAddress: string;
  chainId: number;
};

export function produceExternalOrderTypedData({
  orderInput,
  chainId,
  paraswapDeltaAddress,
}: SignExternalOrderInput): SignableExternalOrderData {
  return {
    types: {
      ExternalOrder: EXTERNAL_ORDER_EIP_712_TYPES.ExternalOrder,
    },
    domain: {
      name: 'Portikus',
      version: '2.0.0',
      chainId,
      verifyingContract: paraswapDeltaAddress,
    },
    data: orderInput,
  };
}