Invalid Dfyn swap route on Polygon

[xykota]

This route is proposed by Paraswap:

[
  {
    percent: 64,
    swaps: [
      {
        srcToken: '0xc2132d05d31c914a87c6611c10748aeb04b58e8f',
        srcDecimals: 6,
        destToken: '0x2791bca1f2de4661ed88a30c99a7a9449aa84174',
        destDecimals: 6,
        swapExchanges: [
          {
            exchange: 'QuickSwapV3',
            srcAmount: '22397446',
            destAmount: '22404106',
            percent: 100,
            poolAddresses: [ '0x7b925e617aefd7fb3a93abe3a701135d7a1ba710' ],
            data: {
              path: [
                {
                  tokenIn: '0xc2132d05d31c914a87c6611c10748aeb04b58e8f',
                  tokenOut: '0x2791bca1f2de4661ed88a30c99a7a9449aa84174'
                }
              ],
              gasUSD: '0.003357'
            }
          }
        ]
      }
    ]
  },
  {
    percent: 36,
    swaps: [
      {
        srcToken: '0xc2132d05d31c914a87c6611c10748aeb04b58e8f',
        srcDecimals: 6,
        destToken: '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
        destDecimals: 18,
        swapExchanges: [
          {
            exchange: 'Dfyn',
            srcAmount: '12598564',
            destAmount: '17170688310077781158',
            percent: 100,
            poolAddresses: [ '0x9045b1762a0bc4BadD08eE7B1A55c3871DE9B7b4' ],
            data: {
              router: '0xf3938337F7294fEf84e9B2c6D548A93F956Cc281',
              path: [
                '0xc2132d05d31c914a87c6611c10748aeb04b58e8f',
                '0x4c28f48448720e9000907bc2611f73022fdce1fa'
              ],
              factory: '0xE7Fb3e833eFE5F9c441105EB65Ef8b261266423B',
              initCode: '0xf187ed688403aa4f7acfada758d8d53698753b998a3071b06f1b777f4330eaf3',
              feeFactor: 10000,
              pools: [
                {
                  address: '0x9045b1762a0bc4BadD08eE7B1A55c3871DE9B7b4',
                  fee: 30,
                  direction: false
                }
              ],
              weth: '0x4c28f48448720e9000907bc2611f73022fdce1fa',
              gasUSD: '0.002772'
            }
          }
        ]
      },
      {
        srcToken: '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
        srcDecimals: 18,
        destToken: '0x2791bca1f2de4661ed88a30c99a7a9449aa84174',
        destDecimals: 6,
        swapExchanges: [
          {
            exchange: 'QuickSwapV3',
            srcAmount: '17170688310077781158',
            destAmount: '12615940',
            percent: 100,
            poolAddresses: [ '0xae81fac689a1b4b1e06e7ef4a2ab4cd8ac0a087d' ],
            data: {
              path: [
                {
                  tokenIn: '0x0d500b1d8e8ef31e21c99d1db9a6444d3adf1270',
                  tokenOut: '0x2791bca1f2de4661ed88a30c99a7a9449aa84174'
                }
              ],
              gasUSD: '0.003357'
            }
          }
        ]
      }
    ]
  }
]

Notice the second 36% part suggests:

• USDT to WETH (Dfyn, 0x4c28f4) on Dfyn
• WMATIC (0xeee) to USDC.e on Quickswap V3

I suspect there is some confusion in how Dfyn is treating 0xeee as its own WETH in

paraswap-dex-lib/src/dex/uniswap-v2/dfyn.ts

Lines 53 to 87 in 2293ffa

	getPoolIdentifiers(
	from: Token,
	to: Token,
	side: SwapSide,
	blockNumber: number,
	): Promise<string[]> {
	const _from = WrapDfynWETH(from);
	const _to = WrapDfynWETH(to);
	return super.getPoolIdentifiers(_from, _to, side, blockNumber);
	}
	async getPricesVolume(
	from: Token,
	to: Token,
	amounts: bigint[],
	side: SwapSide,
	blockNumber: number,
	limitPools?: string[],
	): Promise<ExchangePrices<UniswapV2Data> | null> {
	const _from = WrapDfynWETH(from);
	const _to = WrapDfynWETH(to);
	const prices = await super.getPricesVolume(
	_from,
	_to,
	amounts,
	side,
	blockNumber,
	limitPools,
	);
	return prices
	? prices.map(p => ({ ...p, data: { ...p.data, weth: DfynWETH.address } }))
	: null;
	}
	}