Token swap Sell A for B at Uniswap

swap.js

// 1. Sell A for B at Uniswap
const uAtoB = await uFetcher.fetchPairData(
    tokenFetchers[i][1],
    tokenFetchers[i][0]
);
const route1 = await new uRoute([uAtoB], tokenFetchers[i][0]);
const trade1 = await new uTrade(
    route1,
    new uTokenAmount(tokenFetchers[i][0], amount0),
    uTradeType.EXACT_INPUT
);
const rate1 = await trade1.executionPrice.toSignificant(6);
console.log(`Putting ${unit0} ${tokenPairs[i][0]} into Uniswap pool`);
console.log(`Sell ${tokenPairs[i][0]} for ${tokenPairs[i][1]} at Uniswap: ${rate1 * unit0}`);