AWS Lambda fetching fails?

[francestu96]

I have this simple bot deployed on AWS Lambda.

It has a welcome scene and a wallet scene.
The problem is that the function execution "skip" this line in the wallet scene: const balance = await solanaConn.getBalance(ctx.session.wallet.publicKey);

I don't know what exactly happens but the AWS logs of a wallet scene entering is the following:

START RequestId: 25c88c4c-ec6f-4051-8472-2966190a99ee Version: $LATEST
INFO Getting balance of 7wdeakNFckoMBJKKauvGUf5JBM5SRtNoFVMqExZMJkAM...
END RequestId: 25c88c4c-ec6f-4051-8472-2966190a99ee
REPORT RequestId: 25c88c4c-ec6f-4051-8472-2966190a99ee Duration: 6.33 ms Billed Duration: 7 ms Memory Size: 1024 MB Max Memory Used: 156 MB

It looks like the function execution ends before awaiting the rpc call of getting the balance.
Furthermore, when I use the same line of code inside the welcome scene, it perfectly works!

This is the bot code, thank you in advance:

const {  session, Markup, Scenes, Telegraf } = require('telegraf');
const { Connection, Keypair } = require("@solana/web3.js");
const http = require("serverless-http");
const bs58 = require('bs58');
require('dotenv').config();

const bot = new Telegraf(process.env.BOT_TOKEN);

const solanaConn = new Connection(process.env.SOLANA_HTTPS);
console.log("Connected to Solana: " + process.env.SOLANA_HTTPS);

const welcomeScene = new Scenes.BaseScene("welcome-scene");
welcomeScene.enter(async ctx => {
    if (!ctx.session.wallet){
        ctx.session.wallet = Keypair.generate();
    }

    const balance = await solanaConn.getBalance(ctx.session.wallet.publicKey);
    console.log("Balance of " + ctx.session.wallet.publicKey + ": " + balance)

    return await ctx.replyWithMarkdownV2("🚀 Welcome to SolTradingSniperBot 🤖\nThe solution for Solana Trending\\!\n\nYour wallet: `" + ctx.session.wallet.publicKey.toString() + "`\n\n💰 Balance: " + balance + " SOL\n\nservice fee: " + (process.env.SNIPER_FEE || "0").replace(".", "\\.") + " SOL",
        Markup.inlineKeyboard([
            Markup.button.callback("👛 Wallet", "wallet")
        ])
    );
});
welcomeScene.on("message", async ctx => await ctx.reply("Click on buttons to continue"));

const walletScene = new Scenes.WizardScene("wallet-scene",
    async ctx => {
        await ctx.deleteMessage();
        console.log("Getting balance of " + ctx.session.wallet.publicKey + "...");
        try{
            const balance = await solanaConn.getBalance(ctx.session.wallet.publicKey);
            await ctx.replyWithMarkdownV2("Your wallet: `" + ctx.session.wallet.publicKey.toString() + "`\n\nPrivate key: `" + bs58.encode(ctx.session.wallet.secretKey) + "`\n\n💰 Balance: " + balance + " SOL",
                Markup.inlineKeyboard([
                    Markup.button.callback("❌ Close", "close")
                ])
            );
        }
        catch(error){
            console.log(error);
            await ctx.reply("Sorry we encounter an error...",
                Markup.inlineKeyboard([
                    Markup.button.callback("Retry", "start")
                ])
            );
            return await ctx.scene.enter('welcome-scene');
        }
        console.log("Balance of " + ctx.session.wallet.publicKey + ": " + balance)
    }
);
walletScene.action("close", async ctx => {
    await ctx.deleteMessage();
    ctx.scene.enter('welcome-scene');
});

const stage = new Scenes.Stage([welcomeScene, walletScene]);

bot.use(session());
bot.use(stage.middleware());

bot.command('start', (ctx) => ctx.scene.enter('welcome-scene'));
bot.action('start', (ctx) => ctx.scene.enter('welcome-scene'));
bot.action('wallet', (ctx) => ctx.scene.enter('wallet-scene'));

if(process.env.ENV == "local"){
    bot.launch();
}

if(process.env.ENV == "prod"){
    module.exports = { handler: http(bot.webhookCallback("/SolTrendSniperBot")) };
}

[francestu96]

After a week of googling, tests and blasphemies, still having this problem...
Can it be a wrong promise chain or something related I'm missing?

I cannot solve this problem

[MKRhere]

Sorry for the delayed response. You're just missing an await/return.

await ctx.scene.enter('welcome-scene');

[francestu96]

Thank you for the reply but the Lambda function still continuing ends some requests before
const balance = await solanaConn.getBalance(ctx.session.wallet.publicKey); even awaiting the enter function