balancer.js

const fs = require('fs');
const { getAddress } = require('ethers/utils');
const subgraphResult = require('./poolTokens.json');
const { mainnet } = require('./deployed.json');
const trustwalletImgs = require('./trustwallet.json');

const tokens = [];
const deployedTokens = mainnet.tokens.map(token => token.address.toLowerCase());
const tokensIds = [];

subgraphResult.data.poolTokens.forEach(token => {
  const { symbol, address, decimals } = token;
  const lcAddress = JSON.parse(JSON.stringify(address));
  lcAddress.toLowerCase();
  if (!deployedTokens.includes(lcAddress) && !tokensIds.includes(lcAddress)) {
    tokensIds.push(lcAddress);
    const iconAddress = trustwalletImgs.includes(getAddress(address)) ? getAddress(address) : 'unknown';
    tokens.push({
      symbol,
      address: getAddress(address),
      decimals,
      iconAddress,
      precision: 2
    });
  }
});

fs.writeFile('./tokens.json', JSON.stringify(tokens, null, 2), (err, result) => {
  console.log(err, result);
});

tokens.forEach(token => {
  console.log(`\n- Add ${token.symbol}`);
  console.log(`https://etherscan.io/address/${token.address}`);
  if (token.iconAddress === 'unknown') {
    console.log('No image');
  } else {
    console.log(`https://raw.githubusercontent.com/trustwallet/assets/master/blockchains/ethereum/assets/${token.address}/logo.png`);
  }
});

tokens.json

[
  {
    "symbol": "TUSD",
    "address": "0x0000000000085d4780B73119b644AE5ecd22b376",
    "decimals": 18,
    "iconAddress": "0x0000000000085d4780B73119b644AE5ecd22b376",
    "precision": 2
  },
  {
    "symbol": "STAC",
    "address": "0x992a780fDEda7a24c52526e027DfEf90CdDc685f",
    "decimals": 18,
    "iconAddress": "unknown",
    "precision": 2
  },
  {
    "symbol": "STA",
    "address": "0xe343245DE92181bc06ba5Cd1152C705A2C5F3E2F",
    "decimals": 18,
    "iconAddress": "unknown",
    "precision": 2
  },
  {
    "symbol": "KNC",
    "address": "0xdd974D5C2e2928deA5F71b9825b8b646686BD200",
    "decimals": 18,
    "iconAddress": "0xdd974D5C2e2928deA5F71b9825b8b646686BD200",
    "precision": 2
  },
  {
    "symbol": "STA",
    "address": "0xa7DE087329BFcda5639247F96140f9DAbe3DeED1",
    "decimals": 18,
    "iconAddress": "0xa7DE087329BFcda5639247F96140f9DAbe3DeED1",
    "precision": 2
  },
  {
    "symbol": "CBIX7",
    "address": "0xCf8f9555D55CE45a3A33a81D6eF99a2a2E71Dee2",
    "decimals": 18,
    "iconAddress": "0xCf8f9555D55CE45a3A33a81D6eF99a2a2E71Dee2",
    "precision": 2
  },
  {
    "symbol": "PARETO",
    "address": "0xea5f88E54d982Cbb0c441cde4E79bC305e5b43Bc",
    "decimals": 18,
    "iconAddress": "0xea5f88E54d982Cbb0c441cde4E79bC305e5b43Bc",
    "precision": 2
  },
  {
    "symbol": "AST",
    "address": "0x27054b13b1B798B345b591a4d22e6562d47eA75a",
    "decimals": 4,
    "iconAddress": "0x27054b13b1B798B345b591a4d22e6562d47eA75a",
    "precision": 2
  },
  {
    "symbol": "CHAI",
    "address": "0x06AF07097C9Eeb7fD685c692751D5C66dB49c215",
    "decimals": 18,
    "iconAddress": "0x06AF07097C9Eeb7fD685c692751D5C66dB49c215",
    "precision": 2
  },
  {
    "symbol": "sUSD",
    "address": "0x57Ab1E02fEE23774580C119740129eAC7081e9D3",
    "decimals": 18,
    "iconAddress": "0x57Ab1E02fEE23774580C119740129eAC7081e9D3",
    "precision": 2
  },
  {
    "symbol": "GEN",
    "address": "0x543Ff227F64Aa17eA132Bf9886cAb5DB55DCAddf",
    "decimals": 18,
    "iconAddress": "0x543Ff227F64Aa17eA132Bf9886cAb5DB55DCAddf",
    "precision": 2
  },
  {
    "symbol": "GNO",
    "address": "0x6810e776880C02933D47DB1b9fc05908e5386b96",
    "decimals": 18,
    "iconAddress": "0x6810e776880C02933D47DB1b9fc05908e5386b96",
    "precision": 2
  },
  {
    "symbol": "DXD",
    "address": "0xa1d65E8fB6e87b60FECCBc582F7f97804B725521",
    "decimals": 18,
    "iconAddress": "0xa1d65E8fB6e87b60FECCBc582F7f97804B725521",
    "precision": 2
  },
  {
    "symbol": "DGX",
    "address": "0x4f3AfEC4E5a3F2A6a1A411DEF7D7dFe50eE057bF",
    "decimals": 9,
    "iconAddress": "0x4f3AfEC4E5a3F2A6a1A411DEF7D7dFe50eE057bF",
    "precision": 2
  },
  {
    "symbol": "aTUSD",
    "address": "0x4DA9b813057D04BAef4e5800E36083717b4a0341",
    "decimals": 18,
    "iconAddress": "0x4DA9b813057D04BAef4e5800E36083717b4a0341",
    "precision": 2
  },
  {
    "symbol": "aSUSD",
    "address": "0x625aE63000f46200499120B906716420bd059240",
    "decimals": 18,
    "iconAddress": "0x625aE63000f46200499120B906716420bd059240",
    "precision": 2
  }
]

The trustwallet JSON with the mapping of images come from here: https://github.com/trustwallet/assets/blob/master/blockchains/ethereum/whitelist.json