market/app.config.js

module.exports = {
  network: process.env.GATSBY_NETWORK || 'rinkeby',
  infuraProjectId: process.env.GATSBY_INFURA_PROJECT_ID || 'xxx',
  marketFeeAddress:
    process.env.GATSBY_MARKET_FEE_ADDRESS ||
    '0x903322C7E45A60d7c8C3EA236c5beA9Af86310c7',
  marketFeeAmount: process.env.GATSBY_MARKET_FEE_AMOUNT || '0.1' // in %
}