How to use the envalid.bool function in envalid

import {
  bool,
  cleanEnv,
  email,
  host,
  json,
  port,
  num,
  str,
  url,
  type ValidatorSpec
} from 'envalid'

const booleanValidatorSpec: ValidatorSpec = bool()
const numberValidatorSpec: ValidatorSpec = num()
const stringValidatorSpec: ValidatorSpec = str()
const jsonValidatorSpec: ValidatorSpec = json()
const urlValidatorSpec: ValidatorSpec = url()
const emailValidatorSpec: ValidatorSpec = email()
const hostValidatorSpec: ValidatorSpec = host()
const portValidatorSpec: ValidatorSpec = port()

const env1: { NODE_ENV: string, ... } = cleanEnv({ NODE_ENV: 'TEST' }, {
  NODE_ENV: str()
})

// $ExpectError
const env2: { NODE_ENV: number, ... } = cleanEnv({ NODE_ENV: 'TEST' }, {
  NODE_ENV: str()
})

const urlValidatorSpec: ValidatorSpec = url()
const emailValidatorSpec: ValidatorSpec = email()
const hostValidatorSpec: ValidatorSpec = host()
const portValidatorSpec: ValidatorSpec = port()

const env1: { NODE_ENV: string, ... } = cleanEnv({ NODE_ENV: 'TEST' }, {
  NODE_ENV: str()
})

// $ExpectError
const env2: { NODE_ENV: number, ... } = cleanEnv({ NODE_ENV: 'TEST' }, {
  NODE_ENV: str()
})

// $ExpectError
const invalidBooleanValidatorSpec: ValidatorSpec = bool()

import envalid, { bool, makeValidator, str } from "envalid";

const bodyParserValidator = makeValidator((value) => {
  if (typeof value !== "number") throw new Error("Expected type number");
  if (value <= 0) throw new Error("Expected value to be greater than 0");
  return value;
});

export default envalid.cleanEnv(process.env, {
  BODY_PARSER_SIZE_LIMIT: bodyParserValidator({
    default: 5 * 1000000 // value in bytes = 5mb
  }),
  GRAPHQL_INTROSPECTION_ENABLED: bool({ default: false }),
  GRAPHQL_PLAYGROUND_ENABLED: bool({ default: false }),
  MIGRATION_BYPASS_ENABLED: bool({
    default: false,
    desc: "Bypasses migration version checks and migration runs. Enables startup if migration state is not compatible. " +
      "This can be dangerous enough to cause data inconsistencies. Use at your own risk!"
  }),
  // This is necessary to override the envalid default
  // validation for NODE_ENV, which uses
  // str({ choices: ['development', 'test', 'production'] })
  //
  // We currently need to set NODE_ENV to "jesttest" when
  // integration tests run.
  NODE_ENV: str(),
  ROOT_URL: str({
    devDefault: "http://localhost:3000",
    desc: "The protocol, domain, and port portion of the URL, to which relative paths will be appended. " +
      "This is used when full URLs are generated for things such as emails and notifications, so it must be publicly accessible.",
    example: "https://shop.mydomain.com"

"This can be dangerous enough to cause data inconsistencies. Use at your own risk!"
  }),
  // This is necessary to override the envalid default
  // validation for NODE_ENV, which uses
  // str({ choices: ['development', 'test', 'production'] })
  //
  // We currently need to set NODE_ENV to "jesttest" when
  // integration tests run.
  NODE_ENV: str(),
  ROOT_URL: str({
    devDefault: "http://localhost:3000",
    desc: "The protocol, domain, and port portion of the URL, to which relative paths will be appended. " +
      "This is used when full URLs are generated for things such as emails and notifications, so it must be publicly accessible.",
    example: "https://shop.mydomain.com"
  }),
  SKIP_FIXTURES: bool({ default: false })
});

import envalid, { bool, makeValidator, str } from "envalid";

const bodyParserValidator = makeValidator((value) => {
  if (typeof value !== "number") throw new Error("Expected type number");
  if (value <= 0) throw new Error("Expected value to be greater than 0");
  return value;
});

export default envalid.cleanEnv(process.env, {
  BODY_PARSER_SIZE_LIMIT: bodyParserValidator({
    default: 5 * 1000000 // value in bytes = 5mb
  }),
  GRAPHQL_INTROSPECTION_ENABLED: bool({ default: false }),
  GRAPHQL_PLAYGROUND_ENABLED: bool({ default: false }),
  MIGRATION_BYPASS_ENABLED: bool({
    default: false,
    desc: "Bypasses migration version checks and migration runs. Enables startup if migration state is not compatible. " +
      "This can be dangerous enough to cause data inconsistencies. Use at your own risk!"
  }),
  // This is necessary to override the envalid default
  // validation for NODE_ENV, which uses
  // str({ choices: ['development', 'test', 'production'] })
  //
  // We currently need to set NODE_ENV to "jesttest" when
  // integration tests run.
  NODE_ENV: str(),
  ROOT_URL: str({
    devDefault: "http://localhost:3000",
    desc: "The protocol, domain, and port portion of the URL, to which relative paths will be appended. " +
      "This is used when full URLs are generated for things such as emails and notifications, so it must be publicly accessible.",

import envalid, { bool, makeValidator, str } from "envalid";

const bodyParserValidator = makeValidator((value) => {
  if (typeof value !== "number") throw new Error("Expected type number");
  if (value <= 0) throw new Error("Expected value to be greater than 0");
  return value;
});

export default envalid.cleanEnv(process.env, {
  BODY_PARSER_SIZE_LIMIT: bodyParserValidator({
    default: 5 * 1000000 // value in bytes = 5mb
  }),
  GRAPHQL_INTROSPECTION_ENABLED: bool({ default: false }),
  GRAPHQL_PLAYGROUND_ENABLED: bool({ default: false }),
  MIGRATION_BYPASS_ENABLED: bool({
    default: false,
    desc: "Bypasses migration version checks and migration runs. Enables startup if migration state is not compatible. " +
      "This can be dangerous enough to cause data inconsistencies. Use at your own risk!"
  }),
  // This is necessary to override the envalid default
  // validation for NODE_ENV, which uses
  // str({ choices: ['development', 'test', 'production'] })
  //
  // We currently need to set NODE_ENV to "jesttest" when
  // integration tests run.
  NODE_ENV: str(),
  ROOT_URL: str({
    devDefault: "http://localhost:3000",
    desc: "The protocol, domain, and port portion of the URL, to which relative paths will be appended. " +

...validations,
      DPOS_STAKING_ADDRESS: addressValidator(),
      BLOCK_REWARD_ADDRESS: addressValidator()
    }
  }
}

if (BRIDGE_MODE === 'ERC_TO_ERC') {
  validations = {
    ...validations,
    ERC20_TOKEN_ADDRESS: addressValidator(),
    BRIDGEABLE_TOKEN_NAME: envalid.str(),
    BRIDGEABLE_TOKEN_SYMBOL: envalid.str(),
    BRIDGEABLE_TOKEN_DECIMALS: envalid.num(),
    DEPLOY_REWARDABLE_TOKEN: envalid.bool(),
    ERC20_EXTENDED_BY_ERC677: envalid.bool()
  }

  if (ERC20_EXTENDED_BY_ERC677 === 'true') {
    validations = {
      ...validations,
      FOREIGN_MIN_AMOUNT_PER_TX: bigNumValidator()
    }
  }

  if (DEPLOY_REWARDABLE_TOKEN === 'true') {
    validations = {
      ...validations,
      DPOS_STAKING_ADDRESS: addressValidator(),
      BLOCK_REWARD_ADDRESS: addressValidator()
    }
  }

import envalid, { bool } from "envalid";

export default envalid.cleanEnv(process.env, {
  AUTO_PUBLISH_INVENTORY_FIELDS: bool({ default: true })
});

validations = {
      ...validations,
      DPOS_STAKING_ADDRESS: addressValidator(),
      BLOCK_REWARD_ADDRESS: addressValidator()
    }
  }
}

if (BRIDGE_MODE === 'ERC_TO_ERC') {
  validations = {
    ...validations,
    ERC20_TOKEN_ADDRESS: addressValidator(),
    BRIDGEABLE_TOKEN_NAME: envalid.str(),
    BRIDGEABLE_TOKEN_SYMBOL: envalid.str(),
    BRIDGEABLE_TOKEN_DECIMALS: envalid.num(),
    DEPLOY_REWARDABLE_TOKEN: envalid.bool(),
    ERC20_EXTENDED_BY_ERC677: envalid.bool()
  }

  if (ERC20_EXTENDED_BY_ERC677 === 'true') {
    validations = {
      ...validations,
      FOREIGN_MIN_AMOUNT_PER_TX: bigNumValidator()
    }
  }

  if (DEPLOY_REWARDABLE_TOKEN === 'true') {
    validations = {
      ...validations,
      DPOS_STAKING_ADDRESS: addressValidator(),
      BLOCK_REWARD_ADDRESS: addressValidator()
    }