solhint/lib/rules/security/not-rely-on-block-hash.js

Solidity Code Linter

const BaseChecker = require('../base-checker')

const ruleId = 'not-rely-on-block-hash'
const meta = {
  type: 'security',

  docs: {
    description: `Do not rely on "block.blockhash". Miners can influence its value.`,
    category: 'Security Rules',
  },

  recommended: true,
  defaultSetup: 'warn',

  schema: null,
}

class NotRelyOnBlockHashChecker extends BaseChecker {
  constructor(reporter) {
    super(reporter, ruleId, meta)
  }

  MemberAccess(node) {
    if (node.expression.name === 'block' && node.memberName === 'blockhash') {
      this._warn(node)
    }
  }

  _warn(node) {
    this.warn(node, 'Do not rely on "block.blockhash". Miners can influence its value.')
  }
}

module.exports = NotRelyOnBlockHashChecker