text: "use strict";
  
  import { arrayify, concat, hexDataLength, hexDataSlice, isHexString, stripZeros } from "@ethersproject/bytes";
  import { BigNumber, _base16To36, _base36To16 } from "@ethersproject/bignumber";
  import { keccak256 } from "@ethersproject/keccak256";
  import { encode } from "@ethersproject/rlp";
  import { Logger } from "@ethersproject/logger";
  import { version } from "./_version";
  const logger = new Logger(version);
  function getChecksumAddress(address) {
      if (!isHexString(address, 20)) {
          logger.throwArgumentError("invalid address", "address", address);
      }
      address = address.toLowerCase();
      const chars = address.substring(2).split("");
      const expanded = new Uint8Array(40);
      for (let i = 0; i < 40; i++) {
          expanded[i] = chars[i].charCodeAt(0);
      }
      const hashed = arrayify(keccak256(expanded));
      for (let i = 0; i < 40; i += 2) {
          if (hashed[i >> 1] >> 4 >= 8) {
              chars[i] = chars[i].toUpperCase();
          }
          if ((hashed[i >> 1] & 0x0f) >= 8) {
              chars[i + 1] = chars[i + 1].toUpperCase();
          }
      }
      return "0x" + chars.join("");
  }
  // Shims for environments that are missing some required constants and functions
  const MAX_SAFE_INTEGER = 0x1fffffffffffff;
  function log10(x) {
      if (Math.log10) {
          return Math.log10(x);
      }
      return Math.log(x) / Math.LN10;
  }
  // See: https://en.wikipedia.org/wiki/International_Bank_Account_Number
  // Create lookup table
  const ibanLookup = {};
  for (let i = 0; i < 10; i++) {
      ibanLookup[String(i)] = String(i);
  }
  for (let i = 0; i < 26; i++) {
      ibanLookup[String.fromCharCode(65 + i)] = String(10 + i);
  }
  // How many decimal digits can we process? (for 64-bit float, this is 15)
  const safeDigits = Math.floor(log10(MAX_SAFE_INTEGER));
  function ibanChecksum(address) {
      address = address.toUpperCase();
      address = address.substring(4) + address.substring(0, 2) + "00";
      let expanded = address.split("").map(c => {
          return ibanLookup[c];
      }).join("");
      // Javascript can handle integers safely up to 15 (decimal) digits
      while (expanded.length >= safeDigits) {
          let block = expanded.substring(0, safeDigits);
          expanded = parseInt(block, 10) % 97 + expanded.substring(block.length);
      }
      let checksum = String(98 - parseInt(expanded, 10) % 97);
      while (checksum.length < 2) {
          checksum = "0" + checksum;
      }
      return checksum;
  }
  ;
  export function getAddress(address) {
      let result = null;
      if (typeof address !== "string") {
          logger.throwArgumentError("invalid address", "address", address);
      }
      if (address.match(/^(0x)?[0-9a-fA-F]{40}$/)) {
          // Missing the 0x prefix
          if (address.substring(0, 2) !== "0x") {
              address = "0x" + address;
          }
          result = getChecksumAddress(address);
          // It is a checksummed address with a bad checksum
          if (address.match(/([A-F].*[a-f])|([a-f].*[A-F])/) && result !== address) {
              logger.throwArgumentError("bad address checksum", "address", address);
          }
          // Maybe ICAP? (we only support direct mode)
      } else if (address.match(/^XE[0-9]{2}[0-9A-Za-z]{30,31}$/)) {
          // It is an ICAP address with a bad checksum
          if (address.substring(2, 4) !== ibanChecksum(address)) {
              logger.throwArgumentError("bad icap checksum", "address", address);
          }
          result = _base36To16(address.substring(4));
          while (result.length < 40) {
              result = "0" + result;
          }
          result = getChecksumAddress("0x" + result);
      } else {
          logger.throwArgumentError("invalid address", "address", address);
      }
      return result;
  }
  export function isAddress(address) {
      try {
          getAddress(address);
          return true;
      } catch (error) {}
      return false;
  }
  export function getIcapAddress(address) {
      let base36 = _base16To36(getAddress(address).substring(2)).toUpperCase();
      while (base36.length < 30) {
          base36 = "0" + base36;
      }
      return "XE" + ibanChecksum("XE00" + base36) + base36;
  }
  // http://ethereum.stackexchange.com/questions/760/how-is-the-address-of-an-ethereum-contract-computed
  export function getContractAddress(transaction) {
      let from = null;
      try {
          from = getAddress(transaction.from);
      } catch (error) {
          logger.throwArgumentError("missing from address", "transaction", transaction);
      }
      const nonce = stripZeros(arrayify(BigNumber.from(transaction.nonce).toHexString()));
      return getAddress(hexDataSlice(keccak256(encode([from, nonce])), 12));
  }
  export function getCreate2Address(from, salt, initCodeHash) {
      if (hexDataLength(salt) !== 32) {
          logger.throwArgumentError("salt must be 32 bytes", "salt", salt);
      }
      if (hexDataLength(initCodeHash) !== 32) {
          logger.throwArgumentError("initCodeHash must be 32 bytes", "initCodeHash", initCodeHash);
      }
      return getAddress(hexDataSlice(keccak256(concat(["0xff", getAddress(from), salt, initCodeHash])), 12));
  }
  //# sourceMappingURL=index.js.map