Added function to generate CREATE2 addresses (#697).

ethers-io · Jan 6, 2020 · eb26a6d · eb26a6d
1 parent a648f2b
commit eb26a6d
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Showing 2 changed files with 12 additions and 2 deletions.
diff --git a/packages/address/src.ts/index.ts b/packages/address/src.ts/index.ts
@@ -3,7 +3,7 @@
 // We use this for base 36 maths
 import { BN } from "bn.js";
 
-import { arrayify, hexDataSlice, isHexString, stripZeros } from "@ethersproject/bytes";
+import { arrayify, BytesLike, concat, hexDataLength, hexDataSlice, isHexString, stripZeros } from "@ethersproject/bytes";
 import { BigNumber, BigNumberish } from "@ethersproject/bignumber";
 import { keccak256 } from "@ethersproject/keccak256";
 import { encode } from "@ethersproject/rlp";
@@ -143,3 +143,12 @@ export function getContractAddress(transaction: { from: string, nonce: BigNumber
     return getAddress(hexDataSlice(keccak256(encode([ from, nonce ])), 12));
 }
 
+export function getCreate2Address(from: string, salt: BytesLike, initCodeHash: BytesLike): string {
+    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))
+}
diff --git a/packages/ethers/src.ts/utils.ts b/packages/ethers/src.ts/utils.ts
@@ -1,7 +1,7 @@
 "use strict";
 
 import { AbiCoder, defaultAbiCoder, EventFragment, FormatTypes, Fragment, FunctionFragment, Indexed, Interface, ParamType } from "@ethersproject/abi";
-import { getAddress, getContractAddress, getIcapAddress, isAddress } from "@ethersproject/address";
+import { getAddress, getCreate2Address, getContractAddress, getIcapAddress, isAddress } from "@ethersproject/address";
 import * as base64 from "@ethersproject/base64";
 import { arrayify, concat, hexDataSlice, hexDataLength, hexlify, hexStripZeros, hexValue, hexZeroPad, isHexString, joinSignature, zeroPad, splitSignature, stripZeros } from "@ethersproject/bytes";
 import { hashMessage, id, isValidName, namehash } from "@ethersproject/hash";
@@ -102,6 +102,7 @@ export {
     getAddress,
     getIcapAddress,
     getContractAddress,
+    getCreate2Address,
     isAddress,
 
     formatEther,