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-rw-r--r--packages/assert/package.json2
-rw-r--r--packages/assert/src/address_utils.ts34
-rw-r--r--packages/assert/src/index.ts7
3 files changed, 39 insertions, 4 deletions
diff --git a/packages/assert/package.json b/packages/assert/package.json
index 65b163c21..800207ae6 100644
--- a/packages/assert/package.json
+++ b/packages/assert/package.json
@@ -39,7 +39,7 @@
"dependencies": {
"@0xproject/json-schemas": "^0.6.10",
"bignumber.js": "~4.1.0",
- "ethereum-address": "^0.0.4",
+ "js-sha3": "^0.7.0",
"lodash": "^4.17.4",
"valid-url": "^1.0.9"
}
diff --git a/packages/assert/src/address_utils.ts b/packages/assert/src/address_utils.ts
new file mode 100644
index 000000000..bdbcd3a89
--- /dev/null
+++ b/packages/assert/src/address_utils.ts
@@ -0,0 +1,34 @@
+import * as jsSHA3 from 'js-sha3';
+
+const BASIC_ADDRESS_REGEX = /^(0x)?[0-9a-f]{40}$/i;
+const SAME_CASE_ADDRESS_REGEX = /^(0x)?([0-9a-f]{40}|[0-9A-F]{40})$/;
+
+export const addressUtils = {
+ isChecksumAddress(address: string): boolean {
+ // Check each case
+ const unprefixedAddress = address.replace('0x', '');
+ const addressHash = jsSHA3.keccak256(unprefixedAddress.toLowerCase());
+
+ for (let i = 0; i < 40; i++) {
+ // The nth letter should be uppercase if the nth digit of casemap is 1
+ if ((parseInt(addressHash[i], 16) > 7 && unprefixedAddress[i].toUpperCase() !== unprefixedAddress[i]) ||
+ (parseInt(addressHash[i], 16) <= 7 && unprefixedAddress[i].toLowerCase() !== unprefixedAddress[i])) {
+ return false;
+ }
+ }
+ return true;
+ },
+ isAddress(address: string): boolean {
+ if (!BASIC_ADDRESS_REGEX.test(address)) {
+ // Check if it has the basic requirements of an address
+ return false;
+ } else if (SAME_CASE_ADDRESS_REGEX.test(address)) {
+ // If it's all small caps or all all caps, return true
+ return true;
+ } else {
+ // Otherwise check each case
+ const isValidChecksummedAddress = addressUtils.isChecksumAddress(address);
+ return isValidChecksummedAddress;
+ }
+ },
+};
diff --git a/packages/assert/src/index.ts b/packages/assert/src/index.ts
index 92bcf6f03..94900074a 100644
--- a/packages/assert/src/index.ts
+++ b/packages/assert/src/index.ts
@@ -3,10 +3,11 @@ import {
SchemaValidator,
} from '@0xproject/json-schemas';
import BigNumber from 'bignumber.js';
-import * as ethereum_address from 'ethereum-address';
import * as _ from 'lodash';
import * as validUrl from 'valid-url';
+import {addressUtils} from './address_utils';
+
const HEX_REGEX = /^0x[0-9A-F]*$/i;
export const assert = {
@@ -35,9 +36,9 @@ export const assert = {
this.typeAssertionMessage(variableName, 'HexString', value));
},
isETHAddressHex(variableName: string, value: string): void {
- this.assert(ethereum_address.isAddress(value), this.typeAssertionMessage(variableName, 'ETHAddressHex', value));
+ this.assert(addressUtils.isAddress(value), this.typeAssertionMessage(variableName, 'ETHAddressHex', value));
this.assert(
- ethereum_address.isAddress(value) && value.toLowerCase() === value,
+ addressUtils.isAddress(value) && value.toLowerCase() === value,
`Checksummed addresses are not supported. Convert ${variableName} to lower case before passing`,
);
},