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authorLeonid Logvinov <logvinov.leon@gmail.com>2017-08-24 21:58:22 +0800
committerLeonid Logvinov <logvinov.leon@gmail.com>2017-08-25 04:48:51 +0800
commit79dcc1660e5201a6c8738ed6117ba80e96d7c225 (patch)
tree5c273ca14d8b139a60569e4b54a4f7c6bede2d65 /test
parent6f227c152d49b6266fab3c8eb054c16e3c9cef45 (diff)
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Add a test that unlimited allowance reduces gas cost
Diffstat (limited to 'test')
-rw-r--r--test/token_wrapper_test.ts28
1 files changed, 28 insertions, 0 deletions
diff --git a/test/token_wrapper_test.ts b/test/token_wrapper_test.ts
index e466cc0ad..22e1ff12d 100644
--- a/test/token_wrapper_test.ts
+++ b/test/token_wrapper_test.ts
@@ -16,6 +16,7 @@ import {
ApprovalContractEventArgs,
} from '../src';
import {BlockchainLifecycle} from './utils/blockchain_lifecycle';
+import {TokenUtils} from './utils/token_utils';
import {DoneCallback} from '../src/types';
chaiSetup.configure();
@@ -27,6 +28,7 @@ describe('TokenWrapper', () => {
let zeroEx: ZeroEx;
let userAddresses: string[];
let tokens: Token[];
+ let tokenUtils: TokenUtils;
let coinbase: string;
let addressWithoutFunds: string;
before(async () => {
@@ -34,6 +36,7 @@ describe('TokenWrapper', () => {
zeroEx = new ZeroEx(web3.currentProvider);
userAddresses = await promisify(web3.eth.getAccounts)();
tokens = await zeroEx.tokenRegistry.getTokensAsync();
+ tokenUtils = new TokenUtils(tokens);
coinbase = userAddresses[0];
addressWithoutFunds = userAddresses[1];
});
@@ -216,6 +219,31 @@ describe('TokenWrapper', () => {
const allowance = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress, spenderAddress);
return expect(allowance).to.be.bignumber.equal(zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS);
});
+ it('should reduce the gas cost for transfers including tokens with unlimited allowance support', async () => {
+ const transferAmount = new BigNumber(5);
+ const zrx = tokenUtils.getProtocolTokenOrThrow();
+ const [, userWithNormalAllowance, userWithUnlimitedAllowance] = userAddresses;
+ await zeroEx.token.setAllowanceAsync(zrx.address, coinbase, userWithNormalAllowance, transferAmount);
+ await zeroEx.token.setUnlimitedAllowanceAsync(zrx.address, coinbase, userWithUnlimitedAllowance);
+
+ const initBalanceWithNormalAllowance = await promisify(web3.eth.getBalance)(userWithNormalAllowance);
+ const initBalanceWithUnlimitedAllowance = await promisify(web3.eth.getBalance)(userWithUnlimitedAllowance);
+
+ await zeroEx.token.transferFromAsync(
+ zrx.address, coinbase, userWithNormalAllowance, userWithNormalAllowance, transferAmount,
+ );
+ await zeroEx.token.transferFromAsync(
+ zrx.address, coinbase, userWithUnlimitedAllowance, userWithUnlimitedAllowance, transferAmount,
+ );
+
+ const finalBalanceWithNormalAllowance = await promisify(web3.eth.getBalance)(userWithNormalAllowance);
+ const finalBalanceWithUnlimitedAllowance = await promisify(web3.eth.getBalance)(userWithUnlimitedAllowance);
+
+ const normalGasCost = initBalanceWithNormalAllowance.minus(finalBalanceWithNormalAllowance);
+ const unlimitedGasCost = initBalanceWithUnlimitedAllowance.minus(finalBalanceWithUnlimitedAllowance);
+
+ expect(normalGasCost.toNumber()).to.be.gt(unlimitedGasCost.toNumber());
+ });
});
describe('#getAllowanceAsync', () => {
describe('With web3 provider with accounts', () => {