Refactor @0x/contracts-utils from @0x/contracts-core

2 files changed, 0 insertions, 891 deletions

diff --git a/contracts/core/test/exchange/libs.ts b/contracts/core/test/exchange/libs.ts
index f52992c13..44ff6a844 100644
--- a/contracts/core/test/exchange/libs.ts
+++ b/contracts/core/test/exchange/libs.ts
@@ -13,7 +13,6 @@ import { SignedOrder } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 import * as chai from 'chai';
 
-import { TestConstantsContract } from '../../generated-wrappers/test_constants';
 import { TestLibsContract } from '../../generated-wrappers/test_libs';
 import { artifacts } from '../../src/artifacts';
 
@@ -26,7 +25,6 @@ describe('Exchange libs', () => {
     let signedOrder: SignedOrder;
     let orderFactory: OrderFactory;
     let libs: TestLibsContract;
-    let testConstants: TestConstantsContract;
 
     before(async () => {
         await blockchainLifecycle.startAsync();
@@ -38,11 +36,6 @@ describe('Exchange libs', () => {
         const accounts = await web3Wrapper.getAvailableAddressesAsync();
         const makerAddress = accounts[0];
         libs = await TestLibsContract.deployFrom0xArtifactAsync(artifacts.TestLibs, provider, txDefaults);
-        testConstants = await TestConstantsContract.deployFrom0xArtifactAsync(
-            artifacts.TestConstants,
-            provider,
-            txDefaults,
-        );
 
         const defaultOrderParams = {
             ...constants.STATIC_ORDER_PARAMS,
@@ -62,15 +55,6 @@ describe('Exchange libs', () => {
     afterEach(async () => {
         await blockchainLifecycle.revertAsync();
     });
-
-    describe('LibConstants', () => {
-        describe('ZRX_ASSET_DATA', () => {
-            it('should have the correct ZRX_ASSET_DATA', async () => {
-                const isValid = await testConstants.assertValidZrxAssetData.callAsync();
-                expect(isValid).to.be.equal(true);
-            });
-        });
-    });
     // Note(albrow): These tests are designed to be supplemental to the
     // combinatorial tests in test/exchange/internal. They test specific edge
     // cases that are not covered by the combinatorial tests.
diff --git a/contracts/core/test/libraries/lib_bytes.ts b/contracts/core/test/libraries/lib_bytes.ts
deleted file mode 100644
index 9338e6e7f..000000000
--- a/contracts/core/test/libraries/lib_bytes.ts
+++ /dev/null
@@ -1,875 +0,0 @@
-import {
-    chaiSetup,
-    constants,
-    expectContractCallFailedAsync,
-    provider,
-    txDefaults,
-    typeEncodingUtils,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { generatePseudoRandomSalt } from '@0x/order-utils';
-import { RevertReason } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import BN = require('bn.js');
-import * as chai from 'chai';
-import ethUtil = require('ethereumjs-util');
-import * as _ from 'lodash';
-
-import { TestLibBytesContract } from '../../generated-wrappers/test_lib_bytes';
-import { artifacts } from '../../src/artifacts';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-// BUG: Ideally we would use Buffer.from(memory).toString('hex')
-// https://github.com/Microsoft/TypeScript/issues/23155
-const toHex = (buf: Uint8Array): string => buf.reduce((a, v) => a + ('00' + v.toString(16)).slice(-2), '0x');
-
-const fromHex = (str: string): Uint8Array => Uint8Array.from(Buffer.from(str.slice(2), 'hex'));
-
-describe('LibBytes', () => {
-    let libBytes: TestLibBytesContract;
-    const byteArrayShorterThan32Bytes = '0x012345';
-    const byteArrayShorterThan20Bytes = byteArrayShorterThan32Bytes;
-    const byteArrayLongerThan32Bytes =
-        '0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef';
-    const byteArrayLongerThan32BytesFirstBytesSwapped =
-        '0x2301456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef';
-    const byteArrayLongerThan32BytesLastBytesSwapped =
-        '0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef0123456789abefcd';
-    let testAddress: string;
-    let testAddressB: string;
-    const testBytes32 = '0x102030405060708090a0b0c0d0e0f0102030405060708090a0b0c0d0e0f01020';
-    const testBytes32B = '0x534877abd8443578526845cdfef020047528759477fedef87346527659aced32';
-    const testUint256 = new BigNumber(testBytes32, 16);
-    const testUint256B = new BigNumber(testBytes32B, 16);
-    const testBytes4 = '0xabcdef12';
-    const testByte = '0xab';
-    let shortData: string;
-    let shortTestBytes: string;
-    let shortTestBytesAsBuffer: Buffer;
-    let wordOfData: string;
-    let wordOfTestBytes: string;
-    let wordOfTestBytesAsBuffer: Buffer;
-    let longData: string;
-    let longTestBytes: string;
-    let longTestBytesAsBuffer: Buffer;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        // Setup accounts & addresses
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        testAddress = accounts[1];
-        testAddressB = accounts[2];
-        // Deploy LibBytes
-        libBytes = await TestLibBytesContract.deployFrom0xArtifactAsync(artifacts.TestLibBytes, provider, txDefaults);
-        // Verify lengths of test data
-        const byteArrayShorterThan32BytesLength = ethUtil.toBuffer(byteArrayShorterThan32Bytes).byteLength;
-        expect(byteArrayShorterThan32BytesLength).to.be.lessThan(32);
-        const byteArrayLongerThan32BytesLength = ethUtil.toBuffer(byteArrayLongerThan32Bytes).byteLength;
-        expect(byteArrayLongerThan32BytesLength).to.be.greaterThan(32);
-        const testBytes32Length = ethUtil.toBuffer(testBytes32).byteLength;
-        expect(testBytes32Length).to.be.equal(32);
-        // Create short test bytes
-        shortData = '0xffffaa';
-        const encodedShortData = ethUtil.toBuffer(shortData);
-        const shortDataLength = new BigNumber(encodedShortData.byteLength);
-        const encodedShortDataLength = typeEncodingUtils.encodeUint256(shortDataLength);
-        shortTestBytesAsBuffer = Buffer.concat([encodedShortDataLength, encodedShortData]);
-        shortTestBytes = ethUtil.bufferToHex(shortTestBytesAsBuffer);
-        // Create test bytes one word in length
-        wordOfData = ethUtil.bufferToHex(typeEncodingUtils.encodeUint256(generatePseudoRandomSalt()));
-        const encodedWordOfData = ethUtil.toBuffer(wordOfData);
-        const wordOfDataLength = new BigNumber(encodedWordOfData.byteLength);
-        const encodedWordOfDataLength = typeEncodingUtils.encodeUint256(wordOfDataLength);
-        wordOfTestBytesAsBuffer = Buffer.concat([encodedWordOfDataLength, encodedWordOfData]);
-        wordOfTestBytes = ethUtil.bufferToHex(wordOfTestBytesAsBuffer);
-        // Create long test bytes (combines short test bytes with word of test bytes)
-        longData = ethUtil.bufferToHex(Buffer.concat([encodedShortData, encodedWordOfData]));
-        const longDataLength = new BigNumber(encodedShortData.byteLength + encodedWordOfData.byteLength);
-        const encodedLongDataLength = typeEncodingUtils.encodeUint256(longDataLength);
-        longTestBytesAsBuffer = Buffer.concat([encodedLongDataLength, encodedShortData, encodedWordOfData]);
-        longTestBytes = ethUtil.bufferToHex(longTestBytesAsBuffer);
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-
-    describe('popLastByte', () => {
-        it('should revert if length is 0', async () => {
-            return expectContractCallFailedAsync(
-                libBytes.publicPopLastByte.callAsync(constants.NULL_BYTES),
-                RevertReason.LibBytesGreaterThanZeroLengthRequired,
-            );
-        });
-        it('should pop the last byte from the input and return it when array holds more than 1 byte', async () => {
-            const [newBytes, poppedByte] = await libBytes.publicPopLastByte.callAsync(byteArrayLongerThan32Bytes);
-            const expectedNewBytes = byteArrayLongerThan32Bytes.slice(0, -2);
-            const expectedPoppedByte = `0x${byteArrayLongerThan32Bytes.slice(-2)}`;
-            expect(newBytes).to.equal(expectedNewBytes);
-            expect(poppedByte).to.equal(expectedPoppedByte);
-        });
-        it('should pop the last byte from the input and return it when array is exactly 1 byte', async () => {
-            const [newBytes, poppedByte] = await libBytes.publicPopLastByte.callAsync(testByte);
-            const expectedNewBytes = '0x';
-            expect(newBytes).to.equal(expectedNewBytes);
-            return expect(poppedByte).to.be.equal(testByte);
-        });
-    });
-
-    describe('popLast20Bytes', () => {
-        it('should revert if length is less than 20', async () => {
-            return expectContractCallFailedAsync(
-                libBytes.publicPopLast20Bytes.callAsync(byteArrayShorterThan20Bytes),
-                RevertReason.LibBytesGreaterOrEqualTo20LengthRequired,
-            );
-        });
-        it('should pop the last 20 bytes from the input and return it when array holds more than 20 bytes', async () => {
-            const [newBytes, poppedAddress] = await libBytes.publicPopLast20Bytes.callAsync(byteArrayLongerThan32Bytes);
-            const expectedNewBytes = byteArrayLongerThan32Bytes.slice(0, -40);
-            const expectedPoppedAddress = `0x${byteArrayLongerThan32Bytes.slice(-40)}`;
-            expect(newBytes).to.equal(expectedNewBytes);
-            expect(poppedAddress).to.equal(expectedPoppedAddress);
-        });
-        it('should pop the last 20 bytes from the input and return it when array is exactly 20 bytes', async () => {
-            const [newBytes, poppedAddress] = await libBytes.publicPopLast20Bytes.callAsync(testAddress);
-            const expectedNewBytes = '0x';
-            const expectedPoppedAddress = testAddress;
-            expect(newBytes).to.equal(expectedNewBytes);
-            expect(poppedAddress).to.equal(expectedPoppedAddress);
-        });
-    });
-
-    describe('equals', () => {
-        it('should return true if byte arrays are equal (both arrays < 32 bytes)', async () => {
-            const isEqual = await libBytes.publicEquals.callAsync(
-                byteArrayShorterThan32Bytes,
-                byteArrayShorterThan32Bytes,
-            );
-            return expect(isEqual).to.be.true();
-        });
-        it('should return true if byte arrays are equal (both arrays > 32 bytes)', async () => {
-            const isEqual = await libBytes.publicEquals.callAsync(
-                byteArrayLongerThan32Bytes,
-                byteArrayLongerThan32Bytes,
-            );
-            return expect(isEqual).to.be.true();
-        });
-        it('should return false if byte arrays are not equal (first array < 32 bytes, second array > 32 bytes)', async () => {
-            const isEqual = await libBytes.publicEquals.callAsync(
-                byteArrayShorterThan32Bytes,
-                byteArrayLongerThan32Bytes,
-            );
-            return expect(isEqual).to.be.false();
-        });
-        it('should return false if byte arrays are not equal (first array > 32 bytes, second array < 32 bytes)', async () => {
-            const isEqual = await libBytes.publicEquals.callAsync(
-                byteArrayLongerThan32Bytes,
-                byteArrayShorterThan32Bytes,
-            );
-            return expect(isEqual).to.be.false();
-        });
-        it('should return false if byte arrays are not equal (same length, but a byte in first word differs)', async () => {
-            const isEqual = await libBytes.publicEquals.callAsync(
-                byteArrayLongerThan32BytesFirstBytesSwapped,
-                byteArrayLongerThan32Bytes,
-            );
-            return expect(isEqual).to.be.false();
-        });
-        it('should return false if byte arrays are not equal (same length, but a byte in last word differs)', async () => {
-            const isEqual = await libBytes.publicEquals.callAsync(
-                byteArrayLongerThan32BytesLastBytesSwapped,
-                byteArrayLongerThan32Bytes,
-            );
-            return expect(isEqual).to.be.false();
-        });
-
-        describe('should ignore trailing data', () => {
-            it('should return true when both < 32 bytes', async () => {
-                const isEqual = await libBytes.publicEqualsPop1.callAsync('0x0102', '0x0103');
-                return expect(isEqual).to.be.true();
-            });
-        });
-    });
-
-    describe('deepCopyBytes', () => {
-        it('should revert if dest is shorter than source', async () => {
-            return expectContractCallFailedAsync(
-                libBytes.publicDeepCopyBytes.callAsync(byteArrayShorterThan32Bytes, byteArrayLongerThan32Bytes),
-                RevertReason.LibBytesGreaterOrEqualToSourceBytesLengthRequired,
-            );
-        });
-        it('should overwrite dest with source if source and dest have equal length', async () => {
-            const zeroedByteArrayLongerThan32Bytes = `0x${_.repeat('0', byteArrayLongerThan32Bytes.length - 2)}`;
-            const zeroedBytesAfterCopy = await libBytes.publicDeepCopyBytes.callAsync(
-                zeroedByteArrayLongerThan32Bytes,
-                byteArrayLongerThan32Bytes,
-            );
-            return expect(zeroedBytesAfterCopy).to.be.equal(byteArrayLongerThan32Bytes);
-        });
-        it('should overwrite the leftmost len(source) bytes of dest if dest is larger than source', async () => {
-            const zeroedByteArrayLongerThan32Bytes = `0x${_.repeat('0', byteArrayLongerThan32Bytes.length * 2)}`;
-            const zeroedBytesAfterCopy = await libBytes.publicDeepCopyBytes.callAsync(
-                zeroedByteArrayLongerThan32Bytes,
-                byteArrayLongerThan32Bytes,
-            );
-            const copiedBytes = zeroedBytesAfterCopy.slice(0, byteArrayLongerThan32Bytes.length);
-            return expect(copiedBytes).to.be.equal(byteArrayLongerThan32Bytes);
-        });
-        it('should not overwrite the rightmost bytes of dest if dest is larger than source', async () => {
-            const zeroedByteArrayLongerThan32Bytes = `0x${_.repeat('0', byteArrayLongerThan32Bytes.length * 2)}`;
-            const zeroedBytesAfterCopy = await libBytes.publicDeepCopyBytes.callAsync(
-                zeroedByteArrayLongerThan32Bytes,
-                byteArrayLongerThan32Bytes,
-            );
-            const expectedNotCopiedBytes = zeroedByteArrayLongerThan32Bytes.slice(byteArrayLongerThan32Bytes.length);
-            const notCopiedBytes = zeroedBytesAfterCopy.slice(byteArrayLongerThan32Bytes.length);
-            return expect(notCopiedBytes).to.be.equal(expectedNotCopiedBytes);
-        });
-    });
-
-    describe('readAddress', () => {
-        it('should successfully read address when the address takes up the whole array', async () => {
-            const byteArray = ethUtil.addHexPrefix(testAddress);
-            const testAddressOffset = new BigNumber(0);
-            const address = await libBytes.publicReadAddress.callAsync(byteArray, testAddressOffset);
-            return expect(address).to.be.equal(testAddress);
-        });
-        it('should successfully read address when it is offset in the array', async () => {
-            const addressByteArrayBuffer = ethUtil.toBuffer(testAddress);
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, addressByteArrayBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testAddressOffset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const address = await libBytes.publicReadAddress.callAsync(combinedByteArray, testAddressOffset);
-            return expect(address).to.be.equal(testAddress);
-        });
-        it('should fail if the byte array is too short to hold an address', async () => {
-            const shortByteArray = '0xabcdef';
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadAddress.callAsync(shortByteArray, offset),
-                RevertReason.LibBytesGreaterOrEqualTo20LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold an address', async () => {
-            const byteArray = testAddress;
-            const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadAddress.callAsync(byteArray, badOffset),
-                RevertReason.LibBytesGreaterOrEqualTo20LengthRequired,
-            );
-        });
-    });
-
-    describe('writeAddress', () => {
-        it('should successfully write address when the address takes up the whole array', async () => {
-            const byteArray = testAddress;
-            const testAddressOffset = new BigNumber(0);
-            const newByteArray = await libBytes.publicWriteAddress.callAsync(
-                byteArray,
-                testAddressOffset,
-                testAddressB,
-            );
-            return expect(newByteArray).to.be.equal(testAddressB);
-        });
-        it('should successfully write address when it is offset in the array', async () => {
-            const addressByteArrayBuffer = ethUtil.toBuffer(testAddress);
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, addressByteArrayBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testAddressOffset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const newByteArray = await libBytes.publicWriteAddress.callAsync(
-                combinedByteArray,
-                testAddressOffset,
-                testAddressB,
-            );
-            const newByteArrayBuffer = ethUtil.toBuffer(newByteArray);
-            const addressFromOffsetBuffer = newByteArrayBuffer.slice(prefixByteArrayBuffer.byteLength);
-            const addressFromOffset = ethUtil.addHexPrefix(ethUtil.bufferToHex(addressFromOffsetBuffer));
-            return expect(addressFromOffset).to.be.equal(testAddressB);
-        });
-        it('should fail if the byte array is too short to hold an address', async () => {
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteAddress.callAsync(byteArrayShorterThan20Bytes, offset, testAddress),
-                RevertReason.LibBytesGreaterOrEqualTo20LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold an address', async () => {
-            const byteArray = byteArrayLongerThan32Bytes;
-            const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteAddress.callAsync(byteArray, badOffset, testAddress),
-                RevertReason.LibBytesGreaterOrEqualTo20LengthRequired,
-            );
-        });
-    });
-
-    describe('readBytes32', () => {
-        it('should successfully read bytes32 when the bytes32 takes up the whole array', async () => {
-            const testBytes32Offset = new BigNumber(0);
-            const bytes32 = await libBytes.publicReadBytes32.callAsync(testBytes32, testBytes32Offset);
-            return expect(bytes32).to.be.equal(testBytes32);
-        });
-        it('should successfully read bytes32 when it is offset in the array', async () => {
-            const bytes32ByteArrayBuffer = ethUtil.toBuffer(testBytes32);
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes32ByteArrayBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testBytes32Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const bytes32 = await libBytes.publicReadBytes32.callAsync(combinedByteArray, testBytes32Offset);
-            return expect(bytes32).to.be.equal(testBytes32);
-        });
-        it('should fail if the byte array is too short to hold a bytes32', async () => {
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytes32.callAsync(byteArrayShorterThan32Bytes, offset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold a bytes32', async () => {
-            const badOffset = new BigNumber(ethUtil.toBuffer(testBytes32).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytes32.callAsync(testBytes32, badOffset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-    });
-
-    describe('writeBytes32', () => {
-        it('should successfully write bytes32 when the address takes up the whole array', async () => {
-            const byteArray = testBytes32;
-            const testBytes32Offset = new BigNumber(0);
-            const newByteArray = await libBytes.publicWriteBytes32.callAsync(
-                byteArray,
-                testBytes32Offset,
-                testBytes32B,
-            );
-            return expect(newByteArray).to.be.equal(testBytes32B);
-        });
-        it('should successfully write bytes32 when it is offset in the array', async () => {
-            const bytes32ByteArrayBuffer = ethUtil.toBuffer(testBytes32);
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes32ByteArrayBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testBytes32Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const newByteArray = await libBytes.publicWriteBytes32.callAsync(
-                combinedByteArray,
-                testBytes32Offset,
-                testBytes32B,
-            );
-            const newByteArrayBuffer = ethUtil.toBuffer(newByteArray);
-            const bytes32FromOffsetBuffer = newByteArrayBuffer.slice(prefixByteArrayBuffer.byteLength);
-            const bytes32FromOffset = ethUtil.addHexPrefix(ethUtil.bufferToHex(bytes32FromOffsetBuffer));
-            return expect(bytes32FromOffset).to.be.equal(testBytes32B);
-        });
-        it('should fail if the byte array is too short to hold a bytes32', async () => {
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteBytes32.callAsync(byteArrayShorterThan32Bytes, offset, testBytes32),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold a bytes32', async () => {
-            const byteArray = byteArrayLongerThan32Bytes;
-            const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteBytes32.callAsync(byteArray, badOffset, testBytes32),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-    });
-
-    describe('readUint256', () => {
-        it('should successfully read uint256 when the uint256 takes up the whole array', async () => {
-            const formattedTestUint256 = new BN(testUint256.toString(10));
-            const testUint256AsBuffer = ethUtil.toBuffer(formattedTestUint256);
-            const byteArray = ethUtil.bufferToHex(testUint256AsBuffer);
-            const testUint256Offset = new BigNumber(0);
-            const uint256 = await libBytes.publicReadUint256.callAsync(byteArray, testUint256Offset);
-            return expect(uint256).to.bignumber.equal(testUint256);
-        });
-        it('should successfully read uint256 when it is offset in the array', async () => {
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const formattedTestUint256 = new BN(testUint256.toString(10));
-            const testUint256AsBuffer = ethUtil.toBuffer(formattedTestUint256);
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, testUint256AsBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const uint256 = await libBytes.publicReadUint256.callAsync(combinedByteArray, testUint256Offset);
-            return expect(uint256).to.bignumber.equal(testUint256);
-        });
-        it('should fail if the byte array is too short to hold a uint256', async () => {
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadUint256.callAsync(byteArrayShorterThan32Bytes, offset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold a uint256', async () => {
-            const formattedTestUint256 = new BN(testUint256.toString(10));
-            const testUint256AsBuffer = ethUtil.toBuffer(formattedTestUint256);
-            const byteArray = ethUtil.bufferToHex(testUint256AsBuffer);
-            const badOffset = new BigNumber(testUint256AsBuffer.byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadUint256.callAsync(byteArray, badOffset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-    });
-
-    describe('writeUint256', () => {
-        it('should successfully write uint256 when the address takes up the whole array', async () => {
-            const byteArray = testBytes32;
-            const testUint256Offset = new BigNumber(0);
-            const newByteArray = await libBytes.publicWriteUint256.callAsync(
-                byteArray,
-                testUint256Offset,
-                testUint256B,
-            );
-            const newByteArrayAsUint256 = new BigNumber(newByteArray, 16);
-            return expect(newByteArrayAsUint256).to.be.bignumber.equal(testUint256B);
-        });
-        it('should successfully write uint256 when it is offset in the array', async () => {
-            const bytes32ByteArrayBuffer = ethUtil.toBuffer(testBytes32);
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes32ByteArrayBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const newByteArray = await libBytes.publicWriteUint256.callAsync(
-                combinedByteArray,
-                testUint256Offset,
-                testUint256B,
-            );
-            const newByteArrayBuffer = ethUtil.toBuffer(newByteArray);
-            const uint256FromOffsetBuffer = newByteArrayBuffer.slice(prefixByteArrayBuffer.byteLength);
-            const uint256FromOffset = new BigNumber(
-                ethUtil.addHexPrefix(ethUtil.bufferToHex(uint256FromOffsetBuffer)),
-                16,
-            );
-            return expect(uint256FromOffset).to.be.bignumber.equal(testUint256B);
-        });
-        it('should fail if the byte array is too short to hold a uint256', async () => {
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteUint256.callAsync(byteArrayShorterThan32Bytes, offset, testUint256),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold a uint256', async () => {
-            const byteArray = byteArrayLongerThan32Bytes;
-            const badOffset = new BigNumber(ethUtil.toBuffer(byteArray).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteUint256.callAsync(byteArray, badOffset, testUint256),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-    });
-
-    describe('readBytes4', () => {
-        // AssertionError: expected promise to be rejected with an error including 'revert' but it was fulfilled with '0x08c379a0'
-        it('should revert if byte array has a length < 4', async () => {
-            const byteArrayLessThan4Bytes = '0x010101';
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytes4.callAsync(byteArrayLessThan4Bytes, offset),
-                RevertReason.LibBytesGreaterOrEqualTo4LengthRequired,
-            );
-        });
-        it('should return the first 4 bytes of a byte array of arbitrary length', async () => {
-            const first4Bytes = await libBytes.publicReadBytes4.callAsync(byteArrayLongerThan32Bytes, new BigNumber(0));
-            const expectedFirst4Bytes = byteArrayLongerThan32Bytes.slice(0, 10);
-            expect(first4Bytes).to.equal(expectedFirst4Bytes);
-        });
-        it('should successfully read bytes4 when the bytes4 takes up the whole array', async () => {
-            const testBytes4Offset = new BigNumber(0);
-            const bytes4 = await libBytes.publicReadBytes4.callAsync(testBytes4, testBytes4Offset);
-            return expect(bytes4).to.be.equal(testBytes4);
-        });
-        it('should successfully read bytes4 when it is offset in the array', async () => {
-            const bytes4ByteArrayBuffer = ethUtil.toBuffer(testBytes4);
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, bytes4ByteArrayBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testBytes4Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const bytes4 = await libBytes.publicReadBytes4.callAsync(combinedByteArray, testBytes4Offset);
-            return expect(bytes4).to.be.equal(testBytes4);
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold a bytes4', async () => {
-            const badOffset = new BigNumber(ethUtil.toBuffer(testBytes4).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytes4.callAsync(testBytes4, badOffset),
-                RevertReason.LibBytesGreaterOrEqualTo4LengthRequired,
-            );
-        });
-    });
-
-    describe('readBytesWithLength', () => {
-        it('should successfully read short, nested array of bytes when it takes up the whole array', async () => {
-            const testBytesOffset = new BigNumber(0);
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(shortTestBytes, testBytesOffset);
-            return expect(bytes).to.be.equal(shortData);
-        });
-        it('should successfully read short, nested array of bytes when it is offset in the array', async () => {
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, shortTestBytesAsBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(combinedByteArray, testUint256Offset);
-            return expect(bytes).to.be.equal(shortData);
-        });
-        it('should successfully read a nested array of bytes - one word in length - when it takes up the whole array', async () => {
-            const testBytesOffset = new BigNumber(0);
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(wordOfTestBytes, testBytesOffset);
-            return expect(bytes).to.be.equal(wordOfData);
-        });
-        it('should successfully read a nested array of bytes - one word in length - when it is offset in the array', async () => {
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, wordOfTestBytesAsBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(combinedByteArray, testUint256Offset);
-            return expect(bytes).to.be.equal(wordOfData);
-        });
-        it('should successfully read long, nested array of bytes when it takes up the whole array', async () => {
-            const testBytesOffset = new BigNumber(0);
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(longTestBytes, testBytesOffset);
-            return expect(bytes).to.be.equal(longData);
-        });
-        it('should successfully read long, nested array of bytes when it is offset in the array', async () => {
-            const prefixByteArrayBuffer = ethUtil.toBuffer('0xabcdef');
-            const combinedByteArrayBuffer = Buffer.concat([prefixByteArrayBuffer, longTestBytesAsBuffer]);
-            const combinedByteArray = ethUtil.bufferToHex(combinedByteArrayBuffer);
-            const testUint256Offset = new BigNumber(prefixByteArrayBuffer.byteLength);
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(combinedByteArray, testUint256Offset);
-            return expect(bytes).to.be.equal(longData);
-        });
-        it('should fail if the byte array is too short to hold the length of a nested byte array', async () => {
-            // The length of the nested array is 32 bytes. By storing less than 32 bytes, a length cannot be read.
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytesWithLength.callAsync(byteArrayShorterThan32Bytes, offset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-        it('should fail if we store a nested byte array length, without a nested byte array', async () => {
-            const offset = new BigNumber(0);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytesWithLength.callAsync(testBytes32, offset),
-                RevertReason.LibBytesGreaterOrEqualToNestedBytesLengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold the length of a nested byte array', async () => {
-            const badOffset = new BigNumber(ethUtil.toBuffer(byteArrayShorterThan32Bytes).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytesWithLength.callAsync(byteArrayShorterThan32Bytes, badOffset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold the nested byte array', async () => {
-            const badOffset = new BigNumber(ethUtil.toBuffer(testBytes32).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicReadBytesWithLength.callAsync(testBytes32, badOffset),
-                RevertReason.LibBytesGreaterOrEqualTo32LengthRequired,
-            );
-        });
-    });
-
-    describe('writeBytesWithLength', () => {
-        it('should successfully write short, nested array of bytes when it takes up the whole array', async () => {
-            const testBytesOffset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(new Buffer(shortTestBytesAsBuffer.byteLength));
-            const bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                emptyByteArray,
-                testBytesOffset,
-                shortData,
-            );
-            const bytesRead = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset);
-            return expect(bytesRead).to.be.equal(shortData);
-        });
-        it('should successfully write short, nested array of bytes when it is offset in the array', async () => {
-            // Write a prefix to the array
-            const prefixData = '0xabcdef';
-            const prefixDataAsBuffer = ethUtil.toBuffer(prefixData);
-            const prefixOffset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(
-                new Buffer(prefixDataAsBuffer.byteLength + shortTestBytesAsBuffer.byteLength),
-            );
-            let bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                emptyByteArray,
-                prefixOffset,
-                prefixData,
-            );
-            // Write data after prefix
-            const testBytesOffset = new BigNumber(prefixDataAsBuffer.byteLength);
-            bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                bytesWritten,
-                testBytesOffset,
-                shortData,
-            );
-            // Read data after prefix and validate
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset);
-            return expect(bytes).to.be.equal(shortData);
-        });
-        it('should successfully write a nested array of bytes - one word in length - when it takes up the whole array', async () => {
-            const testBytesOffset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(new Buffer(wordOfTestBytesAsBuffer.byteLength));
-            const bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                emptyByteArray,
-                testBytesOffset,
-                wordOfData,
-            );
-            const bytesRead = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset);
-            return expect(bytesRead).to.be.equal(wordOfData);
-        });
-        it('should successfully write a nested array of bytes - one word in length - when it is offset in the array', async () => {
-            // Write a prefix to the array
-            const prefixData = '0xabcdef';
-            const prefixDataAsBuffer = ethUtil.toBuffer(prefixData);
-            const prefixOffset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(
-                new Buffer(prefixDataAsBuffer.byteLength + wordOfTestBytesAsBuffer.byteLength),
-            );
-            let bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                emptyByteArray,
-                prefixOffset,
-                prefixData,
-            );
-            // Write data after prefix
-            const testBytesOffset = new BigNumber(prefixDataAsBuffer.byteLength);
-            bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                bytesWritten,
-                testBytesOffset,
-                wordOfData,
-            );
-            // Read data after prefix and validate
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset);
-            return expect(bytes).to.be.equal(wordOfData);
-        });
-        it('should successfully write a long, nested bytes when it takes up the whole array', async () => {
-            const testBytesOffset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(new Buffer(longTestBytesAsBuffer.byteLength));
-            const bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                emptyByteArray,
-                testBytesOffset,
-                longData,
-            );
-            const bytesRead = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset);
-            return expect(bytesRead).to.be.equal(longData);
-        });
-        it('should successfully write long, nested array of bytes when it is offset in the array', async () => {
-            // Write a prefix to the array
-            const prefixData = '0xabcdef';
-            const prefixDataAsBuffer = ethUtil.toBuffer(prefixData);
-            const prefixOffset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(
-                new Buffer(prefixDataAsBuffer.byteLength + longTestBytesAsBuffer.byteLength),
-            );
-            let bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(
-                emptyByteArray,
-                prefixOffset,
-                prefixData,
-            );
-            // Write data after prefix
-            const testBytesOffset = new BigNumber(prefixDataAsBuffer.byteLength);
-            bytesWritten = await libBytes.publicWriteBytesWithLength.callAsync(bytesWritten, testBytesOffset, longData);
-            // Read data after prefix and validate
-            const bytes = await libBytes.publicReadBytesWithLength.callAsync(bytesWritten, testBytesOffset);
-            return expect(bytes).to.be.equal(longData);
-        });
-        it('should fail if the byte array is too short to hold the length of a nested byte array', async () => {
-            const offset = new BigNumber(0);
-            const emptyByteArray = ethUtil.bufferToHex(new Buffer(1));
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteBytesWithLength.callAsync(emptyByteArray, offset, longData),
-                RevertReason.LibBytesGreaterOrEqualToNestedBytesLengthRequired,
-            );
-        });
-        it('should fail if the length between the offset and end of the byte array is too short to hold the length of a nested byte array', async () => {
-            const emptyByteArray = ethUtil.bufferToHex(new Buffer(shortTestBytesAsBuffer.byteLength));
-            const badOffset = new BigNumber(ethUtil.toBuffer(shortTestBytesAsBuffer).byteLength);
-            return expectContractCallFailedAsync(
-                libBytes.publicWriteBytesWithLength.callAsync(emptyByteArray, badOffset, shortData),
-                RevertReason.LibBytesGreaterOrEqualToNestedBytesLengthRequired,
-            );
-        });
-    });
-
-    describe('memCopy', () => {
-        // Create memory 0x000102...FF
-        const memSize = 256;
-        // tslint:disable:no-shadowed-variable
-        const memory = new Uint8Array(memSize).map((_, i) => i);
-        const memHex = toHex(memory);
-
-        // Reference implementation to test against
-        const refMemcpy = (mem: Uint8Array, dest: number, source: number, length: number): Uint8Array =>
-            Uint8Array.from(mem).copyWithin(dest, source, source + length);
-
-        // Test vectors: destination, source, length, job description
-        type Tests = Array<[number, number, number, string]>;
-
-        const test = (tests: Tests) =>
-            tests.forEach(([dest, source, length, job]) =>
-                it(job, async () => {
-                    const expected = refMemcpy(memory, dest, source, length);
-                    const resultStr = await libBytes.testMemcpy.callAsync(
-                        memHex,
-                        new BigNumber(dest),
-                        new BigNumber(source),
-                        new BigNumber(length),
-                    );
-                    const result = fromHex(resultStr);
-                    expect(result).to.deep.equal(expected);
-                }),
-            );
-
-        test([[0, 0, 0, 'copies zero bytes with overlap']]);
-
-        describe('copies forward', () =>
-            test([
-                [128, 0, 0, 'zero bytes'],
-                [128, 0, 1, 'one byte'],
-                [128, 0, 11, 'eleven bytes'],
-                [128, 0, 31, 'thirty-one bytes'],
-                [128, 0, 32, 'one word'],
-                [128, 0, 64, 'two words'],
-                [128, 0, 96, 'three words'],
-                [128, 0, 33, 'one word and one byte'],
-                [128, 0, 72, 'two words and eight bytes'],
-                [128, 0, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward within one word', () =>
-            test([
-                [16, 0, 0, 'zero bytes'],
-                [16, 0, 1, 'one byte'],
-                [16, 0, 11, 'eleven bytes'],
-                [16, 0, 16, 'sixteen bytes'],
-            ]));
-
-        describe('copies forward with one byte overlap', () =>
-            test([
-                [0, 0, 1, 'one byte'],
-                [10, 0, 11, 'eleven bytes'],
-                [30, 0, 31, 'thirty-one bytes'],
-                [31, 0, 32, 'one word'],
-                [32, 0, 33, 'one word and one byte'],
-                [71, 0, 72, 'two words and eight bytes'],
-                [99, 0, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward with thirty-one bytes overlap', () =>
-            test([
-                [0, 0, 31, 'thirty-one bytes'],
-                [1, 0, 32, 'one word'],
-                [2, 0, 33, 'one word and one byte'],
-                [41, 0, 72, 'two words and eight bytes'],
-                [69, 0, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward with one word overlap', () =>
-            test([
-                [0, 0, 32, 'one word'],
-                [1, 0, 33, 'one word and one byte'],
-                [41, 0, 72, 'two words and eight bytes'],
-                [69, 0, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward with one word and one byte overlap', () =>
-            test([
-                [0, 0, 33, 'one word and one byte'],
-                [40, 0, 72, 'two words and eight bytes'],
-                [68, 0, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward with two words overlap', () =>
-            test([
-                [0, 0, 64, 'two words'],
-                [8, 0, 72, 'two words and eight bytes'],
-                [36, 0, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward within one word and one byte overlap', () =>
-            test([[0, 0, 1, 'one byte'], [10, 0, 11, 'eleven bytes'], [15, 0, 16, 'sixteen bytes']]));
-
-        describe('copies backward', () =>
-            test([
-                [0, 128, 0, 'zero bytes'],
-                [0, 128, 1, 'one byte'],
-                [0, 128, 11, 'eleven bytes'],
-                [0, 128, 31, 'thirty-one bytes'],
-                [0, 128, 32, 'one word'],
-                [0, 128, 64, 'two words'],
-                [0, 128, 96, 'three words'],
-                [0, 128, 33, 'one word and one byte'],
-                [0, 128, 72, 'two words and eight bytes'],
-                [0, 128, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies backward within one word', () =>
-            test([
-                [0, 16, 0, 'zero bytes'],
-                [0, 16, 1, 'one byte'],
-                [0, 16, 11, 'eleven bytes'],
-                [0, 16, 16, 'sixteen bytes'],
-            ]));
-
-        describe('copies backward with one byte overlap', () =>
-            test([
-                [0, 0, 1, 'one byte'],
-                [0, 10, 11, 'eleven bytes'],
-                [0, 30, 31, 'thirty-one bytes'],
-                [0, 31, 32, 'one word'],
-                [0, 32, 33, 'one word and one byte'],
-                [0, 71, 72, 'two words and eight bytes'],
-                [0, 99, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies backward with thirty-one bytes overlap', () =>
-            test([
-                [0, 0, 31, 'thirty-one bytes'],
-                [0, 1, 32, 'one word'],
-                [0, 2, 33, 'one word and one byte'],
-                [0, 41, 72, 'two words and eight bytes'],
-                [0, 69, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies backward with one word overlap', () =>
-            test([
-                [0, 0, 32, 'one word'],
-                [0, 1, 33, 'one word and one byte'],
-                [0, 41, 72, 'two words and eight bytes'],
-                [0, 69, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies backward with one word and one byte overlap', () =>
-            test([
-                [0, 0, 33, 'one word and one byte'],
-                [0, 40, 72, 'two words and eight bytes'],
-                [0, 68, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies backward with two words overlap', () =>
-            test([
-                [0, 0, 64, 'two words'],
-                [0, 8, 72, 'two words and eight bytes'],
-                [0, 36, 100, 'three words and four bytes'],
-            ]));
-
-        describe('copies forward within one word and one byte overlap', () =>
-            test([[0, 0, 1, 'one byte'], [0, 10, 11, 'eleven bytes'], [0, 15, 16, 'sixteen bytes']]));
-    });
-});
-// tslint:disable:max-file-line-count