Introduce ethereum-types package

81 files changed, 511 insertions, 361 deletions

diff --git a/packages/abi-gen/package.json b/packages/abi-gen/package.json
index d3af33fdf..e02b930ed 100644
--- a/packages/abi-gen/package.json
+++ b/packages/abi-gen/package.json
@@ -27,9 +27,9 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/abi-gen/README.md",
     "dependencies": {
-        "@0xproject/types": "^0.7.0",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
+        "ethereum-types": "^0.0.1",
         "chalk": "^2.3.0",
         "glob": "^7.1.2",
         "handlebars": "^4.0.11",
diff --git a/packages/abi-gen/src/index.ts b/packages/abi-gen/src/index.ts
index ef5710f53..b7e6722ea 100644
--- a/packages/abi-gen/src/index.ts
+++ b/packages/abi-gen/src/index.ts
@@ -1,8 +1,8 @@
 #!/usr/bin/env node
 
-import { AbiDefinition, ConstructorAbi, EventAbi, MethodAbi } from '@0xproject/types';
 import { abiUtils, logUtils } from '@0xproject/utils';
 import chalk from 'chalk';
+import { AbiDefinition, ConstructorAbi, EventAbi, MethodAbi } from 'ethereum-types';
 import * as fs from 'fs';
 import { sync as globSync } from 'glob';
 import * as Handlebars from 'handlebars';
diff --git a/packages/abi-gen/src/types.ts b/packages/abi-gen/src/types.ts
index 648281774..68765b04d 100644
--- a/packages/abi-gen/src/types.ts
+++ b/packages/abi-gen/src/types.ts
@@ -1,4 +1,4 @@
-import { EventAbi, MethodAbi } from '@0xproject/types';
+import { EventAbi, MethodAbi } from 'ethereum-types';
 
 export enum ParamKind {
     Input = 'input',
diff --git a/packages/abi-gen/src/utils.ts b/packages/abi-gen/src/utils.ts
index 20b734959..a46209dad 100644
--- a/packages/abi-gen/src/utils.ts
+++ b/packages/abi-gen/src/utils.ts
@@ -1,4 +1,4 @@
-import { AbiType, ConstructorAbi, DataItem } from '@0xproject/types';
+import { AbiType, ConstructorAbi, DataItem } from 'ethereum-types';
 import * as fs from 'fs';
 import * as _ from 'lodash';
 import * as path from 'path';
diff --git a/packages/base-contract/package.json b/packages/base-contract/package.json
index f79d3ebf6..c01a133e4 100644
--- a/packages/base-contract/package.json
+++ b/packages/base-contract/package.json
@@ -42,7 +42,7 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/types": "^0.7.0",
+        "ethereum-types": "^0.0.1",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
         "@0xproject/web3-wrapper": "^0.6.4",
diff --git a/packages/base-contract/src/index.ts b/packages/base-contract/src/index.ts
index f9298f413..d9e28f9f2 100644
--- a/packages/base-contract/src/index.ts
+++ b/packages/base-contract/src/index.ts
@@ -1,3 +1,5 @@
+import { abiUtils, BigNumber } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import {
     AbiDefinition,
     AbiType,
@@ -8,9 +10,7 @@ import {
     Provider,
     TxData,
     TxDataPayable,
-} from '@0xproject/types';
-import { abiUtils, BigNumber } from '@0xproject/utils';
-import { Web3Wrapper } from '@0xproject/web3-wrapper';
+} from 'ethereum-types';
 import * as ethers from 'ethers';
 import * as _ from 'lodash';
 
diff --git a/packages/base-contract/src/utils.ts b/packages/base-contract/src/utils.ts
index 4b86bb1ad..61f176df5 100644
--- a/packages/base-contract/src/utils.ts
+++ b/packages/base-contract/src/utils.ts
@@ -1,4 +1,4 @@
-import { DataItem } from '@0xproject/types';
+import { DataItem } from 'ethereum-types';
 import * as _ from 'lodash';
 
 // tslint:disable-next-line:completed-docs
diff --git a/packages/contract_templates/contract.handlebars b/packages/contract_templates/contract.handlebars
index b2765b1a5..2e04200d9 100644
--- a/packages/contract_templates/contract.handlebars
+++ b/packages/contract_templates/contract.handlebars
@@ -6,7 +6,7 @@
 // tslint:disable-next-line:no-unused-variable
 import { BaseContract } from '@0xproject/base-contract';
 import { ContractArtifact } from '@0xproject/sol-compiler';
-import { BlockParam, BlockParamLiteral, CallData, ContractAbi, DataItem, MethodAbi, Provider, TxData, TxDataPayable } from '@0xproject/types';
+import { BlockParam, BlockParamLiteral, CallData, ContractAbi, DataItem, DecodedLogArgs, MethodAbi, Provider, TxData, TxDataPayable } from 'ethereum-types';
 import { BigNumber, classUtils, logUtils, promisify } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as ethers from 'ethers';
diff --git a/packages/contract_templates/partials/event.handlebars b/packages/contract_templates/partials/event.handlebars
index 3c6100e4f..69a99d937 100644
--- a/packages/contract_templates/partials/event.handlebars
+++ b/packages/contract_templates/partials/event.handlebars
@@ -1,4 +1,4 @@
-export interface {{name}}ContractEventArgs {
+export interface {{name}}ContractEventArgs extends DecodedLogArgs {
     {{#each inputs}}
     {{name}}: {{#returnType type components}}{{/returnType}};
     {{/each}}
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index d7fd9b056..300a5331a 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -75,6 +75,7 @@
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
         "@0xproject/web3-wrapper": "^0.6.4",
+        "ethereum-types": "^0.0.1",
         "bn.js": "^4.11.8",
         "ethereumjs-abi": "^0.6.4",
         "ethereumjs-util": "^5.1.1",
diff --git a/packages/contracts/src/utils/erc20_wrapper.ts b/packages/contracts/src/utils/erc20_wrapper.ts
index 92cf01cc2..733021368 100644
--- a/packages/contracts/src/utils/erc20_wrapper.ts
+++ b/packages/contracts/src/utils/erc20_wrapper.ts
@@ -1,4 +1,4 @@
-import { Provider } from '@0xproject/types';
+import { Provider } from 'ethereum-types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
diff --git a/packages/contracts/src/utils/erc721_wrapper.ts b/packages/contracts/src/utils/erc721_wrapper.ts
index bea801f3d..4e27b24ad 100644
--- a/packages/contracts/src/utils/erc721_wrapper.ts
+++ b/packages/contracts/src/utils/erc721_wrapper.ts
@@ -1,5 +1,5 @@
 import { generatePseudoRandomSalt } from '@0xproject/order-utils';
-import { Provider } from '@0xproject/types';
+import { Provider } from 'ethereum-types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
diff --git a/packages/contracts/src/utils/exchange_wrapper.ts b/packages/contracts/src/utils/exchange_wrapper.ts
index ca587f220..14d183b09 100644
--- a/packages/contracts/src/utils/exchange_wrapper.ts
+++ b/packages/contracts/src/utils/exchange_wrapper.ts
@@ -1,6 +1,7 @@
-import { Provider, SignedOrder, TransactionReceiptWithDecodedLogs } from '@0xproject/types';
+import { SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { LogEntry, Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { ExchangeContract } from '../contract_wrappers/generated/exchange';
diff --git a/packages/contracts/src/utils/log_decoder.ts b/packages/contracts/src/utils/log_decoder.ts
index 32819b657..2839cfe84 100644
--- a/packages/contracts/src/utils/log_decoder.ts
+++ b/packages/contracts/src/utils/log_decoder.ts
@@ -1,13 +1,7 @@
 import { ContractArtifact } from '@0xproject/sol-compiler';
-import {
-    AbiDefinition,
-    LogEntry,
-    LogWithDecodedArgs,
-    RawLog,
-    TransactionReceiptWithDecodedLogs,
-} from '@0xproject/types';
 import { AbiDecoder, BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { AbiDefinition, LogEntry, LogWithDecodedArgs, RawLog, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { artifacts } from './artifacts';
diff --git a/packages/contracts/src/utils/match_order_tester.ts b/packages/contracts/src/utils/match_order_tester.ts
index 87399b9f6..ec8931a20 100644
--- a/packages/contracts/src/utils/match_order_tester.ts
+++ b/packages/contracts/src/utils/match_order_tester.ts
@@ -1,7 +1,8 @@
 import { BlockchainLifecycle } from '@0xproject/dev-utils';
-import { LogWithDecodedArgs, SignedOrder } from '@0xproject/types';
+import { SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
 import ethUtil = require('ethereumjs-util');
 import * as _ from 'lodash';
 
diff --git a/packages/contracts/src/utils/multi_sig_wrapper.ts b/packages/contracts/src/utils/multi_sig_wrapper.ts
index d67692194..9971e8f6e 100644
--- a/packages/contracts/src/utils/multi_sig_wrapper.ts
+++ b/packages/contracts/src/utils/multi_sig_wrapper.ts
@@ -1,6 +1,6 @@
-import { Provider, TransactionReceiptWithDecodedLogs } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { AssetProxyOwnerContract } from '../contract_wrappers/generated/asset_proxy_owner';
diff --git a/packages/contracts/src/utils/types.ts b/packages/contracts/src/utils/types.ts
index 1eeffc70e..d68a81b51 100644
--- a/packages/contracts/src/utils/types.ts
+++ b/packages/contracts/src/utils/types.ts
@@ -1,5 +1,6 @@
-import { AbiDefinition, ContractAbi, Order } from '@0xproject/types';
+import { Order } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
+import { AbiDefinition, ContractAbi } from 'ethereum-types';
 
 export interface ERC20BalancesByOwner {
     [ownerAddress: string]: {
diff --git a/packages/contracts/src/utils/web3_wrapper.ts b/packages/contracts/src/utils/web3_wrapper.ts
index 4b8512222..2dd0dd1a3 100644
--- a/packages/contracts/src/utils/web3_wrapper.ts
+++ b/packages/contracts/src/utils/web3_wrapper.ts
@@ -1,6 +1,6 @@
 import { devConstants, env, EnvVars, web3Factory } from '@0xproject/dev-utils';
 import { prependSubprovider } from '@0xproject/subproviders';
-import { Provider } from '@0xproject/types';
+import { Provider } from 'ethereum-types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 
 import { coverage } from './coverage';
diff --git a/packages/contracts/test/asset_proxy_owner.ts b/packages/contracts/test/asset_proxy_owner.ts
index f95679e20..b0a78c601 100644
--- a/packages/contracts/test/asset_proxy_owner.ts
+++ b/packages/contracts/test/asset_proxy_owner.ts
@@ -1,5 +1,5 @@
 import { BlockchainLifecycle } from '@0xproject/dev-utils';
-import { LogWithDecodedArgs } from '@0xproject/types';
+import { LogWithDecodedArgs } from 'ethereum-types';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as _ from 'lodash';
diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts
index bc476a5ee..6282a51ea 100644
--- a/packages/contracts/test/exchange/core.ts
+++ b/packages/contracts/test/exchange/core.ts
@@ -1,8 +1,9 @@
 import { BlockchainLifecycle } from '@0xproject/dev-utils';
-import { LogWithDecodedArgs, SignedOrder } from '@0xproject/types';
+import { SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
 import ethUtil = require('ethereumjs-util');
 import 'make-promises-safe';
 
diff --git a/packages/contracts/test/exchange/match_orders.ts b/packages/contracts/test/exchange/match_orders.ts
index 0da0287bc..c901c29b9 100644
--- a/packages/contracts/test/exchange/match_orders.ts
+++ b/packages/contracts/test/exchange/match_orders.ts
@@ -1,8 +1,9 @@
 import { BlockchainLifecycle } from '@0xproject/dev-utils';
-import { LogWithDecodedArgs, SignedOrder } from '@0xproject/types';
+import { SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
 import ethUtil = require('ethereumjs-util');
 import * as _ from 'lodash';
 
diff --git a/packages/contracts/test/libraries/lib_bytes.ts b/packages/contracts/test/libraries/lib_bytes.ts
index e817951ab..4b261904a 100644
--- a/packages/contracts/test/libraries/lib_bytes.ts
+++ b/packages/contracts/test/libraries/lib_bytes.ts
@@ -1,5 +1,5 @@
 import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
-import { LogWithDecodedArgs, TransactionReceiptWithDecodedLogs } from '@0xproject/types';
+import { LogWithDecodedArgs, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BN = require('bn.js');
diff --git a/packages/contracts/test/multi_sig_with_time_lock.ts b/packages/contracts/test/multi_sig_with_time_lock.ts
index 7b7885a00..1302d0fa0 100644
--- a/packages/contracts/test/multi_sig_with_time_lock.ts
+++ b/packages/contracts/test/multi_sig_with_time_lock.ts
@@ -1,8 +1,8 @@
 import { BlockchainLifecycle, web3Factory } from '@0xproject/dev-utils';
-import { LogWithDecodedArgs } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 import 'make-promises-safe';
 import * as Web3 from 'web3';
diff --git a/packages/contracts/test/tutorials/arbitrage.ts b/packages/contracts/test/tutorials/arbitrage.ts
index e5787d5b8..df01f31bb 100644
--- a/packages/contracts/test/tutorials/arbitrage.ts
+++ b/packages/contracts/test/tutorials/arbitrage.ts
@@ -1,6 +1,6 @@
 // import { ECSignature, SignedOrder, ZeroEx } from '0x.js';
 // import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
-// import { ExchangeContractErrs } from '@0xproject/types';
+// import { ExchangeContractErrs } from 'ethereum-types';
 // import { BigNumber } from '@0xproject/utils';
 // import { Web3Wrapper } from '@0xproject/web3-wrapper';
 // import * as chai from 'chai';
diff --git a/packages/dev-utils/package.json b/packages/dev-utils/package.json
index 0b11029f6..5ba1484f3 100644
--- a/packages/dev-utils/package.json
+++ b/packages/dev-utils/package.json
@@ -45,7 +45,7 @@
     },
     "dependencies": {
         "@0xproject/subproviders": "^0.10.2",
-        "@0xproject/types": "^0.7.0",
+        "ethereum-types": "^0.0.1",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/web3-wrapper": "^0.6.4",
         "lodash": "^4.17.4",
diff --git a/packages/dev-utils/src/web3_factory.ts b/packages/dev-utils/src/web3_factory.ts
index c273035da..12872c122 100644
--- a/packages/dev-utils/src/web3_factory.ts
+++ b/packages/dev-utils/src/web3_factory.ts
@@ -7,7 +7,7 @@ import ProviderEngine = require('web3-provider-engine');
 import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
 import { EmptyWalletSubprovider, FakeGasEstimateSubprovider, GanacheSubprovider } from '@0xproject/subproviders';
-import { Provider } from '@0xproject/types';
+import { Provider } from 'ethereum-types';
 import * as fs from 'fs';
 import * as _ from 'lodash';
 import * as process from 'process';
diff --git a/packages/dev-utils/test/blockchain_lifecycle_test.ts b/packages/dev-utils/test/blockchain_lifecycle_test.ts
index 857a6b50e..3d7d2e0ef 100644
--- a/packages/dev-utils/test/blockchain_lifecycle_test.ts
+++ b/packages/dev-utils/test/blockchain_lifecycle_test.ts
@@ -1,6 +1,6 @@
-import { BlockParamLiteral } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
+import { BlockParamLiteral } from 'ethereum-types';
 import 'make-promises-safe';
 import 'mocha';
 
diff --git a/packages/dev-utils/test/rpc_test.ts b/packages/dev-utils/test/rpc_test.ts
index 45d1226c2..cff946e23 100644
--- a/packages/dev-utils/test/rpc_test.ts
+++ b/packages/dev-utils/test/rpc_test.ts
@@ -1,6 +1,6 @@
-import { BlockParamLiteral } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
+import { BlockParamLiteral } from 'ethereum-types';
 import 'make-promises-safe';
 import 'mocha';
 
diff --git a/packages/ethereum-types/.npmignore b/packages/ethereum-types/.npmignore
new file mode 100644
index 000000000..24e65ad5b
--- /dev/null
+++ b/packages/ethereum-types/.npmignore
@@ -0,0 +1,6 @@
+.*
+yarn-error.log
+/scripts/
+/src/
+tsconfig.json
+/lib/monorepo_scripts/
diff --git a/packages/ethereum-types/CHANGELOG.json b/packages/ethereum-types/CHANGELOG.json
new file mode 100644
index 000000000..67eac5111
--- /dev/null
+++ b/packages/ethereum-types/CHANGELOG.json
@@ -0,0 +1,10 @@
+[
+    {
+        "version": "0.0.1",
+        "changes": [
+            {
+                "note": "Initial publish"
+            }
+        ]
+    }
+]
diff --git a/packages/ethereum-types/README.md b/packages/ethereum-types/README.md
new file mode 100644
index 000000000..817e22d15
--- /dev/null
+++ b/packages/ethereum-types/README.md
@@ -0,0 +1,61 @@
+## ethereum-types
+
+Typescript types shared across Ethereum-related packages/libraries/tools.
+
+## Installation
+
+```bash
+yarn add -D ethereum-types
+```
+
+## Usage
+
+```javascript
+import { TransactionReceipt, TxData, TxDataPayable } from 'ethereum-types';
+```
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=ethereum-types yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=ethereum-types yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
diff --git a/packages/ethereum-types/package.json b/packages/ethereum-types/package.json
new file mode 100644
index 000000000..c7a748f70
--- /dev/null
+++ b/packages/ethereum-types/package.json
@@ -0,0 +1,42 @@
+{
+    "name": "ethereum-types",
+    "version": "0.0.1",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Ethereum types",
+    "main": "lib/index.js",
+    "types": "lib/index.d.ts",
+    "scripts": {
+        "watch": "tsc -w",
+        "build": "tsc && copyfiles -u 2 './lib/monorepo_scripts/**/*' ./scripts",
+        "clean": "shx rm -rf lib scripts",
+        "lint": "tslint --project .",
+        "manual:postpublish": "yarn build; node ./scripts/postpublish.js"
+    },
+    "license": "Apache-2.0",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo.git"
+    },
+    "bugs": {
+        "url": "https://github.com/0xProject/0x-monorepo/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x-monorepo/packages/types/README.md",
+    "devDependencies": {
+        "@0xproject/monorepo-scripts": "^0.1.20",
+        "@0xproject/tslint-config": "^0.4.18",
+        "copyfiles": "^1.2.0",
+        "make-promises-safe": "^1.1.0",
+        "shx": "^0.2.2",
+        "tslint": "5.8.0",
+        "typescript": "2.7.1"
+    },
+    "dependencies": {
+        "@types/node": "^8.0.53",
+        "bignumber.js": "~4.1.0"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}
diff --git a/packages/ethereum-types/src/globals.d.ts b/packages/ethereum-types/src/globals.d.ts
new file mode 100644
index 000000000..94e63a32d
--- /dev/null
+++ b/packages/ethereum-types/src/globals.d.ts
@@ -0,0 +1,6 @@
+declare module '*.json' {
+    const json: any;
+    /* tslint:disable */
+    export default json;
+    /* tslint:enable */
+}
diff --git a/packages/ethereum-types/src/index.ts b/packages/ethereum-types/src/index.ts
new file mode 100644
index 000000000..f00ae963a
--- /dev/null
+++ b/packages/ethereum-types/src/index.ts
@@ -0,0 +1,281 @@
+import { BigNumber } from 'bignumber.js';
+
+export type JSONRPCErrorCallback = (err: Error | null, result?: JSONRPCResponsePayload) => void;
+
+/**
+ * Do not create your own provider. Use an existing provider from a Web3 or ProviderEngine library
+ * Read more about Providers in the 0x wiki.
+ */
+export interface Provider {
+    sendAsync(payload: JSONRPCRequestPayload, callback: JSONRPCErrorCallback): void;
+}
+
+export type ContractAbi = AbiDefinition[];
+
+export type AbiDefinition = FunctionAbi | EventAbi;
+
+export type FunctionAbi = MethodAbi | ConstructorAbi | FallbackAbi;
+
+export type ConstructorStateMutability = 'nonpayable' | 'payable';
+export type StateMutability = 'pure' | 'view' | ConstructorStateMutability;
+
+export interface MethodAbi {
+    type: AbiType.Function;
+    name: string;
+    inputs: DataItem[];
+    outputs: DataItem[];
+    constant: boolean;
+    stateMutability: StateMutability;
+    payable: boolean;
+}
+
+export interface ConstructorAbi {
+    type: AbiType.Constructor;
+    inputs: DataItem[];
+    payable: boolean;
+    stateMutability: ConstructorStateMutability;
+}
+
+export interface FallbackAbi {
+    type: AbiType.Fallback;
+    payable: boolean;
+}
+
+export interface EventParameter extends DataItem {
+    indexed: boolean;
+}
+
+export interface EventAbi {
+    type: AbiType.Event;
+    name: string;
+    inputs: EventParameter[];
+    anonymous: boolean;
+}
+
+export interface DataItem {
+    name: string;
+    type: string;
+    components?: DataItem[];
+}
+
+export enum OpCode {
+    DelegateCall = 'DELEGATECALL',
+    Revert = 'REVERT',
+    Create = 'CREATE',
+    Stop = 'STOP',
+    Invalid = 'INVALID',
+    CallCode = 'CALLCODE',
+    StaticCall = 'STATICCALL',
+    Return = 'RETURN',
+    Call = 'CALL',
+    SelfDestruct = 'SELFDESTRUCT',
+}
+
+export interface StructLog {
+    depth: number;
+    error: string;
+    gas: number;
+    gasCost: number;
+    memory: string[];
+    op: OpCode;
+    pc: number;
+    stack: string[];
+    storage: { [location: string]: string };
+}
+
+export interface TransactionTrace {
+    gas: number;
+    returnValue: any;
+    structLogs: StructLog[];
+}
+
+export type Unit =
+    | 'kwei'
+    | 'ada'
+    | 'mwei'
+    | 'babbage'
+    | 'gwei'
+    | 'shannon'
+    | 'szabo'
+    | 'finney'
+    | 'ether'
+    | 'kether'
+    | 'grand'
+    | 'einstein'
+    | 'mether'
+    | 'gether'
+    | 'tether';
+
+export interface JSONRPCRequestPayload {
+    params: any[];
+    method: string;
+    id: number;
+    jsonrpc: string;
+}
+
+export interface JSONRPCResponsePayload {
+    result: any;
+    id: number;
+    jsonrpc: string;
+}
+
+export interface AbstractBlock {
+    number: number | null;
+    hash: string | null;
+    parentHash: string;
+    nonce: string | null;
+    sha3Uncles: string;
+    logsBloom: string | null;
+    transactionsRoot: string;
+    stateRoot: string;
+    miner: string;
+    difficulty: BigNumber;
+    totalDifficulty: BigNumber;
+    extraData: string;
+    size: number;
+    gasLimit: number;
+    gasUsed: number;
+    timestamp: number;
+    uncles: string[];
+}
+
+export interface BlockWithoutTransactionData extends AbstractBlock {
+    transactions: string[];
+}
+
+export interface BlockWithTransactionData extends AbstractBlock {
+    transactions: Transaction[];
+}
+
+export interface Transaction {
+    hash: string;
+    nonce: number;
+    blockHash: string | null;
+    blockNumber: number | null;
+    transactionIndex: number | null;
+    from: string;
+    to: string | null;
+    value: BigNumber;
+    gasPrice: BigNumber;
+    gas: number;
+    input: string;
+}
+
+export interface CallTxDataBase {
+    to?: string;
+    value?: number | string | BigNumber;
+    gas?: number | string | BigNumber;
+    gasPrice?: number | string | BigNumber;
+    data?: string;
+    nonce?: number;
+}
+
+export interface TxData extends CallTxDataBase {
+    from: string;
+}
+
+export interface CallData extends CallTxDataBase {
+    from?: string;
+}
+
+export interface FilterObject {
+    fromBlock?: number | string;
+    toBlock?: number | string;
+    address?: string;
+    topics?: LogTopic[];
+}
+
+export type LogTopic = null | string | string[];
+
+export interface DecodedLogEntry<A> extends LogEntry {
+    event: string;
+    args: A;
+}
+
+export interface DecodedLogEntryEvent<A> extends DecodedLogEntry<A> {
+    removed: boolean;
+}
+
+export interface LogEntryEvent extends LogEntry {
+    removed: boolean;
+}
+
+export interface LogEntry {
+    logIndex: number | null;
+    transactionIndex: number | null;
+    transactionHash: string;
+    blockHash: string | null;
+    blockNumber: number | null;
+    address: string;
+    data: string;
+    topics: string[];
+}
+
+export interface TxDataPayable extends TxData {
+    value?: BigNumber;
+}
+
+export interface TransactionReceipt {
+    blockHash: string;
+    blockNumber: number;
+    transactionHash: string;
+    transactionIndex: number;
+    from: string;
+    to: string;
+    status: null | string | 0 | 1;
+    cumulativeGasUsed: number;
+    gasUsed: number;
+    contractAddress: string | null;
+    logs: LogEntry[];
+}
+
+export enum AbiType {
+    Function = 'function',
+    Constructor = 'constructor',
+    Event = 'event',
+    Fallback = 'fallback',
+}
+
+export type ContractEventArg = string | BigNumber | number | boolean;
+
+export interface DecodedLogArgs {
+    [argName: string]: ContractEventArg;
+}
+
+export interface LogWithDecodedArgs<ArgsType extends DecodedLogArgs> extends DecodedLogEntry<ArgsType> {}
+export type RawLog = LogEntry;
+
+export enum BlockParamLiteral {
+    Earliest = 'earliest',
+    Latest = 'latest',
+    Pending = 'pending',
+}
+
+export type BlockParam = BlockParamLiteral | number;
+
+export interface RawLogEntry {
+    logIndex: string | null;
+    transactionIndex: string | null;
+    transactionHash: string;
+    blockHash: string | null;
+    blockNumber: string | null;
+    address: string;
+    data: string;
+    topics: string[];
+}
+
+export enum SolidityTypes {
+    Address = 'address',
+    Uint256 = 'uint256',
+    Uint8 = 'uint8',
+    Uint = 'uint',
+}
+
+/**
+ * Contains the logs returned by a TransactionReceipt. We attempt to decode the
+ * logs using AbiDecoder. If we have the logs corresponding ABI, we decode it,
+ * otherwise we don't.
+ */
+export interface TransactionReceiptWithDecodedLogs extends TransactionReceipt {
+    logs: Array<LogWithDecodedArgs<DecodedLogArgs> | LogEntry>;
+}
diff --git a/packages/ethereum-types/src/monorepo_scripts/postpublish.ts b/packages/ethereum-types/src/monorepo_scripts/postpublish.ts
new file mode 100644
index 000000000..dcb99d0f7
--- /dev/null
+++ b/packages/ethereum-types/src/monorepo_scripts/postpublish.ts
@@ -0,0 +1,8 @@
+import { postpublishUtils } from '@0xproject/monorepo-scripts';
+
+import * as packageJSON from '../package.json';
+import * as tsConfigJSON from '../tsconfig.json';
+
+const cwd = `${__dirname}/..`;
+// tslint:disable-next-line:no-floating-promises
+postpublishUtils.runAsync(packageJSON, tsConfigJSON, cwd);
diff --git a/packages/ethereum-types/tsconfig.json b/packages/ethereum-types/tsconfig.json
new file mode 100644
index 000000000..82a45ea94
--- /dev/null
+++ b/packages/ethereum-types/tsconfig.json
@@ -0,0 +1,8 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "typeRoots": ["../../node_modules/@types"],
+        "outDir": "lib"
+    },
+    "include": ["src/**/*"]
+}
diff --git a/packages/ethereum-types/tslint.json b/packages/ethereum-types/tslint.json
new file mode 100644
index 000000000..ffaefe83a
--- /dev/null
+++ b/packages/ethereum-types/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": ["@0xproject/tslint-config"]
+}
diff --git a/packages/metacoin/test/metacoin_test.ts b/packages/metacoin/test/metacoin_test.ts
index 034c1265e..c561f8b7f 100644
--- a/packages/metacoin/test/metacoin_test.ts
+++ b/packages/metacoin/test/metacoin_test.ts
@@ -1,6 +1,6 @@
 import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils';
 import { ContractArtifact } from '@0xproject/sol-compiler';
-import { LogWithDecodedArgs } from '@0xproject/types';
+import { LogWithDecodedArgs } from 'ethereum-types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
diff --git a/packages/migrations/src/migrate.ts b/packages/migrations/src/migrate.ts
index 49b4e897c..0630bb0c4 100644
--- a/packages/migrations/src/migrate.ts
+++ b/packages/migrations/src/migrate.ts
@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 import { devConstants, web3Factory } from '@0xproject/dev-utils';
-import { Provider } from '@0xproject/types';
+import { Provider } from 'ethereum-types';
 import { logUtils } from '@0xproject/utils';
 import * as path from 'path';
 import * as yargs from 'yargs';
diff --git a/packages/migrations/src/v1/migration.ts b/packages/migrations/src/v1/migration.ts
index 233339244..e419763cf 100644
--- a/packages/migrations/src/v1/migration.ts
+++ b/packages/migrations/src/v1/migration.ts
@@ -1,4 +1,4 @@
-import { Provider, TxData } from '@0xproject/types';
+import { Provider, TxData } from 'ethereum-types';
 import { BigNumber, NULL_BYTES } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
diff --git a/packages/migrations/src/v2/migration.ts b/packages/migrations/src/v2/migration.ts
index fd7223252..b9cb1d87f 100644
--- a/packages/migrations/src/v2/migration.ts
+++ b/packages/migrations/src/v2/migration.ts
@@ -1,4 +1,4 @@
-import { Provider, TxData } from '@0xproject/types';
+import { Provider, TxData } from 'ethereum-types';
 import { BigNumber, NULL_BYTES } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
diff --git a/packages/sol-compiler/package.json b/packages/sol-compiler/package.json
index a74e4ae3e..c719b751d 100644
--- a/packages/sol-compiler/package.json
+++ b/packages/sol-compiler/package.json
@@ -80,6 +80,7 @@
         "@0xproject/utils": "^0.6.2",
         "@0xproject/web3-wrapper": "^0.6.4",
         "@types/yargs": "^11.0.0",
+        "ethereum-types": "^0.0.1",
         "chalk": "^2.3.0",
         "ethereumjs-util": "^5.1.1",
         "isomorphic-fetch": "^2.2.1",
diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index 1d5bdb940..cfbf3614c 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -11,7 +11,7 @@ import {
     Resolver,
     URLResolver,
 } from '@0xproject/sol-resolver';
-import { ContractAbi } from '@0xproject/types';
+import { ContractAbi } from 'ethereum-types';
 import { logUtils, promisify } from '@0xproject/utils';
 import chalk from 'chalk';
 import * as ethUtil from 'ethereumjs-util';
diff --git a/packages/sol-compiler/src/utils/encoder.ts b/packages/sol-compiler/src/utils/encoder.ts
index 806efbbca..0f2d75691 100644
--- a/packages/sol-compiler/src/utils/encoder.ts
+++ b/packages/sol-compiler/src/utils/encoder.ts
@@ -1,4 +1,4 @@
-import { AbiDefinition, AbiType, ContractAbi, DataItem } from '@0xproject/types';
+import { AbiDefinition, AbiType, ContractAbi, DataItem } from 'ethereum-types';
 import * as _ from 'lodash';
 import * as web3Abi from 'web3-eth-abi';
 
diff --git a/packages/sol-compiler/src/utils/types.ts b/packages/sol-compiler/src/utils/types.ts
index d43347fa6..759a7a555 100644
--- a/packages/sol-compiler/src/utils/types.ts
+++ b/packages/sol-compiler/src/utils/types.ts
@@ -1,4 +1,4 @@
-import { ContractAbi, Provider, TxData } from '@0xproject/types';
+import { ContractAbi, Provider, TxData } from 'ethereum-types';
 import * as solc from 'solc';
 import * as Web3 from 'web3';
 import * as yargs from 'yargs';
diff --git a/packages/sol-compiler/test/util/provider.ts b/packages/sol-compiler/test/util/provider.ts
index 2bd178129..7215ffae7 100644
--- a/packages/sol-compiler/test/util/provider.ts
+++ b/packages/sol-compiler/test/util/provider.ts
@@ -1,5 +1,5 @@
 import { web3Factory } from '@0xproject/dev-utils';
-import { Provider } from '@0xproject/types';
+import { Provider } from 'ethereum-types';
 import * as Web3 from 'web3';
 
 const providerConfigs = { shouldUseInProcessGanache: true };
diff --git a/packages/sol-cov/package.json b/packages/sol-cov/package.json
index 67c570bd4..8f272a00c 100644
--- a/packages/sol-cov/package.json
+++ b/packages/sol-cov/package.json
@@ -48,9 +48,9 @@
     "dependencies": {
         "@0xproject/sol-compiler": "^0.5.0",
         "@0xproject/subproviders": "^0.10.2",
-        "@0xproject/types": "^0.7.0",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
+        "ethereum-types": "^0.0.1",
         "ethereumjs-util": "^5.1.1",
         "glob": "^7.1.2",
         "istanbul": "^0.4.5",
diff --git a/packages/sol-cov/src/coverage_subprovider.ts b/packages/sol-cov/src/coverage_subprovider.ts
index 438339a3f..ca7f4aed2 100644
--- a/packages/sol-cov/src/coverage_subprovider.ts
+++ b/packages/sol-cov/src/coverage_subprovider.ts
@@ -1,5 +1,5 @@
 import { Callback, ErrorCallback, NextCallback, Subprovider } from '@0xproject/subproviders';
-import { BlockParam, CallData, JSONRPCRequestPayload, TransactionTrace, TxData } from '@0xproject/types';
+import { BlockParam, CallData, JSONRPCRequestPayload, TransactionTrace, TxData } from 'ethereum-types';
 import * as fs from 'fs';
 import * as _ from 'lodash';
 import { Lock } from 'semaphore-async-await';
diff --git a/packages/sol-cov/src/trace.ts b/packages/sol-cov/src/trace.ts
index 6caea1610..0b725ead5 100644
--- a/packages/sol-cov/src/trace.ts
+++ b/packages/sol-cov/src/trace.ts
@@ -1,4 +1,4 @@
-import { OpCode, StructLog, TransactionTrace } from '@0xproject/types';
+import { OpCode, StructLog, TransactionTrace } from 'ethereum-types';
 import { addressUtils, BigNumber, logUtils } from '@0xproject/utils';
 import { addHexPrefix, stripHexPrefix } from 'ethereumjs-util';
 import * as fs from 'fs';
diff --git a/packages/sol-cov/test/trace_test.ts b/packages/sol-cov/test/trace_test.ts
index c140cba0d..b3a15e151 100644
--- a/packages/sol-cov/test/trace_test.ts
+++ b/packages/sol-cov/test/trace_test.ts
@@ -1,4 +1,4 @@
-import { OpCode, StructLog } from '@0xproject/types';
+import { OpCode, StructLog } from 'ethereum-types';
 import * as chai from 'chai';
 import * as fs from 'fs';
 import * as _ from 'lodash';
diff --git a/packages/subproviders/package.json b/packages/subproviders/package.json
index 67f0edb4b..e08b462f1 100644
--- a/packages/subproviders/package.json
+++ b/packages/subproviders/package.json
@@ -45,6 +45,7 @@
         "@0xproject/utils": "^0.6.2",
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "@ledgerhq/hw-transport-u2f": "^4.3.0",
+        "ethereum-types": "^0.0.1",
         "bip39": "^2.5.0",
         "bn.js": "^4.11.8",
         "ethereumjs-tx": "^1.3.3",
diff --git a/packages/subproviders/src/subproviders/base_wallet_subprovider.ts b/packages/subproviders/src/subproviders/base_wallet_subprovider.ts
index a04be68e1..395d393d2 100644
--- a/packages/subproviders/src/subproviders/base_wallet_subprovider.ts
+++ b/packages/subproviders/src/subproviders/base_wallet_subprovider.ts
@@ -1,5 +1,5 @@
 import { assert } from '@0xproject/assert';
-import { JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types';
+import { JSONRPCRequestPayload, JSONRPCResponsePayload } from 'ethereum-types';
 import { addressUtils } from '@0xproject/utils';
 import * as _ from 'lodash';
 
diff --git a/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts b/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts
index bd7a4b6d9..4268c67bd 100644
--- a/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts
+++ b/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts
@@ -1,4 +1,4 @@
-import { JSONRPCRequestPayload } from '@0xproject/types';
+import { JSONRPCRequestPayload } from 'ethereum-types';
 
 import { Callback, ErrorCallback } from '../types';
 
diff --git a/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts b/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts
index 6c49f20cf..d750505e7 100644
--- a/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts
+++ b/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts
@@ -1,4 +1,4 @@
-import { JSONRPCRequestPayload } from '@0xproject/types';
+import { JSONRPCRequestPayload } from 'ethereum-types';
 
 import { Callback, ErrorCallback } from '../types';
 
diff --git a/packages/subproviders/src/subproviders/ganache.ts b/packages/subproviders/src/subproviders/ganache.ts
index 9ab764048..73d0513cc 100644
--- a/packages/subproviders/src/subproviders/ganache.ts
+++ b/packages/subproviders/src/subproviders/ganache.ts
@@ -1,4 +1,4 @@
-import { JSONRPCRequestPayload, Provider } from '@0xproject/types';
+import { JSONRPCRequestPayload, Provider } from 'ethereum-types';
 import * as Ganache from 'ganache-core';
 
 import { Callback, ErrorCallback } from '../types';
diff --git a/packages/subproviders/src/subproviders/injected_web3.ts b/packages/subproviders/src/subproviders/injected_web3.ts
index 73b870cd5..165c66d62 100644
--- a/packages/subproviders/src/subproviders/injected_web3.ts
+++ b/packages/subproviders/src/subproviders/injected_web3.ts
@@ -1,4 +1,4 @@
-import { JSONRPCRequestPayload, Provider } from '@0xproject/types';
+import { JSONRPCRequestPayload, Provider } from 'ethereum-types';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
diff --git a/packages/subproviders/src/subproviders/nonce_tracker.ts b/packages/subproviders/src/subproviders/nonce_tracker.ts
index 345e5e975..98773e79c 100644
--- a/packages/subproviders/src/subproviders/nonce_tracker.ts
+++ b/packages/subproviders/src/subproviders/nonce_tracker.ts
@@ -1,6 +1,6 @@
 import * as _ from 'lodash';
 
-import { BlockParamLiteral, JSONRPCRequestPayload } from '@0xproject/types';
+import { BlockParamLiteral, JSONRPCRequestPayload } from 'ethereum-types';
 import EthereumTx = require('ethereumjs-tx');
 import ethUtil = require('ethereumjs-util');
 import providerEngineUtils = require('web3-provider-engine/util/rpc-cache-utils');
diff --git a/packages/subproviders/src/subproviders/redundant_subprovider.ts b/packages/subproviders/src/subproviders/redundant_subprovider.ts
index 37c8bba5a..a60d6706e 100644
--- a/packages/subproviders/src/subproviders/redundant_subprovider.ts
+++ b/packages/subproviders/src/subproviders/redundant_subprovider.ts
@@ -1,5 +1,5 @@
-import { JSONRPCRequestPayload } from '@0xproject/types';
 import { promisify } from '@0xproject/utils';
+import { JSONRPCRequestPayload } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { Callback } from '../types';
diff --git a/packages/subproviders/src/subproviders/subprovider.ts b/packages/subproviders/src/subproviders/subprovider.ts
index cb6dffc4a..6a0b159da 100644
--- a/packages/subproviders/src/subproviders/subprovider.ts
+++ b/packages/subproviders/src/subproviders/subprovider.ts
@@ -1,4 +1,4 @@
-import { JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types';
+import { JSONRPCRequestPayload, JSONRPCResponsePayload } from 'ethereum-types';
 import { promisify } from '@0xproject/utils';
 import * as Web3 from 'web3';
 
diff --git a/packages/subproviders/src/types.ts b/packages/subproviders/src/types.ts
index 30a3b4a4e..7a8413305 100644
--- a/packages/subproviders/src/types.ts
+++ b/packages/subproviders/src/types.ts
@@ -1,4 +1,5 @@
-import { ECSignature, JSONRPCRequestPayload } from '@0xproject/types';
+import { ECSignature } from '@0xproject/types';
+import { JSONRPCRequestPayload } from 'ethereum-types';
 import HDNode = require('hdkey');
 import * as _ from 'lodash';
 
diff --git a/packages/subproviders/test/integration/ledger_subprovider_test.ts b/packages/subproviders/test/integration/ledger_subprovider_test.ts
index d3e9d0fde..315dfa894 100644
--- a/packages/subproviders/test/integration/ledger_subprovider_test.ts
+++ b/packages/subproviders/test/integration/ledger_subprovider_test.ts
@@ -1,10 +1,11 @@
-import { DoneCallback, JSONRPCResponsePayload } from '@0xproject/types';
+import { DoneCallback } from '@0xproject/types';
 import { promisify } from '@0xproject/utils';
 import Eth from '@ledgerhq/hw-app-eth';
 // HACK: This dependency is optional and tslint skips optional dependencies
 // tslint:disable-next-line:no-implicit-dependencies
 import TransportNodeHid from '@ledgerhq/hw-transport-node-hid';
 import * as chai from 'chai';
+import { JSONRPCResponsePayload } from 'ethereum-types';
 import * as ethUtils from 'ethereumjs-util';
 import * as _ from 'lodash';
 import 'make-promises-safe';
diff --git a/packages/subproviders/test/unit/ledger_subprovider_test.ts b/packages/subproviders/test/unit/ledger_subprovider_test.ts
index 8571f7d11..17e72a694 100644
--- a/packages/subproviders/test/unit/ledger_subprovider_test.ts
+++ b/packages/subproviders/test/unit/ledger_subprovider_test.ts
@@ -1,5 +1,5 @@
-import { JSONRPCResponsePayload } from '@0xproject/types';
 import * as chai from 'chai';
+import { JSONRPCResponsePayload } from 'ethereum-types';
 import * as ethUtils from 'ethereumjs-util';
 import * as _ from 'lodash';
 import 'make-promises-safe';
diff --git a/packages/subproviders/test/unit/mnemonic_wallet_subprovider_test.ts b/packages/subproviders/test/unit/mnemonic_wallet_subprovider_test.ts
index 90565181e..fba221af0 100644
--- a/packages/subproviders/test/unit/mnemonic_wallet_subprovider_test.ts
+++ b/packages/subproviders/test/unit/mnemonic_wallet_subprovider_test.ts
@@ -1,5 +1,5 @@
-import { JSONRPCResponsePayload } from '@0xproject/types';
 import * as chai from 'chai';
+import { JSONRPCResponsePayload } from 'ethereum-types';
 import * as ethUtils from 'ethereumjs-util';
 import * as _ from 'lodash';
 import 'make-promises-safe';
diff --git a/packages/subproviders/test/unit/private_key_wallet_subprovider_test.ts b/packages/subproviders/test/unit/private_key_wallet_subprovider_test.ts
index 864f977ea..ac88d8cac 100644
--- a/packages/subproviders/test/unit/private_key_wallet_subprovider_test.ts
+++ b/packages/subproviders/test/unit/private_key_wallet_subprovider_test.ts
@@ -1,5 +1,5 @@
-import { JSONRPCResponsePayload } from '@0xproject/types';
 import * as chai from 'chai';
+import { JSONRPCResponsePayload } from 'ethereum-types';
 import * as ethUtils from 'ethereumjs-util';
 import * as _ from 'lodash';
 import 'make-promises-safe';
diff --git a/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts b/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts
index fdbbb332c..fcfec1367 100644
--- a/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts
+++ b/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts
@@ -1,5 +1,6 @@
-import { DoneCallback, JSONRPCResponsePayload } from '@0xproject/types';
+import { DoneCallback } from '@0xproject/types';
 import * as chai from 'chai';
+import { JSONRPCResponsePayload } from 'ethereum-types';
 import * as _ from 'lodash';
 import 'make-promises-safe';
 import Web3 = require('web3');
diff --git a/packages/testnet-faucets/package.json b/packages/testnet-faucets/package.json
index c565d5b7d..06f8d3e84 100644
--- a/packages/testnet-faucets/package.json
+++ b/packages/testnet-faucets/package.json
@@ -20,7 +20,6 @@
     "dependencies": {
         "0x.js": "^0.38.0",
         "@0xproject/subproviders": "^0.10.2",
-        "@0xproject/types": "^0.7.0",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
         "body-parser": "^1.17.1",
@@ -37,6 +36,7 @@
         "@types/body-parser": "^1.16.1",
         "@types/express": "^4.0.35",
         "@types/lodash": "4.14.104",
+        "ethereum-types": "^0.0.1",
         "awesome-typescript-loader": "^3.1.3",
         "gulp": "^3.9.1",
         "make-promises-safe": "^1.1.0",
diff --git a/packages/testnet-faucets/src/ts/handler.ts b/packages/testnet-faucets/src/ts/handler.ts
index d5f0dc2f9..3a105742e 100644
--- a/packages/testnet-faucets/src/ts/handler.ts
+++ b/packages/testnet-faucets/src/ts/handler.ts
@@ -1,6 +1,6 @@
 import { Order, SignedOrder, ZeroEx } from '0x.js';
-import { Provider } from '@0xproject/types';
 import { BigNumber, logUtils } from '@0xproject/utils';
+import { Provider } from 'ethereum-types';
 import * as express from 'express';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
diff --git a/packages/types/package.json b/packages/types/package.json
index d9afe5afc..376eb1d68 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -34,7 +34,8 @@
     },
     "dependencies": {
         "@types/node": "^8.0.53",
-        "bignumber.js": "~4.1.0"
+        "bignumber.js": "~4.1.0",
+        "ethereum-types": "^0.0.1"
     },
     "publishConfig": {
         "access": "public"
diff --git a/packages/types/src/index.ts b/packages/types/src/index.ts
index 7831f580e..47f3e3239 100644
--- a/packages/types/src/index.ts
+++ b/packages/types/src/index.ts
@@ -1,285 +1,5 @@
 import { BigNumber } from 'bignumber.js';
-
-export type JSONRPCErrorCallback = (err: Error | null, result?: JSONRPCResponsePayload) => void;
-
-/**
- * Do not create your own provider. Use an existing provider from a Web3 or ProviderEngine library
- * Read more about Providers in the 0x wiki.
- */
-export interface Provider {
-    sendAsync(payload: JSONRPCRequestPayload, callback: JSONRPCErrorCallback): void;
-}
-
-export type ContractAbi = AbiDefinition[];
-
-export type AbiDefinition = FunctionAbi | EventAbi;
-
-export type FunctionAbi = MethodAbi | ConstructorAbi | FallbackAbi;
-
-export type ConstructorStateMutability = 'nonpayable' | 'payable';
-export type StateMutability = 'pure' | 'view' | ConstructorStateMutability;
-
-export interface MethodAbi {
-    type: AbiType.Function;
-    name: string;
-    inputs: DataItem[];
-    outputs: DataItem[];
-    constant: boolean;
-    stateMutability: StateMutability;
-    payable: boolean;
-}
-
-export interface ConstructorAbi {
-    type: AbiType.Constructor;
-    inputs: DataItem[];
-    payable: boolean;
-    stateMutability: ConstructorStateMutability;
-}
-
-export interface FallbackAbi {
-    type: AbiType.Fallback;
-    payable: boolean;
-}
-
-export interface EventParameter extends DataItem {
-    indexed: boolean;
-}
-
-export interface EventAbi {
-    type: AbiType.Event;
-    name: string;
-    inputs: EventParameter[];
-    anonymous: boolean;
-}
-
-export interface DataItem {
-    name: string;
-    type: string;
-    components?: DataItem[];
-}
-
-export enum OpCode {
-    DelegateCall = 'DELEGATECALL',
-    Revert = 'REVERT',
-    Create = 'CREATE',
-    Stop = 'STOP',
-    Invalid = 'INVALID',
-    CallCode = 'CALLCODE',
-    StaticCall = 'STATICCALL',
-    Return = 'RETURN',
-    Call = 'CALL',
-    SelfDestruct = 'SELFDESTRUCT',
-}
-
-export interface StructLog {
-    depth: number;
-    error: string;
-    gas: number;
-    gasCost: number;
-    memory: string[];
-    op: OpCode;
-    pc: number;
-    stack: string[];
-    storage: { [location: string]: string };
-}
-
-export interface TransactionTrace {
-    gas: number;
-    returnValue: any;
-    structLogs: StructLog[];
-}
-
-export type Unit =
-    | 'kwei'
-    | 'ada'
-    | 'mwei'
-    | 'babbage'
-    | 'gwei'
-    | 'shannon'
-    | 'szabo'
-    | 'finney'
-    | 'ether'
-    | 'kether'
-    | 'grand'
-    | 'einstein'
-    | 'mether'
-    | 'gether'
-    | 'tether';
-
-export interface JSONRPCRequestPayload {
-    params: any[];
-    method: string;
-    id: number;
-    jsonrpc: string;
-}
-
-export interface JSONRPCResponsePayload {
-    result: any;
-    id: number;
-    jsonrpc: string;
-}
-
-export interface AbstractBlock {
-    number: number | null;
-    hash: string | null;
-    parentHash: string;
-    nonce: string | null;
-    sha3Uncles: string;
-    logsBloom: string | null;
-    transactionsRoot: string;
-    stateRoot: string;
-    miner: string;
-    difficulty: BigNumber;
-    totalDifficulty: BigNumber;
-    extraData: string;
-    size: number;
-    gasLimit: number;
-    gasUsed: number;
-    timestamp: number;
-    uncles: string[];
-}
-
-export interface BlockWithoutTransactionData extends AbstractBlock {
-    transactions: string[];
-}
-
-export interface BlockWithTransactionData extends AbstractBlock {
-    transactions: Transaction[];
-}
-
-export interface Transaction {
-    hash: string;
-    nonce: number;
-    blockHash: string | null;
-    blockNumber: number | null;
-    transactionIndex: number | null;
-    from: string;
-    to: string | null;
-    value: BigNumber;
-    gasPrice: BigNumber;
-    gas: number;
-    input: string;
-}
-
-export interface CallTxDataBase {
-    to?: string;
-    value?: number | string | BigNumber;
-    gas?: number | string | BigNumber;
-    gasPrice?: number | string | BigNumber;
-    data?: string;
-    nonce?: number;
-}
-
-export interface TxData extends CallTxDataBase {
-    from: string;
-}
-
-export interface CallData extends CallTxDataBase {
-    from?: string;
-}
-
-export interface FilterObject {
-    fromBlock?: number | string;
-    toBlock?: number | string;
-    address?: string;
-    topics?: LogTopic[];
-}
-
-export type LogTopic = null | string | string[];
-
-export interface DecodedLogEntry<A> extends LogEntry {
-    event: string;
-    args: A;
-}
-
-export interface DecodedLogEntryEvent<A> extends DecodedLogEntry<A> {
-    removed: boolean;
-}
-
-export interface LogEntryEvent extends LogEntry {
-    removed: boolean;
-}
-
-export interface LogEntry {
-    logIndex: number | null;
-    transactionIndex: number | null;
-    transactionHash: string;
-    blockHash: string | null;
-    blockNumber: number | null;
-    address: string;
-    data: string;
-    topics: string[];
-}
-
-export interface TxDataPayable extends TxData {
-    value?: BigNumber;
-}
-
-export interface TransactionReceipt {
-    blockHash: string;
-    blockNumber: number;
-    transactionHash: string;
-    transactionIndex: number;
-    from: string;
-    to: string;
-    status: null | string | 0 | 1;
-    cumulativeGasUsed: number;
-    gasUsed: number;
-    contractAddress: string | null;
-    logs: LogEntry[];
-}
-
-export enum AbiType {
-    Function = 'function',
-    Constructor = 'constructor',
-    Event = 'event',
-    Fallback = 'fallback',
-}
-
-export type ContractEventArg = string | BigNumber | number;
-
-export interface DecodedLogArgs {
-    [argName: string]: ContractEventArg;
-}
-
-export interface LogWithDecodedArgs<ArgsType> extends DecodedLogEntry<ArgsType> {}
-export type RawLog = LogEntry;
-export enum SolidityTypes {
-    Address = 'address',
-    Uint256 = 'uint256',
-    Uint8 = 'uint8',
-    Uint = 'uint',
-}
-
-/**
- * Contains the logs returned by a TransactionReceipt. We attempt to decode the
- * logs using AbiDecoder. If we have the logs corresponding ABI, we decode it,
- * otherwise we don't.
- */
-export interface TransactionReceiptWithDecodedLogs extends TransactionReceipt {
-    logs: Array<LogWithDecodedArgs<DecodedLogArgs> | LogEntry>;
-}
-
-// Earliest is omitted by design. It is simply an alias for the `0` constant and
-// is thus not very helpful. Moreover, this type is used in places that only accept
-// `latest` or `pending`.
-export enum BlockParamLiteral {
-    Latest = 'latest',
-    Pending = 'pending',
-}
-
-export type BlockParam = BlockParamLiteral | number;
-
-export interface RawLogEntry {
-    logIndex: string | null;
-    transactionIndex: string | null;
-    transactionHash: string;
-    blockHash: string | null;
-    blockNumber: string | null;
-    address: string;
-    data: string;
-    topics: string[];
-}
+import { ContractAbi, DecodedLogArgs, LogEntry, LogWithDecodedArgs, TransactionReceipt } from 'ethereum-types';
 
 export interface Order {
     senderAddress: string;
diff --git a/packages/typescript-typings/package.json b/packages/typescript-typings/package.json
index 932f89ec5..4bae1f437 100644
--- a/packages/typescript-typings/package.json
+++ b/packages/typescript-typings/package.json
@@ -25,13 +25,12 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/typescript-typings#readme",
     "dependencies": {
-        "@0xproject/types": "^0.7.0",
+        "ethereum-types": "^0.0.1",
         "bignumber.js": "~4.1.0"
     },
     "devDependencies": {
         "@0xproject/monorepo-scripts": "^0.1.20",
         "copyfiles": "^1.2.0",
-        "make-promises-safe": "^1.1.0",
         "shx": "^0.2.2"
     },
     "publishConfig": {
diff --git a/packages/typescript-typings/types/ethers/index.d.ts b/packages/typescript-typings/types/ethers/index.d.ts
index addf85613..d40428a9b 100644
--- a/packages/typescript-typings/types/ethers/index.d.ts
+++ b/packages/typescript-typings/types/ethers/index.d.ts
@@ -1,5 +1,5 @@
 declare module 'ethers' {
-    import { TxData } from '@0xproject/types';
+    import { TxData } from 'ethereum-types';
 
     export interface TransactionDescription {
         name: string;
diff --git a/packages/typescript-typings/types/ganache-core/index.d.ts b/packages/typescript-typings/types/ganache-core/index.d.ts
index feeb5721e..84635038f 100644
--- a/packages/typescript-typings/types/ganache-core/index.d.ts
+++ b/packages/typescript-typings/types/ganache-core/index.d.ts
@@ -1,5 +1,5 @@
 declare module 'ganache-core' {
-    import { Provider } from '@0xproject/types';
+    import { Provider } from 'ethereum-types';
     export interface GanacheOpts {
         verbose?: boolean;
         logger?: {
diff --git a/packages/typescript-typings/types/solc/index.d.ts b/packages/typescript-typings/types/solc/index.d.ts
index 5a87ac267..571bae101 100644
--- a/packages/typescript-typings/types/solc/index.d.ts
+++ b/packages/typescript-typings/types/solc/index.d.ts
@@ -114,7 +114,7 @@ declare module 'solc' {
         message: string;
         formattedMessage?: string;
     }
-    import { ContractAbi } from '@0xproject/types';
+    import { ContractAbi } from 'ethereum-types';
     export interface StandardContractOutput {
         abi: ContractAbi;
         evm: {
diff --git a/packages/typescript-typings/types/truffle-hdwalet-provider/index.d.ts b/packages/typescript-typings/types/truffle-hdwalet-provider/index.d.ts
index af82557cb..007df61e0 100644
--- a/packages/typescript-typings/types/truffle-hdwalet-provider/index.d.ts
+++ b/packages/typescript-typings/types/truffle-hdwalet-provider/index.d.ts
@@ -1,5 +1,5 @@
 declare module 'truffle-hdwallet-provider' {
-    import { JSONRPCRequestPayload, JSONRPCResponsePayload, Provider } from '@0xproject/types';
+    import { JSONRPCRequestPayload, JSONRPCResponsePayload, Provider } from 'ethereum-types';
     class HDWalletProvider implements Provider {
         constructor(mnemonic: string, rpcUrl: string);
         public sendAsync(
diff --git a/packages/typescript-typings/types/web3-provider-engine/index.d.ts b/packages/typescript-typings/types/web3-provider-engine/index.d.ts
index 8d5aef749..1733f2731 100644
--- a/packages/typescript-typings/types/web3-provider-engine/index.d.ts
+++ b/packages/typescript-typings/types/web3-provider-engine/index.d.ts
@@ -1,5 +1,5 @@
 declare module 'web3-provider-engine' {
-    import { Provider, JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types';
+    import { Provider, JSONRPCRequestPayload, JSONRPCResponsePayload } from 'ethereum-types';
     class Web3ProviderEngine implements Provider {
         public on(event: string, handler: () => void): void;
         public send(payload: JSONRPCRequestPayload): void;
@@ -23,7 +23,7 @@ declare module 'web3-provider-engine/subproviders/subprovider' {
     export = Subprovider;
 }
 declare module 'web3-provider-engine/subproviders/rpc' {
-    import { JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types';
+    import { JSONRPCRequestPayload, JSONRPCResponsePayload } from 'ethereum-types';
     class RpcSubprovider {
         constructor(options: { rpcUrl: string });
         public handleRequest(
@@ -41,7 +41,7 @@ declare module 'web3-provider-engine/util/rpc-cache-utils' {
     export = ProviderEngineRpcUtils;
 }
 declare module 'web3-provider-engine/subproviders/fixture' {
-    import { JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types';
+    import { JSONRPCRequestPayload, JSONRPCResponsePayload } from 'ethereum-types';
     class FixtureSubprovider {
         constructor(staticResponses: any);
         public handleRequest(
diff --git a/packages/typescript-typings/types/web3/index.d.ts b/packages/typescript-typings/types/web3/index.d.ts
index 15e7575a8..4085c71a7 100644
--- a/packages/typescript-typings/types/web3/index.d.ts
+++ b/packages/typescript-typings/types/web3/index.d.ts
@@ -16,7 +16,7 @@ declare module 'web3' {
         LogEntryEvent,
         JSONRPCRequestPayload,
         JSONRPCResponsePayload,
-    } from '@0xproject/types';
+    } from 'ethereum-types';
 
     type MixedData = string | number | object | any[] | BigNumber.BigNumber;
 
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 24551dd93..89daadbec 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -35,7 +35,7 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/types": "^0.7.0",
+        "ethereum-types": "^0.0.1",
         "@0xproject/typescript-typings": "^0.3.2",
         "@types/node": "^8.0.53",
         "ethereumjs-util": "^5.1.1",
diff --git a/packages/utils/src/abi_decoder.ts b/packages/utils/src/abi_decoder.ts
index d2d8364ca..ed3297ee1 100644
--- a/packages/utils/src/abi_decoder.ts
+++ b/packages/utils/src/abi_decoder.ts
@@ -8,7 +8,7 @@ import {
     LogWithDecodedArgs,
     RawLog,
     SolidityTypes,
-} from '@0xproject/types';
+} from 'ethereum-types';
 import * as ethers from 'ethers';
 import * as _ from 'lodash';
 
@@ -22,7 +22,7 @@ export class AbiDecoder {
         _.forEach(abiArrays, this.addABI.bind(this));
     }
     // This method can only decode logs from the 0x & ERC20 smart contracts
-    public tryToDecodeLogOrNoop<ArgsType>(log: LogEntry): LogWithDecodedArgs<ArgsType> | RawLog {
+    public tryToDecodeLogOrNoop<ArgsType extends DecodedLogArgs>(log: LogEntry): LogWithDecodedArgs<ArgsType> | RawLog {
         const methodId = log.topics[0];
         const event = this._methodIds[methodId];
         if (_.isUndefined(event)) {
diff --git a/packages/utils/src/abi_utils.ts b/packages/utils/src/abi_utils.ts
index c4533d42e..b5822425c 100644
--- a/packages/utils/src/abi_utils.ts
+++ b/packages/utils/src/abi_utils.ts
@@ -1,4 +1,4 @@
-import { AbiDefinition, AbiType, ConstructorAbi, ContractAbi, DataItem, MethodAbi } from '@0xproject/types';
+import { AbiDefinition, AbiType, ConstructorAbi, ContractAbi, DataItem, MethodAbi } from 'ethereum-types';
 import * as _ from 'lodash';
 
 export const abiUtils = {
diff --git a/packages/web3-wrapper/package.json b/packages/web3-wrapper/package.json
index 18bbf14a0..a633bd674 100644
--- a/packages/web3-wrapper/package.json
+++ b/packages/web3-wrapper/package.json
@@ -62,9 +62,9 @@
         "typescript": "2.7.1"
     },
     "dependencies": {
-        "@0xproject/types": "^0.7.0",
         "@0xproject/typescript-typings": "^0.3.2",
         "@0xproject/utils": "^0.6.2",
+        "ethereum-types": "^0.0.1",
         "ethers": "^3.0.15",
         "lodash": "^4.17.4",
         "web3": "^0.20.0"
diff --git a/packages/web3-wrapper/src/web3_wrapper.ts b/packages/web3-wrapper/src/web3_wrapper.ts
index 40a554522..32d03777c 100644
--- a/packages/web3-wrapper/src/web3_wrapper.ts
+++ b/packages/web3-wrapper/src/web3_wrapper.ts
@@ -12,7 +12,7 @@ import {
     TransactionReceipt,
     TransactionReceiptWithDecodedLogs,
     TxData,
-} from '@0xproject/types';
+} from 'ethereum-types';
 import { AbiDecoder, addressUtils, BigNumber, intervalUtils, promisify } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';