Allow users to specify the contracts backend in abi-gen

9 files changed, 92 insertions, 32 deletions

diff --git a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
index b313273b5..ad7727de5 100644
--- a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
@@ -108,10 +108,10 @@ export class ContractWrapper {
         const logWithDecodedArgs = this._abiDecoder.tryToDecodeLogOrNoop(log);
         return logWithDecodedArgs;
     }
-    protected async _instantiateContractIfExistsAsync(
+    protected async _getContractAbiAndAddressFromArtifactsAsync(
         artifact: Artifact,
         addressIfExists?: string,
-    ): Promise<Web3.ContractInstance> {
+    ): Promise<[Web3.ContractAbi, string]> {
         let contractAddress: string;
         if (_.isUndefined(addressIfExists)) {
             if (_.isUndefined(artifact.networks[this._networkId])) {
@@ -125,8 +125,8 @@ export class ContractWrapper {
         if (!doesContractExist) {
             throw new Error(CONTRACT_NAME_TO_NOT_FOUND_ERROR[artifact.contract_name]);
         }
-        const contractInstance = this._web3Wrapper.getContractInstance(artifact.abi, contractAddress);
-        return contractInstance;
+        const abiAndAddress: [Web3.ContractAbi, string] = [artifact.abi, contractAddress];
+        return abiAndAddress;
     }
     protected _getContractAddress(artifact: Artifact, addressIfExists?: string): string {
         if (_.isUndefined(addressIfExists)) {
diff --git a/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts b/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts
index 4807eff33..42f8213a2 100644
--- a/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts
@@ -187,11 +187,11 @@ export class EtherTokenWrapper extends ContractWrapper {
         if (!_.isUndefined(etherTokenContract)) {
             return etherTokenContract;
         }
-        const web3ContractInstance = await this._instantiateContractIfExistsAsync(
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
             artifacts.EtherTokenArtifact,
             etherTokenAddress,
         );
-        const contractInstance = new EtherTokenContract(web3ContractInstance, this._web3Wrapper.getContractDefaults());
+        const contractInstance = new EtherTokenContract(this._web3Wrapper, abi, address);
         etherTokenContract = contractInstance;
         this._etherTokenContractsByAddress[etherTokenAddress] = etherTokenContract;
         return etherTokenContract;
diff --git a/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts b/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
index 6bafc84c1..e0f6bd539 100644
--- a/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
@@ -858,7 +858,7 @@ export class ExchangeWrapper extends ContractWrapper {
         });
         if (!_.isUndefined(errLog)) {
             const logArgs = (errLog as LogWithDecodedArgs<LogErrorContractEventArgs>).args;
-            const errCode = logArgs.errorId.toNumber();
+            const errCode = logArgs.errorId;
             const errMessage = this._exchangeContractErrCodesToMsg[errCode];
             throw new Error(errMessage);
         }
@@ -906,11 +906,11 @@ export class ExchangeWrapper extends ContractWrapper {
         if (!_.isUndefined(this._exchangeContractIfExists)) {
             return this._exchangeContractIfExists;
         }
-        const web3ContractInstance = await this._instantiateContractIfExistsAsync(
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
             artifacts.ExchangeArtifact,
             this._contractAddressIfExists,
         );
-        const contractInstance = new ExchangeContract(web3ContractInstance, this._web3Wrapper.getContractDefaults());
+        const contractInstance = new ExchangeContract(this._web3Wrapper, abi, address);
         this._exchangeContractIfExists = contractInstance;
         return this._exchangeContractIfExists;
     }
diff --git a/packages/0x.js/src/contract_wrappers/generated/base_contract.ts b/packages/0x.js/src/contract_wrappers/generated/base_contract.ts
index d8fac7eea..a62c785bc 100644
--- a/packages/0x.js/src/contract_wrappers/generated/base_contract.ts
+++ b/packages/0x.js/src/contract_wrappers/generated/base_contract.ts
@@ -1,11 +1,45 @@
-import {TxData, TxDataPayable} from '@0xproject/types';
+import { TxData, TxDataPayable } from '@0xproject/types';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as ethersContracts from 'ethers-contracts';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
 export class BaseContract {
-    protected _web3ContractInstance: Web3.ContractInstance;
-    protected _defaults: Partial<TxData>;
-    protected async _applyDefaultsToTxDataAsync<T extends TxData|TxDataPayable>(
+    protected _ethersInterface: ethersContracts.Interface;
+    protected _web3Wrapper: Web3Wrapper;
+    protected _abi: Web3.ContractAbi;
+    protected _address: string;
+    protected static _transformABIData(
+        abis: Web3.DataItem[],
+        values: any[],
+        transformation: (type: string, value: any) => any,
+    ): any {
+        return _.map(values, (value: any, i: number) =>
+            BaseContract._transformTypedData(abis[i].type, value, transformation),
+        );
+    }
+    protected static _lowercaseAddress(type: string, value: string): string {
+        return type === 'address' ? value.toLowerCase() : value;
+    }
+    protected static _bigNumberToString(type: string, value: string): string {
+        return _.isObject(value) && (value as any).isBigNumber ? value.toString() : value;
+    }
+    private static _transformTypedData(
+        type: string,
+        values: any,
+        transformation: (type: string, value: any) => any,
+    ): any {
+        const trailingArrayRegex = /\[\d*\]$/;
+        if (type.match(trailingArrayRegex)) {
+            const arrayItemType = type.replace(trailingArrayRegex, '');
+            return _.map(values, (value: any, i: number) =>
+                this._transformTypedData(arrayItemType, value, transformation),
+            );
+        } else {
+            return transformation(type, values);
+        }
+    }
+    protected async _applyDefaultsToTxDataAsync<T extends Partial<TxData | TxDataPayable>>(
         txData: T,
         estimateGasAsync?: (txData: T) => Promise<number>,
     ): Promise<TxData> {
@@ -15,7 +49,8 @@ export class BaseContract {
         // 3. Gas estimate calculation + safety margin
         const removeUndefinedProperties = _.pickBy;
         const txDataWithDefaults = {
-            ...removeUndefinedProperties(this._defaults),
+            to: this._address,
+            ...removeUndefinedProperties(this._web3Wrapper.getContractDefaults()),
             ...removeUndefinedProperties(txData as any),
             // HACK: TS can't prove that T is spreadable.
             // Awaiting https://github.com/Microsoft/TypeScript/pull/13288 to be merged
@@ -26,8 +61,10 @@ export class BaseContract {
         }
         return txDataWithDefaults;
     }
-    constructor(web3ContractInstance: Web3.ContractInstance, defaults: Partial<TxData>) {
-        this._web3ContractInstance = web3ContractInstance;
-        this._defaults = defaults;
+    constructor(web3Wrapper: Web3Wrapper, abi: Web3.ContractAbi, address: string) {
+        this._web3Wrapper = web3Wrapper;
+        this._abi = abi;
+        this._address = address;
+        this._ethersInterface = new ethersContracts.Interface(abi);
     }
 }
diff --git a/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
index f0ae5f33c..e1806c6f2 100644
--- a/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
@@ -23,7 +23,7 @@ export class TokenRegistryWrapper extends ContractWrapper {
             address: metadata[0],
             name: metadata[1],
             symbol: metadata[2],
-            decimals: metadata[3].toNumber(),
+            decimals: metadata[3],
         };
         return token;
     }
@@ -50,7 +50,8 @@ export class TokenRegistryWrapper extends ContractWrapper {
     public async getTokenAddressesAsync(): Promise<string[]> {
         const tokenRegistryContract = await this._getTokenRegistryContractAsync();
         const addresses = await tokenRegistryContract.getTokenAddresses.callAsync();
-        return addresses;
+        const lowerCaseAddresses = _.map(addresses, address => address.toLowerCase());
+        return lowerCaseAddresses;
     }
     /**
      * Retrieves a token by address currently listed in the Token Registry smart contract
@@ -116,14 +117,11 @@ export class TokenRegistryWrapper extends ContractWrapper {
         if (!_.isUndefined(this._tokenRegistryContractIfExists)) {
             return this._tokenRegistryContractIfExists;
         }
-        const web3ContractInstance = await this._instantiateContractIfExistsAsync(
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
             artifacts.TokenRegistryArtifact,
             this._contractAddressIfExists,
         );
-        const contractInstance = new TokenRegistryContract(
-            web3ContractInstance,
-            this._web3Wrapper.getContractDefaults(),
-        );
+        const contractInstance = new TokenRegistryContract(this._web3Wrapper, abi, address);
         this._tokenRegistryContractIfExists = contractInstance;
         return this._tokenRegistryContractIfExists;
     }
diff --git a/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts
index f0cbf364d..211c7dfb4 100644
--- a/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts
@@ -59,14 +59,11 @@ export class TokenTransferProxyWrapper extends ContractWrapper {
         if (!_.isUndefined(this._tokenTransferProxyContractIfExists)) {
             return this._tokenTransferProxyContractIfExists;
         }
-        const web3ContractInstance = await this._instantiateContractIfExistsAsync(
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
             artifacts.TokenTransferProxyArtifact,
             this._contractAddressIfExists,
         );
-        const contractInstance = new TokenTransferProxyContract(
-            web3ContractInstance,
-            this._web3Wrapper.getContractDefaults(),
-        );
+        const contractInstance = new TokenTransferProxyContract(this._web3Wrapper, abi, address);
         this._tokenTransferProxyContractIfExists = contractInstance;
         return this._tokenTransferProxyContractIfExists;
     }
diff --git a/packages/0x.js/src/contract_wrappers/token_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_wrapper.ts
index 11a7670c0..0ec9ad707 100644
--- a/packages/0x.js/src/contract_wrappers/token_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_wrapper.ts
@@ -419,11 +419,11 @@ export class TokenWrapper extends ContractWrapper {
         if (!_.isUndefined(tokenContract)) {
             return tokenContract;
         }
-        const web3ContractInstance = await this._instantiateContractIfExistsAsync(
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
             artifacts.TokenArtifact,
             normalizedTokenAddress,
         );
-        const contractInstance = new TokenContract(web3ContractInstance, this._web3Wrapper.getContractDefaults());
+        const contractInstance = new TokenContract(this._web3Wrapper, abi, address);
         tokenContract = contractInstance;
         this._tokenContractsByAddress[normalizedTokenAddress] = tokenContract;
         return tokenContract;
diff --git a/packages/0x.js/src/globals.d.ts b/packages/0x.js/src/globals.d.ts
index 0e103d057..702f35149 100644
--- a/packages/0x.js/src/globals.d.ts
+++ b/packages/0x.js/src/globals.d.ts
@@ -41,3 +41,31 @@ declare module 'truffle-hdwallet-provider' {
     }
     export = HDWalletProvider;
 }
+
+declare module 'ethers-contracts' {
+    export interface TransactionDescription {
+        name: string;
+        signature: string;
+        sighash: string;
+        data: string;
+    }
+    export interface CallDescription extends TransactionDescription {
+        parse: (...args: any[]) => any;
+    }
+    export interface FunctionDescription {
+        (...params: any[]): TransactionDescription | CallDescription;
+        inputs: { names: string[]; types: string[] };
+        outputs: { names: string[]; types: string[] };
+    }
+    export interface EventDescription {
+        inputs: { names: string[]; types: string[] };
+        signature: string;
+        topic: string;
+    }
+    // tslint:disable-next-line:max-classes-per-file
+    export class Interface {
+        public functions: { [functionName: string]: FunctionDescription };
+        public events: { [eventName: string]: EventDescription };
+        constructor(abi: any);
+    }
+}
diff --git a/packages/0x.js/src/types.ts b/packages/0x.js/src/types.ts
index 0a3037258..2f17e30c2 100644
--- a/packages/0x.js/src/types.ts
+++ b/packages/0x.js/src/types.ts
@@ -127,7 +127,7 @@ export interface SignedOrder extends Order {
 }
 
 //                          [address, name, symbol, decimals, ipfsHash, swarmHash]
-export type TokenMetadata = [string, string, string, BigNumber, string, string];
+export type TokenMetadata = [string, string, string, number, string, string];
 
 export interface Token {
     name: string;