Add DocComments to Web3Wrapper

1 files changed, 132 insertions, 1 deletions

diff --git a/packages/web3-wrapper/src/index.ts b/packages/web3-wrapper/src/index.ts
index 975649a75..895df509a 100644
--- a/packages/web3-wrapper/src/index.ts
+++ b/packages/web3-wrapper/src/index.ts
@@ -3,12 +3,25 @@ import { BigNumber, promisify } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
+/**
+ * A wrapper around the Web3.js 0.x library that provides a consistent, clean promise-based interface.
+ */
 export class Web3Wrapper {
-    // This is here purely to reliably distinguish it from other objects in runtime (like BigNumber.isBigNumber)
+    /**
+     * This is here purely to reliably distinguish it from other objects in runtime
+     * Similar to: BigNumber.isBigNumber
+     */
     public isZeroExWeb3Wrapper = true;
     private _web3: Web3;
     private _defaults: Partial<TxData>;
     private _jsonRpcRequestId: number;
+    /**
+     * Instantiates a new Web3Wrapper.
+     * @param   provider    The Web3 provider instance you would like the Web3Wrapper to use for interacting with
+     *                      the Ethereum network.
+     * @param   defaults    Override TxData defaults sent with RPC requests to the backing Ethereum node.
+     * @return  An instance of the Web3Wrapper class.
+     */
     constructor(provider: Web3.Provider, defaults?: Partial<TxData>) {
         if (_.isUndefined((provider as any).sendAsync)) {
             // Web3@1.0 provider doesn't support synchronous http requests,
@@ -21,32 +34,69 @@ export class Web3Wrapper {
         this._defaults = defaults || {};
         this._jsonRpcRequestId = 0;
     }
+    /**
+     * Get the contract defaults set to the Web3Wrapper instance
+     * @return  TxData defaults (e.g gas, gasPrice, nonce, etc...)
+     */
     public getContractDefaults(): Partial<TxData> {
         return this._defaults;
     }
+    /**
+     * Retrieve the Web3 provider
+     * @return  Web3 provider instance
+     */
     public getProvider(): Web3.Provider {
         return this._web3.currentProvider;
     }
+    /**
+     * Update the used Web3 provider
+     * @param provider The new Web3 provider to be set
+     */
     public setProvider(provider: Web3.Provider) {
         this._web3.setProvider(provider);
     }
+    /**
+     * Check if an address is a valid Ethereum address
+     * @param address Address to check
+     * @returns Whether the address is a valid Ethereum address
+     */
     public isAddress(address: string): boolean {
         return this._web3.isAddress(address);
     }
+    /**
+     * Check whether an address is available through the backing provider. This can be
+     * useful if you want to know whether a user can sign messages or transactions from
+     * a given Ethereum address.
+     * @param senderAddress Address to check availability for
+     * @returns Whether the address is available through the provider.
+     */
     public async isSenderAddressAvailableAsync(senderAddress: string): Promise<boolean> {
         const addresses = await this.getAvailableAddressesAsync();
         const normalizedAddress = senderAddress.toLowerCase();
         return _.includes(addresses, normalizedAddress);
     }
+    /**
+     * Fetch the backing Ethereum node's version string e.g `MetaMask/v4.2.0`
+     * @returns Ethereum node's version string
+     */
     public async getNodeVersionAsync(): Promise<string> {
         const nodeVersion = await promisify<string>(this._web3.version.getNode)();
         return nodeVersion;
     }
+    /**
+     * Fetches the networkId of the backing Ethereum node
+     * @returns The networkId
+     */
     public async getNetworkIdAsync(): Promise<number> {
         const networkIdStr = await promisify<string>(this._web3.version.getNetwork)();
         const networkId = _.parseInt(networkIdStr);
         return networkId;
     }
+    /**
+     * Retrieves the transaction receipt for a given transaction hash
+     * @param txHash Transaction hash
+     * @returns The transaction receipt, including it's status (0: failed, 1: succeeded or undefined: not found)
+     */
     public async getTransactionReceiptAsync(txHash: string): Promise<TransactionReceipt> {
         const transactionReceipt = await promisify<TransactionReceipt>(this._web3.eth.getTransactionReceipt)(txHash);
         if (!_.isNull(transactionReceipt)) {
@@ -54,57 +104,117 @@ export class Web3Wrapper {
         }
         return transactionReceipt;
     }
+    /**
+     * Convert an Ether amount from ETH to Wei
+     * @param ethAmount Amount of Ether to convert to wei
+     * @returns Amount in wei
+     */
     public toWei(ethAmount: BigNumber): BigNumber {
         const balanceWei = this._web3.toWei(ethAmount, 'ether');
         return balanceWei;
     }
+    /**
+     * Retrieves an accounts Ether balance in wei
+     * @param owner Account whose balance you wish to check
+     * @returns Balance in wei
+     */
     public async getBalanceInWeiAsync(owner: string): Promise<BigNumber> {
         let balanceInWei = await promisify<BigNumber>(this._web3.eth.getBalance)(owner);
         // Rewrap in a new BigNumber
         balanceInWei = new BigNumber(balanceInWei);
         return balanceInWei;
     }
+    /**
+     * Check if a contract exists at a given address
+     * @param address Account address to check
+     * @returns Whether or not contract code was found at the supplied address
+     */
     public async doesContractExistAtAddressAsync(address: string): Promise<boolean> {
         const code = await promisify<string>(this._web3.eth.getCode)(address);
         // Regex matches 0x0, 0x00, 0x in order to accommodate poorly implemented clients
         const codeIsEmpty = /^0x0{0,40}$/i.test(code);
         return !codeIsEmpty;
     }
+    /**
+     * Sign a message with a specific address's private key (`eth_sign`)
+     * @param address Address of signer
+     * @param message Message to sign
+     * @returns Signature string (might be VRS or RSV depending on the Signer)
+     */
     public async signMessageAsync(address: string, message: string): Promise<string> {
         const signData = await promisify<string>(this._web3.eth.sign)(address, message);
         return signData;
     }
+    /**
+     * Fetches the latest blockNumber
+     * @returns Block number
+     */
     public async getBlockNumberAsync(): Promise<number> {
         const blockNumber = await promisify<number>(this._web3.eth.getBlockNumber)();
         return blockNumber;
     }
+    /**
+     * Fetch a specific Ethereum block
+     * @param blockParam The block you wish to fetch (blockHash, blockNumber or blockLiteral)
+     * @returns The requested block without transaction data
+     */
     public async getBlockAsync(blockParam: string | Web3.BlockParam): Promise<Web3.BlockWithoutTransactionData> {
         const block = await promisify<Web3.BlockWithoutTransactionData>(this._web3.eth.getBlock)(blockParam);
         return block;
     }
+    /**
+     * Fetch a block's timestamp
+     * @param blockParam The block you wish to fetch (blockHash, blockNumber or blockLiteral)
+     * @returns The timestamp the block was mined
+     */
     public async getBlockTimestampAsync(blockParam: string | Web3.BlockParam): Promise<number> {
         const { timestamp } = await this.getBlockAsync(blockParam);
         return timestamp;
     }
+    /**
+     * Retrieve the user addresses available through the provider
+     * @returns Available user addresses
+     */
     public async getAvailableAddressesAsync(): Promise<string[]> {
         const addresses = await promisify<string[]>(this._web3.eth.getAccounts)();
         const normalizedAddresses = _.map(addresses, address => address.toLowerCase());
         return normalizedAddresses;
     }
+    /**
+     * Take a snapshot of the blockchain state on a TestRPC/Ganache local node
+     * @returns The snapshot Id. This can be used to revert to this snapshot
+     */
     public async takeSnapshotAsync(): Promise<number> {
         const snapshotId = Number(await this._sendRawPayloadAsync<string>({ method: 'evm_snapshot', params: [] }));
         return snapshotId;
     }
+    /**
+     * Revert the blockchain state to a previous snapshot state on TestRPC/Ganache local node
+     * @param snapshotId snapshot Id to revert to
+     * @returns Whether the revert was successful
+     */
     public async revertSnapshotAsync(snapshotId: number): Promise<boolean> {
         const didRevert = await this._sendRawPayloadAsync<boolean>({ method: 'evm_revert', params: [snapshotId] });
         return didRevert;
     }
+    /**
+     * Mine a block on a TestRPC/Ganache local node
+     */
     public async mineBlockAsync(): Promise<void> {
         await this._sendRawPayloadAsync<string>({ method: 'evm_mine', params: [] });
     }
+    /**
+     * Increase the next blocks timestamp on TestRPC/Ganache local node
+     * @param timeDelta Amount of time to add in seconds
+     */
     public async increaseTimeAsync(timeDelta: number): Promise<void> {
         await this._sendRawPayloadAsync<string>({ method: 'evm_increaseTime', params: [timeDelta] });
     }
+    /**
+     * Retrieve smart contract logs for a given filter
+     * @param filter Parameters by which to filter which logs to retrieve
+     * @returns The corresponding log entries
+     */
     public async getLogsAsync(filter: Web3.FilterObject): Promise<Web3.LogEntry[]> {
         let fromBlock = filter.fromBlock;
         if (_.isNumber(fromBlock)) {
@@ -129,18 +239,39 @@ export class Web3Wrapper {
         const formattedLogs = _.map(rawLogs, this._formatLog.bind(this));
         return formattedLogs;
     }
+    /**
+     * Get a Web3 contract factory instance for a given ABI
+     * @param abi Smart contract ABI
+     * @returns Web3 contract factory which can create Web3 Contract instances for the supplied ABI
+     */
     public getContractFromAbi(abi: Web3.ContractAbi): Web3.Contract<any> {
         const web3Contract = this._web3.eth.contract(abi);
         return web3Contract;
     }
+    /**
+     * Calculate the estimated gas cost for a given transaction
+     * @param txData Transaction data
+     * @returns Estimated gas cost
+     */
     public async estimateGasAsync(txData: Partial<Web3.TxData>): Promise<number> {
         const gas = await promisify<number>(this._web3.eth.estimateGas)(txData);
         return gas;
     }
+    /**
+     * Call a smart contract method at a given block height
+     * @param callData Call data
+     * @param defaultBlock Block height at which to make the call
+     * @returns The raw call result
+     */
     public async callAsync(callData: Web3.CallData, defaultBlock?: Web3.BlockParam): Promise<string> {
         const rawCallResult = await promisify<string>(this._web3.eth.call)(callData, defaultBlock);
         return rawCallResult;
     }
+    /**
+     * Send a transaction
+     * @param txData Transaction data
+     * @returns Transaction hash
+     */
     public async sendTransactionAsync(txData: Web3.TxData): Promise<string> {
         const txHash = await promisify<string>(this._web3.eth.sendTransaction)(txData);
         return txHash;