creating interface for the dispenser contract

src/dispenser/Dispenser.ts

@@ -0,0 +1,45 @@
+import Web3 from 'web3'
+import { AbiItem } from 'web3-utils/types'
+
+import defaultDispenserABI from '@oceanprotocol/contracts/artifacts/Dispenser.json'
+import defaultDatatokensABI from '@oceanprotocol/contracts/artifacts/DataTokenTemplate.json'
+import { Logger, getFairGasPrice } from '../utils'
+import wordListDefault from '../data/words.json'
+import { TransactionReceipt } from 'web3-core'
+import BigNumber from 'bignumber.js'
+import Decimal from 'decimal.js'
+
+/**
+ * Provides an interface to Dispenser
+ */
+export class Dispenser {
+  public GASLIMIT_DEFAULT = 1000000
+  public dispenserAddress: string
+  public dispenserABI: AbiItem | AbiItem[]
+  public datatokensABI: AbiItem | AbiItem[]
+  public web3: Web3
+  private logger: Logger
+  public startBlock: number
+  /**
+   * Instantiate DataTokens (independently of Ocean).
+   * @param {String} factoryAddress
+   * @param {AbiItem | AbiItem[]} factoryABI
+   * @param {AbiItem | AbiItem[]} datatokensABI
+   * @param {Web3} web3
+   */
+  constructor(
+    dispenserAddress: string,
+    dispenserABI: AbiItem | AbiItem[],
+    datatokensABI: AbiItem | AbiItem[],
+    web3: Web3,
+    logger: Logger,
+    startBlock?: number
+  ) {
+    this.dispenserAddress = dispenserAddress
+    this.dispenserABI = dispenserABI || (defaultDispenserABI.abi as AbiItem[])
+    this.datatokensABI = datatokensABI || (defaultDatatokensABI.abi as AbiItem[])
+    this.web3 = web3
+    this.logger = logger
+    this.startBlock = startBlock || 0
+  }
+}