init

modules/account/store/getters/Contract.js

@@ -0,0 +1,57 @@
+import Web3 from 'web3'
+
+const ABI = [
+  {
+    anonymous: false,
+    inputs: [
+      { indexed: true, internalType: 'address', name: 'who', type: 'address' },
+      { indexed: false, internalType: 'bytes', name: 'data', type: 'bytes' }
+    ],
+    name: 'Echo',
+    type: 'event'
+  },
+  {
+    inputs: [{ internalType: 'bytes', name: '_data', type: 'bytes' }],
+    name: 'echo',
+    outputs: [],
+    stateMutability: 'nonpayable',
+    type: 'function'
+  }
+]
+
+export class EchoContract {
+  constructor({ rpcUrl, address }) {
+    this.web3 = new Web3(rpcUrl)
+
+    this.contract = new this.web3.eth.Contract(ABI, address)
+    this.address = this.contract._address
+  }
+
+  async getEvents({ address, fromBlock = 0, toBlock = 'latest' }) {
+    try {
+      return await this.contract.getPastEvents('Echo', {
+        toBlock,
+        fromBlock,
+        filter: { who: address }
+      })
+    } catch (err) {
+      throw new Error(`Method getEvents has error: ${err.message}`)
+    }
+  }
+
+  async estimateGas({ from, data }) {
+    try {
+      return await this.contract.methods.echo(data).estimateGas({ from })
+    } catch (err) {
+      throw new Error(`Method estimateGas has error: ${err.message}`)
+    }
+  }
+
+  getCallData(data) {
+    try {
+      return this.contract.methods.echo(data).encodeABI()
+    } catch (err) {
+      throw new Error(`Method getCallData has error: ${err.message}`)
+    }
+  }
+}