Append to record with Data Stores API on New Transaction Posted from PolygonScan API

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Trigger workflow on

New Transaction Posted from the PolygonScan API

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Append to record with the Data Stores API

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Getting Started#

This integration creates a workflow with a PolygonScan trigger and Data Stores action. When you configure and deploy the workflow, it will run on Pipedream's servers 24x7 for free.

Select this integration
Configure the New Transaction Posted trigger
1. Connect your PolygonScan account
2. Configure Address
3. Configure timer
Configure the Append to record action
1. Connect your Data Stores account
2. Configure Data Store
3. Select a Key
4. Configure Value
Deploy the workflow
Send a test event to validate your setup
Turn on the trigger

Details#

This integration uses pre-built, source-available components from Pipedream's GitHub repo. These components are developed by Pipedream and the community, and verified and maintained by Pipedream.

To contribute an update to an existing component or create a new component, create a PR on GitHub. If you're new to Pipedream component development, you can start with quickstarts for trigger span and action development, and then review the component API reference.

Trigger#

New Transaction Posted on PolygonScan

Description:Emit new event when a new transaction is posted on the PolygonScan network for a specific address.

Version:0.0.1

Key:polygonscan-transaction-posted

View on GitHub

PolygonScan Overview#

The PolygonScan API provides access to blockchain data from the Polygon network. It allows for querying of blocks, transactions, and wallet addresses, among other data points. With Pipedream, you can integrate this API to automate monitoring, alerting, and data analysis tasks. You can leverage Pipedream's serverless platform to create workflows that react to events on the Polygon network in real-time, without having to manage infrastructure or write complex backend code.

Trigger Code#

import { DEFAULT_POLLING_SOURCE_TIMER_INTERVAL } from "@pipedream/platform";
import polygonscan from "../../polygonscan.app.mjs";
import sampleEmit from "./test-event.mjs";

export default {
  key: "polygonscan-transaction-posted",
  name: "New Transaction Posted",
  description: "Emit new event when a new transaction is posted on the PolygonScan network for a specific address.",
  version: "0.0.1",
  type: "source",
  dedupe: "unique",
  props: {
    polygonscan,
    db: "$.service.db",
    address: {
      propDefinition: [
        polygonscan,
        "address",
      ],
    },
    timer: {
      type: "$.interface.timer",
      default: {
        intervalSeconds: DEFAULT_POLLING_SOURCE_TIMER_INTERVAL,
      },
    },
  },
  methods: {
    _getLastBlockNumber() {
      return this.db.get("lastBlockNumber") || 0;
    },
    _setLastBlockNumber(lastBlockNumber = null) {
      this.db.set("lastBlockNumber", lastBlockNumber);
    },
    async startEvent(maxResults = 0) {
      const lastBlockNumber = this._getLastBlockNumber();

      const response = this.polygonscan.paginate({
        fn: this.polygonscan.getTransactionsByAddress,
        maxResults,
        params: {
          startblock: lastBlockNumber,
          address: this.address,
          sort: "desc",
        },
      });

      let responseArray = [];

      for await (const item of response) {
        responseArray.push(item);
      }

      if (responseArray.length) this._setLastBlockNumber(responseArray[0].blockNumber);

      for (const item of responseArray) {
        this.$emit(item, {
          id: item.blockNumber,
          summary: `New transaction with hash: ${item.hash}`,
          ts: item.timeStamp,
        });
      }
    },
  },
  hooks: {
    async deploy() {
      await this.startEvent(25);
    },
  },
  async run() {
    await this.startEvent();
  },
  sampleEmit,
};

Trigger Configuration#

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI and CLI.

Label	Prop	Type	Description
PolygonScan	`polygonscan`	`app`	This component uses the PolygonScan app.
N/A	`db`	`$.service.db`	This component uses `$.service.db` to maintain state between executions.
Address	`address`	`string`	The address to watch for new transactions.
	`timer`	`$.interface.timer`

Trigger Authentication#

PolygonScan uses API keys for authentication. When you connect your PolygonScan account, Pipedream securely stores the keys so you can easily authenticate to PolygonScan APIs in both code and no-code steps.

About PolygonScan#

Blockchain explorer for the Polygon (MATIC) network.

Action#

Append to record on Data Stores

Description:Append to a record in your data store [Pipedream Data Store](https://pipedream.com/data-stores/). If the record does not exist, a new record will be created in an array format.

Version:0.0.2

Key:data_stores-append-to-record

View on GitHub

Data Stores Overview#

Data Stores are a key-value store that allow you to persist state and share data across workflows. You can perform CRUD operations, enabling dynamic data management within your serverless architecture. Use it to save results from API calls, user inputs, or interim data; then read, update, or enrich this data in subsequent steps or workflows. Data Stores simplify stateful logic and cross-workflow communication, making them ideal for tracking process statuses, aggregating metrics, or serving as a simple configuration store.

Action Code#

import { ConfigurationError } from "@pipedream/platform";
import app from "../../data_stores.app.mjs";

export default {
  key: "data_stores-append-to-record",
  name: "Append to record",
  description: "Append to a record in your data store [Pipedream Data Store](https://pipedream.com/data-stores/). If the record does not exist, a new record will be created in an array format.",
  version: "0.0.2",
  type: "action",
  props: {
    app,
    dataStore: {
      propDefinition: [
        app,
        "dataStore",
      ],
    },
    key: {
      propDefinition: [
        app,
        "key",
        ({ dataStore }) => ({
          dataStore,
        }),
      ],
      description: "Enter a key for the record set you'd like to append to. Refer to your existing keys [here](https://pipedream.com/data-stores/).",
    },
    value: {
      propDefinition: [
        app,
        "value",
      ],
    },
  },
  async run({ $ }) {
    const {
      key,
      value,
    } = this;
    const currentValue = await this.dataStore.get(key);
    if (currentValue && !Array.isArray(currentValue)) {
      throw new ConfigurationError("The value for the specified key is not an array. You can only append records to an array.");
    }
    const recordSet = currentValue ?? [];
    const parsedValue = this.app.parseValue(value);
    recordSet.push(parsedValue);
    await this.dataStore.set(key, recordSet);
    // eslint-disable-next-line multiline-ternary
    $.export("$summary", `Successfully ${currentValue ? "appended to the record for" : "created new record with the"} key: \`${key}\`.`);
    return {
      key,
      value: parsedValue,
    };
  },
};

Action Configuration#

This component may be configured based on the props defined in the component code. Pipedream automatically prompts for input values in the UI.

Label	Prop	Type	Description
Data Stores	`app`	`app`	This component uses the Data Stores app.
Data Store	`dataStore`	`data_store`	Select an existing Data Store or create a new one.
Key	`key`	`string`	Select a value from the drop down menu.
Value	`value`	`any`	Enter a string, object, or array.