Prepare Smart Contract Transaction with Overledger API on New Column from PostgreSQL API

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New Column from the PostgreSQL API

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Prepare Smart Contract Transaction with the Overledger API

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Getting Started#

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

Select this integration
Configure the New Column trigger
1. Connect your PostgreSQL account
2. Configure Polling Interval
3. Select a Schema
4. Select a Table
Configure the Prepare Smart Contract Transaction action
1. Connect your Overledger account
2. Select a Overledger Instance
3. Select a Location Technology
4. Configure Signing Account ID
5. Configure Smart Contract ID
6. Configure Function Name
7. Optional- Configure Input Parameters
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 Column on PostgreSQL

Description:Emit new event when a new column is added to a table. [See the documentation](https://node-postgres.com/features/queries)

Version:2.0.6

Key:postgresql-new-column

View on GitHub

PostgreSQL Overview#

On Pipedream, you can leverage the PostgreSQL app to create workflows that automate database operations, synchronize data across platforms, and react to database events in real-time. Think handling new row entries, updating records from webhooks, or even compiling reports on a set schedule. Pipedream's serverless platform provides a powerful way to connect PostgreSQL with a variety of apps, enabling you to create tailored automation that fits your specific needs.

Trigger Code#

import common from "../common.mjs";

export default {
  ...common,
  name: "New Column",
  key: "postgresql-new-column",
  description: "Emit new event when a new column is added to a table. [See the documentation](https://node-postgres.com/features/queries)",
  version: "2.0.6",
  type: "source",
  props: {
    ...common.props,
    schema: {
      propDefinition: [
        common.props.postgresql,
        "schema",
      ],
    },
    table: {
      propDefinition: [
        common.props.postgresql,
        "table",
        (c) => ({
          schema: c.schema,
        }),
      ],
    },
  },
  async run() {
    const previousColumns = this._getPreviousValues() || [];

    const columns = await this.postgresql.getColumns(this.table, this.schema);

    const newColumns = columns.filter((column) => !previousColumns.includes(column));
    for (const column of newColumns) {
      const meta = this.generateMeta(column);
      this.$emit(column, meta);
    }

    this._setPreviousValues(columns);
  },
};

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
PostgreSQL	`postgresql`	`app`	This component uses the PostgreSQL app.
N/A	`db`	`$.service.db`	This component uses `$.service.db` to maintain state between executions.
Polling Interval	`timer`	`$.interface.timer`	Pipedream will poll the API on this schedule
Schema	`schema`	`string`	Select a value from the drop down menu.
Table	`table`	`string`	Select a value from the drop down menu.

Trigger Authentication#

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

Connecting to Restricted Databases

Either enable the shared static IP for this account below, or configure a VPC to deploy any workflow in your workspace to a private network with a dedicated static IP. Learn more in our docs.

SSL Setup

Configure SSL on your PostgreSQL database by providing the CA (Certificate Authority), and choosing between Full Verification, Verify Certificate Authority (CA), or Skip Verification. Skipping verification is not recommended as this has serious security implications.

About PostgreSQL#

PostgreSQL is a free and open-source relational database management system emphasizing extensibility and SQL compliance.

Action#

Prepare Smart Contract Transaction on Overledger

Description:Prepares a smart contract transaction for signing on the Overledger platform. [See the documentation](https://developers.quant.network/reference/preparesmartcontractwrite)

Version:0.0.2

Key:overledger-prepare-smart-contract-transaction

View on GitHub

Overledger Overview#

The Overledger API by Quant Network allows developers to interact with multiple blockchain networks. It facilitates the creation, reading, and execution of smart contracts and transactions across different blockchains. This API simplifies the complex nature of blockchain interoperability, enabling multi-chain applications (MApps) through a single gateway.

Action Code#

import {
  NETWORK_OPTIONS, TECHNOLOGY_OPTIONS,
} from "../../common/constants.mjs";
import { parseObject } from "../../common/utils.mjs";
import overledger from "../../overledger.app.mjs";

export default {
  key: "overledger-prepare-smart-contract-transaction",
  name: "Prepare Smart Contract Transaction",
  description: "Prepares a smart contract transaction for signing on the Overledger platform. [See the documentation](https://developers.quant.network/reference/preparesmartcontractwrite)",
  version: "0.0.2",
  type: "action",
  props: {
    overledger,
    environment: {
      propDefinition: [
        overledger,
        "environment",
      ],
    },
    locationTechnology: {
      type: "string",
      label: "Location Technology",
      description: "The technology of the blockchain that the transaction will be submitted to",
      options: TECHNOLOGY_OPTIONS,
      reloadProps: true,
    },
    signingAccountId: {
      type: "string",
      label: "Signing Account ID",
      description: "The blockchain account ID/address that will be sending this transaction",
    },
    smartContractId: {
      type: "string",
      label: "Smart Contract ID",
      description: "The ID/address of the smart contract to interact with.",

    },
    functionName: {
      type: "string",
      label: "Function Name",
      description: "The name of the function to call on the smart contract.",
    },
    inputParameters: {
      type: "string[]",
      label: "Input Parameters",
      description: "The input parameters for the smart contract function, in JSON format.",
      optional: true,
    },
  },
  async additionalProps() {
    const props = {};
    if (this.locationTechnology) {
      props.locationNetwork = {
        type: "string",
        label: "Location Network",
        description: "The blockchain network the transaction will be submitted to.",
        options: NETWORK_OPTIONS[this.locationTechnology],
      };
    }
    return props;
  },
  async run({ $ }) {
    const requestBody = {
      location: {
        technology: this.locationTechnology,
        network: this.locationNetwork,
      },
      signingAccountId: this.signingAccountId,
      functionName: this.functionName,
      smartContractId: this.smartContractId,
      inputParameters: parseObject(this.inputParameters), //parse these values using the parseObject function at this shouls turn the JSON string into JSON objects to used in the request body.
    };

    const response = await this.overledger.prepareSmartContractTransaction({
      $,
      environment: this.environment,
      data: requestBody,
    });
    $.export("$summary", "Smart contract transaction prepared successfully");
    return response;
  },
};

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
Overledger	`overledger`	`app`	This component uses the Overledger app.
Overledger Instance	`environment`	`string`	Select a value from the drop down menu:`{ "label": "Sandbox", "value": "sandbox" }{ "label": "Overledger", "value": "overledger" }`
Location Technology	`locationTechnology`	`string`	Select a value from the drop down menu:`{ "label": "Ethereum", "value": "ethereum" }{ "label": "Substrate", "value": "substrate" }{ "label": "XRP Ledger", "value": "xrp ledger" }{ "label": "Bitcoin", "value": "bitcoin" }{ "label": "Hyperledger Fabric", "value": "hyperledger fabric" }`
Signing Account ID	`signingAccountId`	`string`	The blockchain account ID/address that will be sending this transaction
Smart Contract ID	`smartContractId`	`string`	The ID/address of the smart contract to interact with.
Function Name	`functionName`	`string`	The name of the function to call on the smart contract.
Input Parameters	`inputParameters`	`string[]`	The input parameters for the smart contract function, in JSON format.

Action Authentication#

Overledger uses OAuth authentication. When you connect your Overledger account, Pipedream will open a popup window where you can sign into Overledger and grant Pipedream permission to connect to your account. Pipedream securely stores and automatically refreshes the OAuth tokens so you can easily authenticate any Overledger API.

Pipedream requests the following authorization scopes when you connect your account:

overledger/read.scope