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polkadot-bulletin

Upload and fetch content-addressed data on the Polkadot Bulletin Chain.

2|2|Updated Mar 16, 2026
Search Tags:#upload#gateway#signer#polkadot#cid#bulletin
One-click install
npx skills add https://github.com/paritytech/polkadot-apps --skill polkadot-bulletin
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: polkadot-bulletin
Source: https://github.com/paritytech/polkadot-apps/tree/main/skills/polkadot-bulletin
Command: npx skills add https://github.com/paritytech/polkadot-apps --skill polkadot-bulletin

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a typed, end-to-end interface for uploading and retrieving data on the Polkadot Bulletin Chain, including CID management and gateway access.

Core Features & Use Cases

  • Content-addressed storage via CIDv1 for Bulletin data.
  • Upload single or batch items with optional signer or host-based preimage flow.
  • Fetch data via gateway or host preimage lookup, with conversions between CID and on-chain hashes.

Quick Start

Upload a data blob to the Bulletin Chain and retrieve it by CID.

Frequently Asked Questions about polkadot-bulletin

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I upload content-addressed data to the Polkadot Bulletin Chain?▼

You can upload content-addressed data to the Polkadot Bulletin Chain using a typed BulletinApi that supports both standalone signer workflows and host-container preimage workflows for single or batch item uploads. Upload behavior is configurable via UploadOptions.

What is a CIDv1 and how does it relate to on-chain hashes for Polkadot Bulletin data?▼

A CIDv1 is a content identifier used for content-addressed storage on the Bulletin Chain. The Skill provides CID utilities to compute CIDs for your data and handles conversions between the CIDv1 and the underlying on-chain hashes used for preimage lookups.

How do I fetch data from a gateway using a CID on the Polkadot Bulletin Chain?▼

To fetch data from a gateway using a CID on the Polkadot Bulletin Chain, use the provided gateway URL builders and QueryOptions. This allows you to retrieve content via gateway-based queries or perform a host preimage lookup depending on your workflow.

Can I perform batch uploads to the Polkadot Bulletin Chain without a dedicated signer?▼

Yes, you can perform batch uploads to the Polkadot Bulletin Chain without a dedicated standalone signer by utilizing the host-container preimage workflow. The Skill supports configurable strategies for both signer-based and host-based batch item uploads.

What's the best way to convert between CIDs and on-chain hashes for Polkadot Bulletin queries?▼

The best way to convert between CIDs and on-chain hashes for Polkadot Bulletin queries is to use the Skill's built-in CID utilities and gateway URL builders. These tools seamlessly translate CIDv1 identifiers into the hashes required for host preimage lookups.

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