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Chaincast

WordPress plugin to auto-publish your posts to the Hive and Steem blockchains, with pluggable per-chain connectors.

by Philipp Keweloh · github.com/pkeweloh/wp-chaincast · website

★ 0stars

Install

Download source zip No release zip yet

This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.

Install straight from GitHub with WP-CLI:

wp plugin install https://github.com/pkeweloh/wp-chaincast/archive/refs/heads/main.zip
No built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
Readme github.com/pkeweloh/wp-chaincast ↗

Publish your WordPress posts to the Hive and Steem blockchains — automatically or on demand — through a pluggable, chain-agnostic connector architecture.

The signing layer (graphene serialization, canonical secp256k1 signing, RPC with failover) is implemented in pure PHP. No external signing service is involved.

Features

  • Connectors for Hive and Steem, built on a shared graphene base. The core is chain-agnostic; new chains are added as connectors without touching it.
  • Two signing modes:
    • Automatic — posting key stored on the server, encrypted with AES-256-GCM (the encryption key lives in a wp-config.php constant, never in the DB). Signs and broadcasts on its own.
    • Assisted — signing happens in the browser via Hive Keychain / Steem Keychain. The key never reaches the server.
  • Per-post control — publish/update from a button in the editor, or enable automatic publishing per chain.
  • Content pipeline — HTML→Markdown, automatic permlink, json_metadata with a canonical URL for SEO.
  • Customizable attribution footer with {site} / {url} placeholders (off by default).
  • Reward sharing (Hive/Steem beneficiaries) — global or per post.
  • Per-post tags and a configurable WordPress-category → chain-tag/community map (independent per chain).
  • Publish history log per post and idempotent state (re-publishing updates the same on-chain post).
  • Background queue via Action Scheduler; credential validation against the chain without broadcasting.

Requirements

  • PHP 8.1+
  • PHP gmp extension (hard requirement of the elliptic-curve library used for signing). Without it, server-side automatic signing is disabled; assisted Keychain mode still works.
  • WordPress 6.0+
  • Composer dependencies installed (vendor/ bundled in releases): simplito/elliptic-php, stephenhill/base58, league/html-to-markdown, woocommerce/action-scheduler.

Installation

  1. Copy the plugin folder to wp-content/plugins/chaincast/ (a release ZIP already includes vendor/; from source, run composer install in the plugin folder).

  2. Activate it in Plugins.

  3. Configure connectors in Settings → Chaincast.

  4. For automatic (server-side) mode, define the encryption key in wp-config.php:

    define( 'CHAINCAST_KEY', 'your-base64-encoded-32-byte-key' );

  5. Publish on demand from the Chaincast box in the post editor, or enable automatic publishing per chain.

Security

  • Use the posting key only (limited authority). Never the Active or Owner key.
  • Stored posting keys are encrypted at rest with AES-256-GCM; the key is read from a wp-config.php constant, not the database.
  • The plugin talks only to the public RPC nodes of the chains you enable.

Development

  • Run the test suite: php vendor/bin/phpunit (64 tests).
  • Architecture and design decisions: see DESIGN.md.
  • The graphene serializer and the canonical signing loop are validated byte-for-byte against golden vectors (tests/fixtures/), generated from mahdiyari/hive-php used purely as a test oracle.

Internationalization

Source strings are in English. A Spanish (es_ES) translation is bundled in languages/ along with the .pot template. To recompile the .mo after editing a .po:

python languages/compile_mo.py

License

GPL-2.0-or-later. See LICENSE (or https://www.gnu.org/licenses/gpl-2.0.html).