Overview

Message-Specific Methods

Obsidian extends standard Ethereum JSON-RPC with message-specific methods:

Method	Purpose
eth_sendMessageBlob	Submit a message
eth_getBlockMessages	Get messages from a block
eth_getMessagesBySender	Query by sender address
eth_getMessageByHash	Get specific message
eth_getMessageQueueSize	Check queue status
eth_getMessageWork	Get VDF parameters

Standard Methods

All standard Ethereum methods work:

• eth_blockNumber

• eth_getBlockByNumber

• eth_getBalance

• eth_sendTransaction

• etc.

Authentication

No authentication required for read methods. Write methods require valid signatures.

Rate Limits

Tier	Requests/sec
Public	10
Registered	100
Archive node	Unlimited

Response Format

Standard JSON-RPC 2.0:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": { ... }
}

Errors:

{
  "jsonrpc": "2.0",
  "id": 1,
  "error": {
    "code": -32000,
    "message": "Invalid signature"
  }
}