eth_protocolVersion - Bittensor RPC Method

Returns the current Ethereum protocol version used by the Bittensor node.

Why Bittensor? Build on the decentralized machine intelligence network built around subnets, TAO staking, and validator-miner coordination with Yuma Consensus, subnet-based specialization, dual Substrate and EVM surfaces, and onchain incentive coordination.

When to Use This Method

eth_protocolVersion is useful for AI/ML developers, subnet operators, and teams building decentralized machine learning applications:

• Client Compatibility - Verify that a node supports the protocol version your application requires
• Version-Gated Features - Enable or disable features based on the protocol version (e.g., EIP-1559 support)
• Multi-Client Environments - Ensure consistent protocol versions across a fleet of nodes
• Debugging - Diagnose issues caused by protocol version mismatches between clients

Current Dwellir Result

Dwellir's shared Bittensor EVM endpoint currently returns the integer-compatible value 1 from eth_protocolVersion. Treat that value as a simple compatibility signal for this surface instead of assuming the response is always a hex string.

Best Practices

• Modern clients often return a static value; do not rely on this method for feature detection
• This method is not used for transaction signing; use eth_chainId for network identification
• Many post-Merge clients no longer support this method; handle unsupported-method errors gracefully

Code Examples

Common Use Cases

1. Gate compatibility checks on the raw value

async function assertBittensorProtocol(provider) {
  const result = await provider.send('eth_protocolVersion', []);
  const version = typeof result === 'string' ? Number(result) : result;

  if (version !== 1) {
    throw new Error(`Unexpected Bittensor protocol version: ${version}`);
  }

  return version;
}

2. Record client/version pairs across a fleet

async function auditBittensorNodes(provider) {
  const [protocolVersion, clientVersion] = await Promise.all([
    provider.send('eth_protocolVersion', []),
    provider.send('web3_clientVersion', []),
  ]);

  return {
    protocolVersion: typeof protocolVersion === 'string' ? Number(protocolVersion) : protocolVersion,
    clientVersion,
  };
}

3. Normalize mixed-client protocol responses

def normalize_protocol_version(value) -> int:
    if isinstance(value, str):
        return int(value, 0)

    return int(value)

Error Handling

Common errors and solutions:

Related Methods

• web3_clientVersion - Get the client software version string
• net_version - Get the network ID
• eth_chainId - Get the chain ID (EIP-155)