agentchain.md

AgentChain: Decentralized Verification of LLM-Based Autonomous Agents via Smart Contracts

Author: Harshil Patel
Affiliation: CHARUSAT, Anand, Gujarat, India

Abstract

AgentChain provides decentralized verification of LLM-based agents using Ethereum smart contracts. It ensures tamper-proof logging, auditability, and multi-agent consensus.

Key Results

• 42,310 gas/action
• 187 ms latency
• 84 actions/sec throughput

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I. Introduction

LLM agents introduce accountability and auditability issues due to centralized logs. AgentChain solves this using blockchain.

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II. Related Work

Existing systems lack verifiable logging and decentralized validation.

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III. Architecture

Components:

• AgentRegistry
• ActionLog
• ConsensusVerifier

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IV. Implementation

Solidity Contract (ActionLog)

pragma solidity ^0.8.20;

interface IAgentRegistry {
function isRegistered(address a) external view returns (bool);
}

contract ActionLog {

struct LogEntry {
bytes32 contentHash;
string ipfsCid;
uint8 actionType;
uint256 timestamp;
address agentAddr;
}

IAgentRegistry public registry;
mapping(uint256 => LogEntry) public logs;
uint256 public logCount;

event ActionCommitted(
uint256 indexed logId,
address indexed agent,
bytes32 contentHash,
string ipfsCid,
uint8 actionType,
uint256 timestamp
);

constructor(address _registry) {
registry = IAgentRegistry(_registry);
}

function commit(bytes32 _hash,string calldata _cid,uint8 _type) external returns (uint256) {

require(registry.isRegistered(msg.sender));

uint256 id = logCount++;

logs[id] = LogEntry(_hash,_cid,_type,block.timestamp,msg.sender);

emit ActionCommitted(id,msg.sender,_hash,_cid,_type,block.timestamp);

return id;
}
}

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V. Evaluation

• Gas: 42K per action
• Latency: 187 ms
• Throughput: 84 actions/sec

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VI. Security

• Tamper-proof logs
• Sybil resistance
• Replay protection

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VII. Conclusion

AgentChain enables verifiable and decentralized AI agent execution.