Hedera Tx Builder

What This Skill Does

The Hedera Tx Builder skill, developed by harleyscodes, provides a robust interface for interacting with the Hedera Hashgraph network directly from your OpenClaw agent. It simplifies the complex process of constructing, signing, and executing transactions on the Hedera distributed ledger. By utilizing the official @hashgraph/sdk, this skill allows the agent to handle HBAR transfers, manage token associations, and execute smart contract calls without requiring manual script creation for every transaction. It acts as an abstraction layer that streamlines network communication with both Hedera Mainnet and Testnet environments.

Installation

To integrate this skill into your environment, use the OpenClaw package manager. Execute the following command in your terminal:

clawhub install openclaw/skills/skills/harleyscodes/hedera-tx-builder

Ensure that you have Node.js installed in your project environment, as the skill relies on the @hashgraph/sdk to manage cryptographic signing and network serialization. Once installed, ensure your agent has access to the necessary private keys and account IDs to sign transactions effectively.

Use Cases

This skill is designed for developers and power users looking to automate blockchain operations. Key use cases include:

1. Financial Automation: Automatically sending HBAR payments or processing payroll-style distributions between Hedera accounts.
2. Token Management: Programmatically associating new tokens with accounts to enable trading or holding assets.
3. Immutable Logging: Publishing messages to Hedera Consensus Service (HCS) topics for audit trails or tamper-proof logging.
4. Smart Contract Interaction: Triggering contract functions on the network by building and submitting transaction objects.

Example Prompts

1. "Build and sign a transfer of 50 HBAR from my source account 0.0.1234 to the recipient account 0.0.5678, adding a memo: 'Project milestone payment'."
2. "Construct a TokenAssociateTransaction for account 0.0.9999 to link token ID 0.0.1111 so I can receive them."
3. "Send a message to topic 0.0.2222 with the content 'Server deployment initiated' and sign it with my operator key."

Tips & Limitations

When using this skill, always verify your target network. Transactions executed on the Mainnet are irreversible and involve real monetary value. Use the Testnet endpoint for development and debugging to avoid accidental HBAR loss. Remember that Hedera transactions have a default valid duration of 180 seconds; if your transaction fails, check your network latency or account balance. Always safeguard your operator private keys, as the skill requires them for signing—never expose these keys in public logs or clear-text files.