hedera-tx-builder
Build and sign Hedera transactions. Use for: (1) Creating HBAR transfers, (2) Token operations, (3) Smart contract calls, (4) Submitting to Hedera network.
Best use case
hedera-tx-builder is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Build and sign Hedera transactions. Use for: (1) Creating HBAR transfers, (2) Token operations, (3) Smart contract calls, (4) Submitting to Hedera network.
Teams using hedera-tx-builder should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/hedera-tx-builder/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How hedera-tx-builder Compares
| Feature / Agent | hedera-tx-builder | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Build and sign Hedera transactions. Use for: (1) Creating HBAR transfers, (2) Token operations, (3) Smart contract calls, (4) Submitting to Hedera network.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# Hedera Transaction Builder
## Setup
```bash
npm install @hashgraph/sdk
```
## Client Setup
```typescript
import { Client, AccountBalanceQuery, Hbar } from '@hashgraph/sdk';
const client = Client.forMainnet();
// Or for testnet:
const client = Client.forTestnet();
```
## Transfer HBAR
```typescript
import { TransferTransaction, Hbar } from '@hashgraph/sdk';
const tx = new TransferTransaction()
.addHbarTransfer(fromAccountId, new Hbar(-100)) // send
.addHbarTransfer(toAccountId, new Hbar(100)) // receive
.setTransactionMemo("Payment for goods");
// Sign with hashpack or operator
const signTx = await tx.sign(operatorKey);
const result = await signTx.execute(client);
```
## Key Transaction Types
### AccountCreate
```typescript
new AccountCreateTransaction()
.setKey(publicKey)
.setInitialBalance(new Hbar(10))
.setAccountMemo("My account");
```
### TokenAssociate
```typescript
new TokenAssociateTransaction()
.setAccountId(accountId)
.setTokenIds([tokenId1, tokenId2]);
```
### TopicMessage
```typescript
new TopicMessageTransaction()
.setTopicId(topicId)
.setMessage("Hello Hedera!");
```
## Network Endpoints
- **Mainnet**: `https://mainnet.hashio.io/api`
- **Testnet**: `https://testnet.hashio.io/api`
## Important Concepts
- **Hbar**: 1 HBAR = 100,000,000 tinybars
- **Account ID**: Format `shard.realm.num` (e.g., `0.0.12345`)
- **Transaction Fee**: Small HBAR fee for each transaction
- **Transaction Valid Duration**: 180 seconds by defaultRelated Skills
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