# solana-tx-building

Build, simulate, and inspect Solana transactions with guidance on instructions, v0 messages, lookup tables, compute budgets, and priority fees.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 439 installs · ★ 443
- Author: agiprolabs
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/agiprolabs/claude-trading-skills/tree/HEAD/skills/solana-tx-building/SKILL.md
- Updated: 2026-09-03
- HTML: https://affpapa.org/en/nevibecode/skills/solana-tx-building

## What it does

solana-tx-building explains how Solana transactions are assembled from instructions, account metadata, message fields, and signatures. It covers legacy and v0 formats, Address Lookup Tables, the serialized size limit, compute-unit settings, and priority fees.

The included patterns cover SOL transfers, SPL token transfers, and Associated Token Account creation. It also describes querying `getRecentPrioritizationFees` and obtaining Jupiter setup and swap instructions through `/quote` and `/swap-instructions`.

This skill stays on the construction and inspection side. Its scripts do not sign or submit real transactions, so a transaction should be simulated before it is sent.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add agiprolabs/claude-trading-skills --skill solana-tx-building -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/solana-tx-building/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/solana-tx-building/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add agiprolabs/claude-trading-skills --skill solana-tx-building -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/solana-tx-building/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add agiprolabs/claude-trading-skills --skill solana-tx-building -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/solana-tx-building/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install agiprolabs/claude-trading-skills solana-tx-building
```

2. **Manually: put the files in place**
- File: `.github/skills/solana-tx-building/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add agiprolabs/claude-trading-skills --skill solana-tx-building -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/agiprolabs/claude-trading-skills --path skills/solana-tx-building
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/solana-tx-building/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add agiprolabs/claude-trading-skills --skill solana-tx-building -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/agiprolabs/claude-trading-skills/tree/HEAD/skills/solana-tx-building/SKILL.md

## When to use it
- build a SOL transfer instruction
- prepare an SPL token transfer
- create an Associated Token Account
- set compute units and a priority fee
- fit a large account set into a v0 transaction

## Example prompts
- Build a SOL transfer between these two accounts and prepare the transaction for simulation.
- Show the required accounts and instruction data for an SPL token transfer.
- Check whether this transaction needs v0 with an Address Lookup Table, then estimate its priority fee with `getRecentPrioritizationFees`.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 079e5e917953a0c4.

BEGIN THIRD-PARTY FILE 079e5e917953a0c4
````text
---
name: solana-tx-building
description: Solana transaction construction including instruction building, account resolution, compute budget, priority fees, and versioned transactions
---

# Solana Transaction Building

This skill covers how to construct, simulate, and inspect Solana transactions programmatically. It addresses the full anatomy of a Solana transaction — from raw instruction encoding to versioned transaction formats, compute budget management, priority fees, and address lookup tables.

**Safety**: This skill is for transaction *construction* and *analysis* only. Scripts in this skill NEVER sign or submit real transactions. Always simulate before sending. Never auto-sign.

## Transaction Anatomy

A Solana transaction consists of:

1. **Signatures**: One or more Ed25519 signatures (64 bytes each)
2. **Message**: The serializable payload containing:
   - **Header**: Counts of required signers, read-only signers, read-only non-signers
   - **Account keys**: Array of all pubkeys referenced by instructions
   - **Recent blockhash**: 32-byte hash for replay protection (expires ~60-90 seconds)
   - **Instructions**: Array of program calls

### Transaction Size Limit

The hard limit is **1232 bytes** for the entire serialized transaction. This constrains how many instructions and accounts you can include. Strategies to stay within the limit:

- Use versioned transactions with Address Lookup Tables (ALTs)
- Minimize the number of accounts per instruction
- Combine related operations into single instructions where supported
- Split complex operations across multiple transactions

### Instruction Format

Each instruction contains three fields:

```
Instruction {
    program_id_index: u8,      // Index into the account keys array
    accounts: [u8],            // Indices into account keys array
    data: [u8],                // Opaque byte array interpreted by the program
}
```

### Account Meta

Every account referenced in an instruction has metadata:

```
AccountMeta {
    pubkey: Pubkey,            // 32-byte public key
    is_signer: bool,           // Must sign the transaction
    is_writable: bool,         // Will be written to by this instruction
}
```

The four combinations determine the account's role:

| is_signer | is_writable | Role |
|-----------|-------------|------|
| true | true | Fee payer, token owner performing transfer |
| true | false | Multisig co-signer, read-only authority |
| false | true | Destination account, PDA being written |
| false | false | Program ID, sysvar, clock |

## Legacy vs Versioned Transactions

### Legacy Transactions

The original format. All accounts must be listed in the account keys array. With the 1232-byte limit, you can fit roughly 20-35 accounts depending on instruction data size.

### Versioned Transactions (v0)
````
END THIRD-PARTY FILE 079e5e917953a0c4

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First 2819 of 12371 bytes. © agiprolabs · MIT · https://github.com/agiprolabs/claude-trading-skills/tree/HEAD/skills/solana-tx-building/SKILL.md

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