phadec

CLI tool for decoding Phantasma transactions (Carbon + VM) and hex-encoded event data.

Features

• Decode Carbon transactions (Call, Call_Multi, mint/burn/transfer).
• Decode VM transactions (script disassembly + method calls).
• Decode hex-encoded event data for classic events.
• JSON or pretty output.
• Optional ABI resolution from files or RPC.

Requirements

• Node.js with ESM support (Node 18+ recommended).

Installation

npm install
npm run build

Usage

phadec <txHex>
phadec tx --hex <txHex>
phadec tx --hash <txHash> --rpc <url>
phadec event --hex <eventHex> [--kind <eventKind>]

Options

• --format <json|pretty> Output format (default: pretty).
• --rpc <url> RPC endpoint for --hash (use JSON-RPC, e.g. https://pharpc1.phantasma.info/rpc).
• --resolve Fetch contracts from RPC and merge ABI for VM call decoding.
• --abi <path> ABI JSON file or directory (merged with built-ins).
• --vm-detail <all|calls|ops|none> Control VM output detail (default: all).
• --carbon-detail <all|call|msg|none> Control Carbon output detail (default: call).
• --protocol <number> Protocol version for interop ABI selection (default: latest known).
• --verbose Enable SDK logging.
• --kind <eventKind> Event kind hint for hex-encoded (classic) events (event mode only).
• --help Show help.

Examples

Decode a tx hash from RPC:

phadec tx --hash 155422A6882C3342933521DDC1A335292BF6448DBD489ED0BE21CFC74AFBA52A \
  --rpc https://pharpc1.phantasma.info/rpc \
  --format json \
  --vm-detail calls \
  --carbon-detail call

Decode a local tx hex (shorthand):

phadec 0xDEADBEEF...

Decode hex-encoded event data (classic event):

phadec event --hex 0xAABBCC... --kind TokenMint

Output

JSON output is stable and machine-friendly:

{
  "source": "tx-hash",
  "input": "155422A6...",
  "rpc": { "url": "https://...", "method": "getTransaction" },
  "carbon": { "...": "..." },
  "vm": { "...": "..." },
  "event": { "...": "..." },
  "warnings": [],
  "errors": []
}

Notes:

• Field carbon.call is the human-readable call decode (module/method + args).
• Field carbon.msg is the raw payload decode (moduleId/methodId + args hex).
• Use --carbon-detail to show one or both.
• Event hex decoding applies to classic events; newer structured events do not need hex decoding.
• If --kind is omitted in event mode, the tool returns raw hex with a warning.

Dev shortcuts

This repo ships a justfile:

• just list commands
• just b build
• just r <args> run dist/cli/index.js
• just d <args> run in dev mode (tsx)

Limitations

• --resolve depends on getContracts RPC output. If the RPC returns an empty set, VM calls remain unresolved.
• Unknown methods or argument types fall back to raw hex (no guessing).