PSBT Skill

Provides PSBT (Partially Signed Bitcoin Transaction) construction and signing operations on the Bitcoin L1. PSBTs enable multi-party signing workflows such as ordinals marketplace purchases where both buyer and seller must sign before broadcast.

• estimate-fee — Read-only fee estimation for a PSBT given its structure.
• sign — Sign one or more PSBT inputs with the active unlocked wallet (P2WPKH or Taproot keys).
• broadcast — Finalize a fully signed PSBT and broadcast it to the Bitcoin network via mempool.space.

Usage

bun run psbt/psbt.ts <subcommand> [options]

Subcommands

estimate-fee

Estimate the network fee in satoshis for a given PSBT. Parses the transaction structure and computes vsize-based fee estimate for fast, medium, and slow fee tiers.