d50286a9a5
Packages: core (BIP39/32/44/49/84/86 derivation, WIF), keystore (PBKDF2 + AES-GCM), psbt, p2p (BIP157/158 SPV daemon, Dandelion++ broadcast with relay-echo verification), blockbook, rpc, electrum, net, bns, web-ui (React/Vite), mobile (Expo). ops/ holds the nginx vhost, systemd unit and push.sh deploy script for digibyte.x/web.
33 lines
1.5 KiB
Markdown
33 lines
1.5 KiB
Markdown
# @dgb-wallet/psbt
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DigiByte transaction construction and signing via PSBT (BIP174).
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- `buildPsbt({ inputs, outputs })` — construct an unsigned PSBT from UTXOs and outputs, BIP69 sorted by default
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- `signAllInputs(psbt, keyPair)` — sign every input with an ECPair; fails loudly if any input can't be signed
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- `finalizeAndExtract(psbt)` — after signing, produce broadcast-ready `{ hex, txid }`
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- `feeSats(psbt)` / `feeRateSatsPerByte(psbt)` — inspect fee before broadcasting
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Supports BIP44 (P2PKH), BIP49 (P2SH-P2WPKH), BIP84 (P2WPKH), BIP86 (P2TR) inputs. Depends on `@dgb-wallet/core` for network params.
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## Demo
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```bash
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cd "D:\Dev\SilentCode\Digibyte"
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npm install # first time only, sets up the workspace
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npm run demo -w @dgb-wallet/psbt
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```
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Derives a key from the public BIP39 test seed, constructs a PSBT spending a synthetic UTXO to two outputs, signs it, and prints the raw transaction hex. The UTXO is fake so this cannot be broadcast — but every other step (derivation, PSBT construction, signature, finalization) is real and identical to what a broadcastable transaction would use. Feed a real UTXO from `scantxoutset` / Blockbook / Electrum-DGB and the same code produces a live transaction.
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## Layout
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```
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src/
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types.ts — Utxo, Output, BuildParams shapes
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build.ts — buildPsbt with BIP69 sorting
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sign.ts — signAllInputs, finalizeAndExtract, fee inspection
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index.ts — re-exports
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scripts/
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build-tx-demo.ts — end-to-end seed → signed-tx demo
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```
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