dlc

ddk-dlc

Low-level primitives for creating, signing, and verifying Bitcoin transactions used in Discreet Log Contract (DLC) protocols.

This crate handles all DLC transaction types including funding, contract execution transactions (CETs), refund transactions, and DLC channel operations.

Transaction Creation

use ddk_dlc::{create_dlc_transactions, PartyParams};

// Create complete set of DLC transactions
let dlc_txs = create_dlc_transactions(
    &offer_params,
    &accept_params,
    &payouts,
    refund_lock_time,
    fee_rate,
    fund_lock_time,
    cet_lock_time,
    fund_output_serial_id,
)?;

// Access individual transactions
let fund_tx = dlc_txs.fund;
let cets = dlc_txs.cets;
let refund_tx = dlc_txs.refund;

Adaptor Signatures

use ddk_dlc::{create_cet_adaptor_sig_from_oracle_info, sign_cet};

// Create adaptor signature for CET
let adaptor_sig = create_cet_adaptor_sig_from_oracle_info(
    &secp,
    &cet,
    &adaptor_info,
    &funding_script_pubkey,
    fund_output_value,
    &secret_key,
)?;

// Sign CET with oracle attestation
let signed_cet = sign_cet(
    &secp,
    &cet,
    &adaptor_sig,
    &oracle_signatures,
    &funding_script_pubkey,
    fund_output_value,
    &own_secret_key,
)?;

Key Functions

Function	Description
create_dlc_transactions	Create complete set of DLC transactions
create_fund_transaction	Create 2-of-2 multisig funding transaction
create_cet / create_cets	Create contract execution transaction(s)
create_refund_transaction	Create refund transaction
create_cet_adaptor_sig_from_oracle_info	Create adaptor signature for CET
sign_cet	Sign CET with oracle attestation
verify_cet_adaptor_sig_from_oracle_info	Verify adaptor signature

Channel Operations

The channel module provides functions for DLC channels:

• create_channel_transactions - Create DLC channel transactions with revocation
• create_buffer_transaction - Create buffer transaction for revocation
• create_settle_transaction - Create settle transaction
• create_collaborative_close_transaction - Create collaborative close

Features

Feature	Description
std	Standard library support (default)
no-std	No standard library for embedded/WASM
use-serde	Serde serialization support

License

This project is licensed under the MIT License.