ddk_manager/contract/
signed_contract.rs

1//! #SignedContract
2
3use crate::conversion_utils::PROTOCOL_VERSION;
4use crate::utils::get_new_serial_id;
5use crate::ChannelId;
6
7use super::accepted_contract::AcceptedContract;
8use ddk_dlc::dlc_input::DlcInputInfo;
9use ddk_messages::CetAdaptorSignature;
10use ddk_messages::CetAdaptorSignatures;
11use ddk_messages::FundingSignatures;
12use ddk_messages::SignDlc;
13use secp256k1_zkp::ecdsa::Signature;
14use secp256k1_zkp::EcdsaAdaptorSignature;
15
16/// Contain information about a contract that was fully signed.
17#[derive(Clone)]
18pub struct SignedContract {
19    /// The accepted contract that was signed.
20    pub accepted_contract: AcceptedContract,
21    /// The adaptor signatures of the offering party (None if offering party).
22    pub adaptor_signatures: Option<Vec<EcdsaAdaptorSignature>>,
23    /// The refund signature of the offering party.
24    pub offer_refund_signature: Signature,
25    /// The signatures for the funding inputs of the offering party.
26    pub funding_signatures: FundingSignatures,
27    /// The [`ChannelId`] to which the contract was associated if any.
28    pub channel_id: Option<ChannelId>,
29}
30
31impl SignedContract {
32    pub(crate) fn get_sign_dlc(
33        &self,
34        cet_adaptor_signatures: Vec<EcdsaAdaptorSignature>,
35    ) -> SignDlc {
36        let contract_id = self.accepted_contract.get_contract_id();
37
38        SignDlc {
39            protocol_version: PROTOCOL_VERSION,
40            contract_id,
41            cet_adaptor_signatures: CetAdaptorSignatures {
42                ecdsa_adaptor_signatures: cet_adaptor_signatures
43                    .into_iter()
44                    .map(|x| CetAdaptorSignature { signature: x })
45                    .collect(),
46            },
47            refund_signature: self.offer_refund_signature,
48            funding_signatures: self.funding_signatures.clone(),
49        }
50    }
51
52    /// Use an existing contract to create a funding input for a spliced DLC.
53    pub(crate) fn get_dlc_input(&self) -> DlcInputInfo {
54        let fund_tx = self.accepted_contract.dlc_transactions.fund.clone();
55
56        let fund_vout = self
57            .accepted_contract
58            .dlc_transactions
59            .get_fund_output_index() as u32;
60        let local_fund_pubkey = self
61            .accepted_contract
62            .offered_contract
63            .offer_params
64            .fund_pubkey;
65        let remote_fund_pubkey = self.accepted_contract.accept_params.fund_pubkey;
66        let fund_amount = self
67            .accepted_contract
68            .dlc_transactions
69            .get_fund_output()
70            .value;
71
72        DlcInputInfo {
73            fund_tx,
74            fund_vout,
75            local_fund_pubkey,
76            remote_fund_pubkey,
77            fund_amount,
78            max_witness_len: 220,
79            input_serial_id: get_new_serial_id(),
80            contract_id: self.accepted_contract.get_contract_id(),
81        }
82    }
83}
ddk_manager/contract/signed_contract.rs

ddk_manager/contract/
signed_contract.rs
