SpendingConditionVerification

cdk_common

Trait SpendingConditionVerification 

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pub trait SpendingConditionVerification {
    // Required methods
    fn inputs(&self) -> &Vec<Proof>;
    fn sig_all_msg_to_sign(&self) -> String;

    // Provided methods
    fn has_at_least_one_sig_all(&self) -> Result<bool, Error> { ... }
    fn verify_all_inputs_match_for_sig_all(&self) -> Result<(), Error> { ... }
    fn verify_spending_conditions(&self) -> Result<(), Error> { ... }
    fn verify_full_sig_all_check(&self) -> Result<(), Error> { ... }
    fn verify_inputs_individually(&self) -> Result<(), Error> { ... }
    fn verify_sig_all_p2pk(&self) -> Result<(), Error> { ... }
    fn verify_sig_all_htlc(&self) -> Result<(), Error> { ... }
}
Expand description

Trait for requests that spend proofs (SwapRequest, MeltRequest)

Required Methods§

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fn inputs(&self) -> &Vec<Proof>

Get the input proofs

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fn sig_all_msg_to_sign(&self) -> String

Construct the message to sign for SIG_ALL verification

This concatenates all relevant transaction data that must be signed. For swap: input secrets + output blinded messages For melt: input secrets + quote/payment request

Provided Methods§

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fn has_at_least_one_sig_all(&self) -> Result<bool, Error>

Check if at least one proof in the set has SIG_ALL flag set

SIG_ALL requires all proofs in the transaction to be signed. If any proof has this flag, we need to verify signatures on all proofs.

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fn verify_all_inputs_match_for_sig_all(&self) -> Result<(), Error>

Verify all inputs meet SIG_ALL requirements per NUT-11

When any input has SIG_ALL, all inputs must have:

  1. Same kind (P2PK or HTLC)
  2. SIG_ALL flag set
  3. Same Secret.data
  4. Same Secret.tags
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fn verify_spending_conditions(&self) -> Result<(), Error>

Verify spending conditions for this transaction

This is the main entry point for spending condition verification. It checks if any input has SIG_ALL and dispatches to the appropriate verification path.

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fn verify_full_sig_all_check(&self) -> Result<(), Error>

Verify spending conditions when SIG_ALL is present

When SIG_ALL is set, all proofs in the transaction must be signed together.

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fn verify_inputs_individually(&self) -> Result<(), Error>

Verify spending conditions for each input individually

Handles SIG_INPUTS mode, non-NUT-10 secrets, and any other case where inputs are verified independently rather than as a group. This function will NOT be called if any input has SIG_ALL.

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fn verify_sig_all_p2pk(&self) -> Result<(), Error>

Verify P2PK SIG_ALL signatures

Do NOT call this directly. This is called only from ‘verify_full_sig_all_check’, which has already done many important SIG_ALL checks. This performs the final signature verification for SIG_ALL+P2PK transactions.

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fn verify_sig_all_htlc(&self) -> Result<(), Error>

Verify HTLC SIG_ALL signatures

Do NOT call this directly. This is called only from ‘verify_full_sig_all_check’, which has already done many important SIG_ALL checks. This performs the final signature verification for SIG_ALL+HTLC transactions.

Implementors§