Implement verification states, time locks and required consensus rules

README.md

@@ -6,14 +6,12 @@ generic message signing and verification.
 
 ## Types of Signatures 
 
-At the moment this crate supports `P2TR`, `P2WPKH` and `P2SH-P2WPKH` single-sig
-addresses. Feedback through issues or PRs on the interface design and security
-is welcome and encouraged. 
+At the moment this crate supports `P2TR`, `P2WPKH`, `P2WSH`, `P2SH-P2WPKH`, `P2SH-P2WSH`, and `P2SH` (legacy multisig) addresses. Feedback through issues or PRs on the interface design and security is welcome and encouraged. 
 
 - [x] simple
 - [x] full 
-- [ ] full (proof-of-funds)
-- [ ] legacy (BIP-137)
+- [x] full (proof-of-funds)
+- [x] legacy (BIP-137)
 
 The goal is to provide a full signing and verifying library similar to
 [this](https://github.com/ACken2/bip322-js/tree/main) Javascript library.

examples/simple_sign_verify_encoded.rs

@@ -5,7 +5,7 @@ fn main() {
   let message = "Hello World";
   let wif_private_key = "L3VFeEujGtevx9w18HD1fhRbCH67Az2dpCymeRE1SoPK6XQtaN2k";
 
-  let base64_signature = sign_simple_encoded(address, message, wif_private_key).unwrap();
+  let base64_signature = sign_simple_encoded(address, message, &[wif_private_key], None).unwrap();
 
   assert!(verify_simple_encoded(address, message, &base64_signature).is_ok());
 }

src/error.rs

@@ -10,7 +10,7 @@ pub enum Error {
   },
   #[snafu(display("Failed to parse private key"))]
   PrivateKeyParse { source: bitcoin::key::FromWifError },
-  #[snafu(display("Unsuported address `{address}`, only P2TR, P2WPKH and P2SH-P2WPKH allowed"))]
+  #[snafu(display("Unsupported address `{address}`, type"))]
   UnsupportedAddress { address: String },
   #[snafu(display("Decode error for signature `{signature}`"))]
   SignatureDecode {
@@ -66,4 +66,26 @@ pub enum Error {
   InvalidWitness,
   #[snafu(display("Public key does not match"))]
   PublicKeyMismatch,
+  #[snafu(display("At least one private key is required"))]
+  NoPrivateKeys,
+  #[snafu(display("Non-standard sighash type: {source}"))]
+  SigHashTypeNonStandard {
+    source: bitcoin::sighash::NonStandardSighashTypeError,
+  },
+  #[snafu(display("Signer's public key not present in multisig script"))]
+  UnknownSigner,
+  #[snafu(display("Duplicate private key provided"))]
+  DuplicateSigner,
+  #[snafu(display("Multisig requires exactly {required} signatures, got {provided}"))]
+  SignatureCount { required: usize, provided: usize },
+  #[snafu(display("Invalid BIP-137 recovery flag `{flag}`"))]
+  InvalidRecoveryFlag { flag: u8 },
+  #[snafu(display("Invalid legacy signature: {source}"))]
+  LegacyRecover {
+    source: bitcoin::sign_message::MessageSignatureError,
+  },
+  #[snafu(display("Invalid proof input at index {index}: {reason}"))]
+  InvalidProofInput { index: usize, reason: String },
+  #[snafu(display("Cannot interpret script `{script}`"))]
+  UnknownScriptType { script: String },
 }