Sia Signing

C-based transaction parser and signer for Sia V2 transactions. Parses transaction blobs, displays transaction details for verification, and generates Ed25519 signatures.

Usage

1. Compile the signer
2. Run ./main
3. Paste transaction blob hex when prompted
4. Review displayed transaction details
5. Copy the generated signature

Mnemonic Configuration

Update the mnemonic in main.c:

const char* mnemonic = "PASTE YOUR MNEMONIC HERE";

Key Derivation

• Custom Sia key derivation (Blake2b-based)
• Address generation using Sia's unlock conditions

Transaction Verification

Displays:

• Full Sia addresses with checksums
• SC amounts in readable format
• Complete transaction breakdown

Signature Algorithm

• Ed25519 signatures
• Sia V2TransactionSemantics encoding
• Signature prefix: "sia/sig/input|" + replay protection