| BitcoinPublicKey | Bitcoin public key representation (matches actual Bitcoin format) |
| BitcoinPublicKeyCoords | Legacy public key representation (for compatibility) |
| BitcoinAddress | Bitcoin address structure |
| BitcoinPrivateKey | Private key structure |
| TransactionInput | Bitcoin transaction input structure |
| TransactionOutput | Bitcoin transaction output structure |
| TransactionWitness | Bitcoin transaction witness data |
| BitcoinTransaction | Complete Bitcoin transaction structure |
| BTCDecoder | Bitcoin transaction decoder context |
| BTCEncoder | Bitcoin transaction encoder context |