WIF-compressed Table 4-4. The witness data in a bitcoin transaction testifies to the true ownership of the funds being spent. For example, to derive the public key, the function EC_point_mul is used. " address std:endl; std:cout "Secret: " bc:encode_hex(secret) std:endl; return 0; / Should never reach here!
Table 4-2 shows three common formats used to represent private keys. Transaction withdrawContract(transaction contractPayment, script redeemScript, uint64_t amount, data_chunk hashKey, ec_private key) transaction tx transaction / hash_digest utxoHash; / decode_hash(utxoHash, output_point utxo(contractPayment. A random 32 bytes. A P2SH address is created from a transaction script, which defines who can spend a transaction output (for more details, see Pay-to-Script-Hash (P2SH) ). Since the invention of public key cryptography, several suitable mathematical functions, such as prime number exponentiation and elliptic curve multiplication, have been discovered. Given two points P1 and P2 on the elliptic curve, there is a third point P3 P1 P2, also on the elliptic curve. The private key must also be backed up and protected from accidental loss, because if its lost it cannot be recovered and the funds secured by it are forever lost, too.
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