Function simfony_as_rust::jet::signature_hash_modes::sig_all_hash

pub fn sig_all_hash() -> u256

Return a SHA256 hash of the following:

• The result of genesis_block_hash (32 bytes).
• The result of genesis_block_hash again (32 bytes).
• The result of tx_hash (32 bytes).
• The result of tap_env_hash (32 bytes).
• The result of current_index (Note: this is in big endian format) (4 bytes).

Note: the two copies of the genesis_block_hash values effectively makes this result a BIP-340 style tagged hash.