validate_tx.h File Reference

#include "base_tx.h"

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Functions
void	create_blank_sig_txhash (unsigned char *blank_hash, Transaction *tx)
	Create a copy of a transaction with blank signatures and hash it for signature validation. More...
int	check_input_unlockable (Input *input, unsigned char *blank_tx_hash)
	Check if a given input is unlockable iwth it's unlock script. More...
int	validate_input_matches_utxopool (Input *input)
	Check if the inputs to a transaction exists in the utxo pool ignoring spent flag now. This cna likely be replaced by just checkign to see if the tx is in the mempool. More...
int	validate_input (Input *input, unsigned char *blank_tx_hash)
	Wrapper to validate a transactions input in various ways, inputs size, utxo available, unlockable. More...
int	validate_tx_parts_not_null (Transaction *tx)
	Check if a Transaction (Not a coinbase tx) is malformed this should be the first check run on a transaction. More...
int	validate_coinbase_tx_parts_not_null (Transaction *tx)
	Check if a coinbase TX has a Null value in an improper place. More...
int	validate_tx_shared (Transaction *tx)
	Overall wrapper to validate an entire transaction that is NOT a Coinbase_tx. More...
int	check_tx_double_spent (Transaction *tx)
	Check if UTXO is double-spent in a transaction. More...
int	check_inputs_not_in_mempool (Transaction *tx)
	Check if an UTXO in a transaction is already referenced in the mempool. More...
int	validate_tx_incoming (Transaction *tx)
	Validate incoming transactions from the network (different than block transaction validation) More...

Detailed Description

Author

Nathan Faber nfabe.nosp@m.r@ol.nosp@m.in.ed.nosp@m.u

Version

0.1

Date

2022-03-20

Copyright

Copyright (c) 2022

Function Documentation

check_input_unlockable()

int check_input_unlockable	(	Input *	input,
		unsigned char *	blank_tx_hash
	)

Check if a given input is unlockable iwth it's unlock script.

Parameters

input	input to check
blank_tx_hash	blank tx hash that the tx was signed with

Returns

int 0 if unlockable not zero if unusable

check_inputs_not_in_mempool()

int check_inputs_not_in_mempool

(

Transaction *

tx

)

Check if an UTXO in a transaction is already referenced in the mempool.

Parameters

tx	transaction to check

Returns

int 0 if valid, not zero if conflict found

check_tx_double_spent()

int check_tx_double_spent

(

Transaction *

tx

)

Check if UTXO is double-spent in a transaction.

Parameters

tx	transaction to check

Returns

int 0 if valid, not zero if invalid

create_blank_sig_txhash()

void create_blank_sig_txhash	(	unsigned char *	blank_hash,
		Transaction *	tx
	)

Create a copy of a transaction with blank signatures and hash it for signature validation.

Parameters

blank_hash	destination for the blank signature hash
tx	transaction to blank and hash

validate_coinbase_tx_parts_not_null()

int validate_coinbase_tx_parts_not_null

(

Transaction *

tx

)

Check if a coinbase TX has a Null value in an improper place.

Parameters

tx	coinbase tx to check

Returns

int 0 if a valid transaction, not zero if invalid

validate_input()

int validate_input	(	Input *	input,
		unsigned char *	blank_tx_hash
	)

Wrapper to validate a transactions input in various ways, inputs size, utxo available, unlockable.

Parameters

input	input to validate
blank_tx_hash	tx hash of the larger transaction with signatures blanked

Returns

int 0 if valid input, not zero if invalid input

validate_input_matches_utxopool()

int validate_input_matches_utxopool

(

Input *

input

)

Check if the inputs to a transaction exists in the utxo pool ignoring spent flag now. This cna likely be replaced by just checkign to see if the tx is in the mempool.

Parameters

input

input to validate

Returns

int 0 if input referneces a valid utxo, not zero if not

validate_tx_incoming()

int validate_tx_incoming

(

Transaction *

tx

)

Validate incoming transactions from the network (different than block transaction validation)

Parameters

tx	transaction to validate

Returns

int 0 if incoming tx is valid, not zero if invalid

validate_tx_parts_not_null()

int validate_tx_parts_not_null

(

Transaction *

tx

)

Check if a Transaction (Not a coinbase tx) is malformed this should be the first check run on a transaction.

Parameters

tx	transaction to validate

Returns

int 0 if transaction is valid, not zero if nor

validate_tx_shared()

int validate_tx_shared

(

Transaction *

tx

)

Overall wrapper to validate an entire transaction that is NOT a Coinbase_tx.

Parameters

tx	transaction to validate

Returns

int 0 if transaction is valid, not zero if invalid