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docs: add docs for additional libconsensus functions

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Co-authored-by: Bruno Garcia <brunoely.gc@gmail.com>
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Jake Rawsthorne 2021-02-14 23:14:22 +00:00 committed by brunoerg
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doc/shared-libraries.md
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@ -11,13 +11,14 @@ The interface is defined in the C header `bitcoinconsensus.h` located in `src/sc
#### Version
`bitcoinconsensus_version` returns an `unsigned int` with the API version *(currently `1`)*.
`bitcoinconsensus_version` returns an `unsigned int` with the API version *(currently `2`)*.
#### Script Validation
`bitcoinconsensus_verify_script` returns an `int` with the status of the verification. It will be `1` if the input script correctly spends the previous output `scriptPubKey`.
`bitcoinconsensus_verify_script`, `bitcoinconsensus_verify_script_with_amount` and `bitcoinconsensus_verify_script_with_spent_outputs` return an `int` with the status of the verification. It will be `1` if the input script correctly spends the previous output `scriptPubKey`.
##### Parameters
###### bitcoinconsensus_verify_script
- `const unsigned char *scriptPubKey` - The previous output script that encumbers spending.
- `unsigned int scriptPubKeyLen` - The number of bytes for the `scriptPubKey`.
- `const unsigned char *txTo` - The transaction with the input that is spending the previous output.
@ -26,6 +27,28 @@ The interface is defined in the C header `bitcoinconsensus.h` located in `src/sc
- `unsigned int flags` - The script validation flags *(see below)*.
- `bitcoinconsensus_error* err` - Will have the error/success code for the operation *(see below)*.
###### bitcoinconsensus_verify_script_with_amount
- `const unsigned char *scriptPubKey` - The previous output script that encumbers spending.
- `unsigned int scriptPubKeyLen` - The number of bytes for the `scriptPubKey`.
- `int64_t amount` - The amount spent in the input
- `const unsigned char *txTo` - The transaction with the input that is spending the previous output.
- `unsigned int txToLen` - The number of bytes for the `txTo`.
- `unsigned int nIn` - The index of the input in `txTo` that spends the `scriptPubKey`.
- `unsigned int flags` - The script validation flags *(see below)*.
- `bitcoinconsensus_error* err` - Will have the error/success code for the operation *(see below)*.
###### bitcoinconsensus_verify_script_with_spent_outputs
- `const unsigned char *scriptPubKey` - The previous output script that encumbers spending.
- `unsigned int scriptPubKeyLen` - The number of bytes for the `scriptPubKey`.
- `int64_t amount` - The amount spent in the input
- `const unsigned char *txTo` - The transaction with the input that is spending the previous output.
- `unsigned int txToLen` - The number of bytes for the `txTo`.
- `UTXO *spentOutputs` - Previous outputs spent in the transaction. `UTXO` is a struct composed by `const unsigned char *scriptPubKey`, `unsigned int scriptPubKeySize` (the number of bytes for the `scriptPubKey`) and `unsigned int value`.
- `unsigned int spentOutputsLen` - The number of bytes for the `spentOutputs`.
- `unsigned int nIn` - The index of the input in `txTo` that spends the `scriptPubKey`.
- `unsigned int flags` - The script validation flags *(see below)*.
- `bitcoinconsensus_error* err` - Will have the error/success code for the operation *(see below)*.
##### Script Flags
- `bitcoinconsensus_SCRIPT_FLAGS_VERIFY_NONE`
- `bitcoinconsensus_SCRIPT_FLAGS_VERIFY_P2SH` - Evaluate P2SH ([BIP16](https://github.com/bitcoin/bips/blob/master/bip-0016.mediawiki)) subscripts
@ -34,6 +57,7 @@ The interface is defined in the C header `bitcoinconsensus.h` located in `src/sc
- `bitcoinconsensus_SCRIPT_FLAGS_VERIFY_CHECKLOCKTIMEVERIFY` - Enable CHECKLOCKTIMEVERIFY ([BIP65](https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki))
- `bitcoinconsensus_SCRIPT_FLAGS_VERIFY_CHECKSEQUENCEVERIFY` - Enable CHECKSEQUENCEVERIFY ([BIP112](https://github.com/bitcoin/bips/blob/master/bip-0112.mediawiki))
- `bitcoinconsensus_SCRIPT_FLAGS_VERIFY_WITNESS` - Enable WITNESS ([BIP141](https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki))
- `bitcoinconsensus_SCRIPT_FLAGS_VERIFY_TAPROOT` - Enable TAPROOT ([BIP340](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki), [BIP341](https://github.com/bitcoin/bips/blob/master/bip-0341.mediawiki), [BIP342](https://github.com/bitcoin/bips/blob/master/bip-0342.mediawiki))
##### Errors
- `bitcoinconsensus_ERR_OK` - No errors with input parameters *(see the return value of `bitcoinconsensus_verify_script` for the verification status)*
@ -42,6 +66,8 @@ The interface is defined in the C header `bitcoinconsensus.h` located in `src/sc
- `bitcoinconsensus_ERR_DESERIALIZE` - An error deserializing `txTo`
- `bitcoinconsensus_ERR_AMOUNT_REQUIRED` - Input amount is required if WITNESS is used
- `bitcoinconsensus_ERR_INVALID_FLAGS` - Script verification `flags` are invalid (i.e. not part of the libconsensus interface)
- `bitcoinconsensus_ERR_SPENT_OUTPUTS_REQUIRED` - Spent outputs are required if TAPROOT is used
- `bitcoinconsensus_ERR_SPENT_OUTPUTS_MISMATCH` - Spent outputs size doesn't match tx inputs size
### Example Implementations
- [NBitcoin](https://github.com/MetacoSA/NBitcoin/blob/5e1055cd7c4186dee4227c344af8892aea54faec/NBitcoin/Script.cs#L979-#L1031) (.NET Bindings)