diff options
Diffstat (limited to 'bip-0174.mediawiki')
| -rw-r--r-- | bip-0174.mediawiki | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/bip-0174.mediawiki b/bip-0174.mediawiki index a8f9ac8..95a5573 100644 --- a/bip-0174.mediawiki +++ b/bip-0174.mediawiki @@ -2,7 +2,7 @@ BIP: 174 Layer: Applications Title: Partially Signed Bitcoin Transaction Format - Author: Andrew Chow <achow101@gmail.com> + Author: Ava Chow <me@achow101.com> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0174 Status: Final @@ -120,7 +120,7 @@ The currently defined global types are as follows: | <tt>PSBT_GLOBAL_TX_VERSION = 0x02</tt> | None | No key data -| <tt><32-bit little endian uint version></tt> +| <tt><32-bit little endian int version></tt> | The 32-bit little endian signed integer representing the version number of the transaction being created. Note that this is not the same as the PSBT version number specified by the PSBT_GLOBAL_VERSION field. | 2 | 0 @@ -453,7 +453,7 @@ The currently defined per-input types are defined as follows: | Taproot Key BIP 32 Derivation Path | <tt>PSBT_IN_TAP_BIP32_DERIVATION = 0x16</tt> | <tt><32 byte xonlypubkey></tt> -| A 32 byte X-only public key involved in this input. It may be the internal key, or a key present in a leaf script. +| A 32 byte X-only public key involved in this input. It may be the output key, the internal key, or a key present in a leaf script. | <tt><compact size uint number of hashes> <32 byte leaf hash>* <4 byte fingerprint> <32-bit little endian uint path element>*</tt> | A compact size unsigned integer representing the number of leaf hashes, followed by a list of leaf hashes, followed by the 4 byte master key fingerprint concatenated with the derivation path of the public key. The derivation path is represented as 32-bit little endian unsigned integer indexes concatenated with each other. Public keys are those needed to spend this output. The leaf hashes are of the leaves which involve this public key. The internal key does not have leaf hashes, so can be indicated with a <tt>hashes len</tt> of 0. Finalizers should remove this field after <tt>PSBT_IN_FINAL_SCRIPTWITNESS</tt> is constructed. | @@ -591,7 +591,7 @@ determine which outputs are change outputs and verify that the change is returni | Taproot Key BIP 32 Derivation Path | <tt>PSBT_OUT_TAP_BIP32_DERIVATION = 0x07</tt> | <tt><32 byte xonlypubkey></tt> -| A 32 byte X-only public key involved in this output. It may be the internal key, or a key present in a leaf script. +| A 32 byte X-only public key involved in this output. It may be the output key, the internal key, or a key present in a leaf script. | <tt><compact size uint number of hashes> <32 byte leaf hash>* <4 byte fingerprint> <32-bit little endian uint path element>*</tt> | A compact size unsigned integer representing the number of leaf hashes, followed by a list of leaf hashes, followed by the 4 byte master key fingerprint concatenated with the derivation path of the public key. The derivation path is represented as 32-bit little endian unsigned integer indexes concatenated with each other. Public keys are those needed to spend this output. The leaf hashes are of the leaves which involve this public key. The internal key does not have leaf hashes, so can be indicated with a <tt>hashes len</tt> of 0. Finalizers should remove this field after <tt>PSBT_IN_FINAL_SCRIPTWITNESS</tt> is constructed. | @@ -633,7 +633,7 @@ values are valid, then it does not matter which is chosen as either way the tran ===Proprietary Use Type=== For all global, per-input, and per-output maps, the type <tt>0xFC</tt> is reserved for proprietary use. -The proprietary use type requires keys that follow the type with a compact size unsigned integer representing the length of the string identifer, followed by the string identifier, then a subtype, and finally any key data. +The proprietary use type requires keys that follow the type with a compact size unsigned integer representing the length of the string identifier, followed by the string identifier, then a subtype, and finally any key data. The identifier can be any variable length string that software can use to identify whether the particular data in the proprietary type can be used by it. It can also be the empty string although this is not recommended. @@ -718,15 +718,8 @@ sign_non_witness(script_code, i): if IsMine(key) and IsAcceptable(sighash_type): sign(non_witness_sighash(script_code, i, input)) -for input,i in enumerate(psbt.inputs): - if non_witness_utxo.exists: - assert(sha256d(non_witness_utxo) == psbt.tx.input[i].prevout.hash) - if redeemScript.exists: - assert(non_witness_utxo.vout[psbt.tx.input[i].prevout.n].scriptPubKey == P2SH(redeemScript)) - sign_non_witness(redeemScript, i) - else: - sign_non_witness(non_witness_utxo.vout[psbt.tx.input[i].prevout.n].scriptPubKey, i) - else if witness_utxo.exists: +for input, i in enumerate(psbt.inputs): + if witness_utxo.exists: if redeemScript.exists: assert(witness_utxo.scriptPubKey == P2SH(redeemScript)) script = redeemScript @@ -737,6 +730,13 @@ for input,i in enumerate(psbt.inputs): else if IsP2WSH(script): assert(script == P2WSH(witnessScript)) sign_witness(witnessScript, i) + else if non_witness_utxo.exists: + assert(sha256d(non_witness_utxo) == psbt.tx.input[i].prevout.hash) + if redeemScript.exists: + assert(non_witness_utxo.vout[psbt.tx.input[i].prevout.n].scriptPubKey == P2SH(redeemScript)) + sign_non_witness(redeemScript, i) + else: + sign_non_witness(non_witness_utxo.vout[psbt.tx.input[i].prevout.n].scriptPubKey, i) else: assert False </pre> @@ -800,7 +800,7 @@ A MIME type name will be added to this document once one has been registered. ==Extensibility== The Partially Signed Transaction format can be extended in the future by adding -new types for key-value pairs. Backwards compatibilty will still be maintained as those new +new types for key-value pairs. Backwards compatibility will still be maintained as those new types will be ignored and passed-through by signers which do not know about them. ===Version Numbers=== |