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Taproot: add support for Taproot descriptors #1710

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merged 5 commits into from Jul 19, 2021
Merged

Taproot: add support for Taproot descriptors #1710

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5557ded
feat(common): add support for Taproot input and output scripts
prusnak Jul 15, 2021
8af2e6e
feat(core): add support for Taproot descriptors
prusnak Jul 15, 2021
ebfcc54
feat(legacy): add support for Taproot descriptors
prusnak Jul 15, 2021
4cf83e7
feat(python): add support for Taproot descriptors
prusnak Jul 15, 2021
d04866e
feat(tests): add tests for Taproot descriptors support
prusnak Jul 15, 2021
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2 changes: 2 additions & 0 deletions common/protob/messages-bitcoin.proto
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Expand Up @@ -17,6 +17,7 @@ enum InputScriptType {
EXTERNAL = 2; // reserved for external inputs (coinjoin)
SPENDWITNESS = 3; // native SegWit
SPENDP2SHWITNESS = 4; // SegWit over P2SH (backward compatible)
SPENDTAPROOT = 5; // Taproot
}

/**
Expand All @@ -29,6 +30,7 @@ enum OutputScriptType {
PAYTOOPRETURN = 3; // op_return
PAYTOWITNESS = 4; // only for change output
PAYTOP2SHWITNESS = 5; // only for change output
PAYTOTAPROOT = 6; // only for change output
}

/**
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1 change: 1 addition & 0 deletions core/.changelog.d/1710.added
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@@ -0,0 +1 @@
Support for Taproot descriptors
7 changes: 6 additions & 1 deletion core/src/apps/bitcoin/get_public_key.py
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Expand Up @@ -20,7 +20,12 @@ async def get_public_key(ctx: wire.Context, msg: GetPublicKey) -> PublicKey:
node = keychain.derive(msg.address_n)

if (
script_type in (InputScriptType.SPENDADDRESS, InputScriptType.SPENDMULTISIG)
script_type
in (
InputScriptType.SPENDADDRESS,
InputScriptType.SPENDMULTISIG,
InputScriptType.SPENDTAPROOT,
)
and coin.xpub_magic is not None
):
node_xpub = node.serialize_public(coin.xpub_magic)
Expand Down
1 change: 1 addition & 0 deletions core/src/trezor/enums/InputScriptType.py
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Expand Up @@ -7,3 +7,4 @@
EXTERNAL = 2
SPENDWITNESS = 3
SPENDP2SHWITNESS = 4
SPENDTAPROOT = 5
1 change: 1 addition & 0 deletions core/src/trezor/enums/OutputScriptType.py
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Expand Up @@ -8,3 +8,4 @@
PAYTOOPRETURN = 3
PAYTOWITNESS = 4
PAYTOP2SHWITNESS = 5
PAYTOTAPROOT = 6
2 changes: 2 additions & 0 deletions core/src/trezor/enums/__init__.py
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Expand Up @@ -278,6 +278,7 @@ class InputScriptType(IntEnum):
EXTERNAL = 2
SPENDWITNESS = 3
SPENDP2SHWITNESS = 4
SPENDTAPROOT = 5

class OutputScriptType(IntEnum):
PAYTOADDRESS = 0
Expand All @@ -286,6 +287,7 @@ class OutputScriptType(IntEnum):
PAYTOOPRETURN = 3
PAYTOWITNESS = 4
PAYTOP2SHWITNESS = 5
PAYTOTAPROOT = 6

class DecredStakingSpendType(IntEnum):
SSGen = 0
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1 change: 1 addition & 0 deletions legacy/firmware/.changelog.d/1710.added
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@@ -0,0 +1 @@
Support for Taproot descriptors
3 changes: 2 additions & 1 deletion legacy/firmware/fsm_msg_coin.h
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Expand Up @@ -61,7 +61,8 @@ void fsm_msgGetPublicKey(const GetPublicKey *msg) {
}

if (coin->xpub_magic && (script_type == InputScriptType_SPENDADDRESS ||
script_type == InputScriptType_SPENDMULTISIG)) {
script_type == InputScriptType_SPENDMULTISIG ||
script_type == InputScriptType_SPENDTAPROOT)) {
hdnode_serialize_public(node, fingerprint, coin->xpub_magic, resp->xpub,
sizeof(resp->xpub));
} else if (coin->has_segwit &&
Expand Down
1 change: 1 addition & 0 deletions python/.changelog.d/1710.added
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@@ -0,0 +1 @@
Support for Taproot descriptors
5 changes: 5 additions & 0 deletions python/src/trezorlib/cli/btc.py
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Expand Up @@ -30,6 +30,7 @@
"pkh": messages.InputScriptType.SPENDADDRESS,
"wpkh": messages.InputScriptType.SPENDWITNESS,
"sh-wpkh": messages.InputScriptType.SPENDP2SHWITNESS,
"tr": messages.InputScriptType.SPENDTAPROOT,
}

OUTPUT_SCRIPTS = {
Expand All @@ -39,6 +40,7 @@
"pkh": messages.OutputScriptType.PAYTOADDRESS,
"wpkh": messages.OutputScriptType.PAYTOWITNESS,
"sh-wpkh": messages.OutputScriptType.PAYTOP2SHWITNESS,
"tr": messages.OutputScriptType.PAYTOTAPROOT,
}

DEFAULT_COIN = "Bitcoin"
Expand Down Expand Up @@ -206,6 +208,9 @@ def _get_descriptor(client, coin, account, script_type, show_display):
elif script_type == messages.InputScriptType.SPENDWITNESS:
acc_type = 84
fmt = "wpkh({})"
elif script_type == messages.InputScriptType.SPENDTAPROOT:
acc_type = 86
fmt = "tr({})"
else:
raise ValueError("Unsupported account type")

Expand Down
2 changes: 2 additions & 0 deletions python/src/trezorlib/messages.py
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Expand Up @@ -286,6 +286,7 @@ class InputScriptType(IntEnum):
EXTERNAL = 2
SPENDWITNESS = 3
SPENDP2SHWITNESS = 4
SPENDTAPROOT = 5


class OutputScriptType(IntEnum):
Expand All @@ -295,6 +296,7 @@ class OutputScriptType(IntEnum):
PAYTOOPRETURN = 3
PAYTOWITNESS = 4
PAYTOP2SHWITNESS = 5
PAYTOTAPROOT = 6


class DecredStakingSpendType(IntEnum):
Expand Down
36 changes: 36 additions & 0 deletions tests/device_tests/test_descriptors.py
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Expand Up @@ -128,6 +128,42 @@
"wpkh([5c9e228d/84'/1'/1']tpubDCZB6sR48s4T6xoXqaYxScvf23kmQvg5QpyFkYnDBjsmviKHLSG9s6cp593Exg87tuMjXXMWDvBRXnJtzppcQf8Z8HdJP1rothfxm4qnPXo/1/*)#qrgjqk5h",
),
),
(
"Bitcoin",
0,
messages.InputScriptType.SPENDTAPROOT,
(
"tr([5c9e228d/86'/0'/0']xpub6Bw885JisRbcKmowfBvMmCxaFHodKn1VpmRmctmJJoM8D4DzyP4qJv8ZdD9V9r3SSGjmK2KJEDnvLH6f1Q4HrobEvnCeKydNvf1eir3RHZk/0/*)#d8jj22qr",
"tr([5c9e228d/86'/0'/0']xpub6Bw885JisRbcKmowfBvMmCxaFHodKn1VpmRmctmJJoM8D4DzyP4qJv8ZdD9V9r3SSGjmK2KJEDnvLH6f1Q4HrobEvnCeKydNvf1eir3RHZk/1/*)#unhnhlsm",
),
),
(
"Bitcoin",
1,
messages.InputScriptType.SPENDTAPROOT,
(
"tr([5c9e228d/86'/0'/1']xpub6Bw885JisRbcLp1379q64fdNPGTnHKYGcA9wcWqGcUgkKZkYCwXSCb9Qfw8DGDgYMmcDM8QwQGooqCM3Ym4yq8kS5dBjzZSXUdVUdhyfirD/0/*)#dq8u44kn",
"tr([5c9e228d/86'/0'/1']xpub6Bw885JisRbcLp1379q64fdNPGTnHKYGcA9wcWqGcUgkKZkYCwXSCb9Qfw8DGDgYMmcDM8QwQGooqCM3Ym4yq8kS5dBjzZSXUdVUdhyfirD/1/*)#u5zagqxt",
),
),
(
"Testnet",
0,
messages.InputScriptType.SPENDTAPROOT,
(
"tr([5c9e228d/86'/1'/0']tpubDC88gkaZi5HvJGxGDNLADkvtdpni3mLmx6vr2KnXmWMG8zfkBRggsxHVBkUpgcwPe2KKpkyvTJCdXHb1UHEWE64vczyyPQfHr1skBcsRedN/0/*)#4rqwxvej",
"tr([5c9e228d/86'/1'/0']tpubDC88gkaZi5HvJGxGDNLADkvtdpni3mLmx6vr2KnXmWMG8zfkBRggsxHVBkUpgcwPe2KKpkyvTJCdXHb1UHEWE64vczyyPQfHr1skBcsRedN/1/*)#yh90mef2",
),
),
(
"Testnet",
1,
messages.InputScriptType.SPENDTAPROOT,
(
"tr([5c9e228d/86'/1'/1']tpubDC88gkaZi5HvKcrFLNkZwcXx1YyShkmPTkSNoP5MHQnSP9vTrKEYKtoeEkX4oEJmNYSm6Y3fFcNV4xbkDE1uZZBmJe1ircegxgVnBW8j4SL/0/*)#7254x7qg",
"tr([5c9e228d/86'/1'/1']tpubDC88gkaZi5HvKcrFLNkZwcXx1YyShkmPTkSNoP5MHQnSP9vTrKEYKtoeEkX4oEJmNYSm6Y3fFcNV4xbkDE1uZZBmJe1ircegxgVnBW8j4SL/1/*)#0735mtss",
),
),
)


Expand Down