feat(cardano): add support for babbage features

core/src/apps/cardano/README.md

@@ -14,17 +14,17 @@ REVIEWER = Jan Matejek <jan.matejek@satoshilabs.com>, Tomas Susanka <tomas.susan
 
 [Cardano developer documentation](https://developers.cardano.org/) - official developer documentation.
 
-[Delegation Design Spec](https://hydra.iohk.io/build/2006688/download/1/delegation_design_spec.pdf) - contains information about delegation (addresses, certificates, withdrawals, ...).
+[Cardano Ledger repository](https://github.com/input-output-hk/cardano-ledger/tree/master) - design docs and CDDL specs for each Cardano era.
 
-[Multi Asset CDDL spec](https://github.com/input-output-hk/cardano-ledger-specs/blob/097890495cbb0e8b62106bcd090a5721c3f4b36f/shelley-ma/shelley-ma-test/cddl-files/shelley-ma.cddl).
+[CIPs](https://github.com/cardano-foundation/CIPs) - Cardano improvement proposals.
 
-[Plutus CDDL spec](https://github.com/input-output-hk/cardano-ledger/blob/9c3b4737b13b30f71529e76c5330f403165e28a6/eras/alonzo/test-suite/cddl-files/alonzo.cddl).
+[Delegation Design Spec](https://hydra.iohk.io/build/2006688/download/1/delegation_design_spec.pdf) - contains information about delegation (addresses, certificates, withdrawals, ...).
 
 [Byron address format](https://github.com/input-output-hk/cardano-wallet/wiki/About-Address-Format---Byron).
 
 [The Shelley 1852' purpose and staking path](https://github.com/input-output-hk/implementation-decisions/blob/e2d1bed5e617f0907bc5e12cf1c3f3302a4a7c42/text/1852-hd-chimeric.md).
 
-[cbor.me](http://cbor.me/) - very useful tool for CBOR inspection.
+[cbor.me](http://cbor.me/), [cbor.nemo157.com](https://cbor.nemo157.com/), [VS Code extension](https://marketplace.visualstudio.com/items?itemName=gabrielkerekes.cbor) - useful tools for CBOR inspection.
 
 
 ## Seed derivation schemes
@@ -184,7 +184,7 @@ For security and in some cases UX purposes we use transaction signing mode so th
 
 #### Ordinary transaction
 
-An ordinary transaction cannot contain a pool registration certificate or items related to Plutus script evaluation (collateral inputs and required signers). Also multi-sig (1854') witnesses can't be requested.
+An ordinary transaction cannot contain a pool registration certificate or items related to Plutus script evaluation (collateral inputs, ...). Also multi-sig (1854') witnesses can't be requested.
 
 #### Pool registration as owner
 
@@ -193,7 +193,7 @@ When signing a pool registration transaction as an owner, the transaction cannot
 - other certificates
 - withdrawals
 - token minting
-- items related to Plutus script evaluation (collateral inputs and required signers)
+- items related to Plutus script evaluation (collateral inputs, ...)
 
 Including inputs with a path would cause the transaction to be signed by such a path without letting the user know. Of course, we could let the user know that the transaction is being signed by the user's payment key, however, a pool owner should never be the one paying for the pool registration anyways so such a witness request doesn't make sense.
 
@@ -201,11 +201,17 @@ Just like a pool registration certificate, other certificates and withdrawals ar
 
 #### Multi-sig transaction
 
-Represents a multi-sig transaction using native scripts. Script credentials must be used in certificates and withdrawals when signing a multi-sig transaction. Ordinary (1852') witness requests are not allowed and all the witness requests are shown. Transaction cannot contain a pool registration certificate or items related to Plutus script evaluation (collateral inputs and required signers).
+Represents a multi-sig transaction using native scripts. Script credentials must be used in certificates and withdrawals when signing a multi-sig transaction. Ordinary (1852') witness requests are not allowed and all the witness requests are shown. Transaction cannot contain a pool registration certificate or items related to Plutus script evaluation (collateral inputs, ...).
 
 #### Plutus transaction
 
-The signing mode intended for transactions containing Plutus script evaluation. Plutus scripts may access all transaction items and make decisions based on them, therefore all items must be shown to the user. Since Plutus scripts may have many unforseen use cases, we put no further limitations on transactions (except forbidding pool registration certificates). Stake credentials in certificates and withdrawals may be given as key paths, key hashes or script hashes.
+The signing mode intended for transactions containing Plutus script evaluation. Plutus scripts may access almost all transaction items and make decisions based on them, therefore all items should be shown to the user.
+
+Even though Plutus scripts cannot access collateral inputs and the collateral return output, we must show them to the user so that they can verify what collateral amount is at stake. However, if the client declares this amount in the total collateral field, collateral inputs and the collateral return output (if it contains an address governed by the device) can be hidden.
+
+Collateral inputs, required signers, collateral return output, total collateral and reference inputs are allowed only in Plutus transactions.
+
+Since Plutus scripts may have many unforseen use cases, we put no further limitations on transactions (except forbidding pool registration certificates). Stake credentials in certificates and withdrawals may be given as key paths, key hashes or script hashes.
 
 ### Single account model
 
@@ -299,9 +305,13 @@ In order for the user to be able to verify native scripts a `get_native_script_h
 
 _Plutus script support has been added in the Cardano Alonzo era_
 
-When creating a UTXO with a Plutus script address (in any signing mode), it should also contain a `datum_hash` which provides additional UTXO-related data to the script. However, there are use cases for a `datum_hash` in an output controlled by a key, so we allow those as well.
+When creating a UTXO with a Plutus script address (in any signing mode), it should also contain a `datum_hash` or an `inline_datum` which provides additional UTXO-related data to the script. However, there are use cases for datums in an output controlled by a key, so we allow those as well.
+
+A UTXO can also contain a `reference_script` -- a script body that the user wants to embed in an output for later reference.
 
-When one wants to spend funds from the Plutus script address (which is possible only in the Plutus signing mode), they have to attach the Plutus script as well as the datum referenced in the UTXO and a corresponding redeemer. These items are outside the transaction body which is signed by Trezor, so their hash is included in transaction body as `script_data_hash`.
+Note that including `inline_datum` and/or `reference_script` requires using the `MAP_BABBAGE` (also known as post-Alonzo) output serialization format introduced in the Babbage era.
+
+When one wants to spend funds from a Plutus script address (which is possible only in the Plutus signing mode), they have to attach the Plutus script body as well as the datum referenced in the UTXO (if they did not utilize `inline_datum` and `reference_script` with `reference_inputs`). A redeemer must be provided too. These items are outside the transaction body which is signed by Trezor, so their hash is included in the transaction body as `script_data_hash`.
 
 ### Transaction Explorer
 
@@ -312,9 +322,9 @@ When one wants to spend funds from the Plutus script address (which is possible
 You can use a combination of [cardano-node](https://github.com/input-output-hk/cardano-node) and cardano-cli (part of the cardano-node repo) to submit a transaction.
 
 ## Serialization format
-Cardano uses [CBOR](https://www.rfc-editor.org/info/rfc7049) as a serialization format. [Here](https://github.com/input-output-hk/cardano-ledger/blob/9c3b4737b13b30f71529e76c5330f403165e28a6/eras/alonzo/test-suite/cddl-files/alonzo.cddl) is the [CDDL](https://tools.ietf.org/html/rfc8610) specification for after Plutus script support has been added.
+Cardano uses [CBOR](https://www.rfc-editor.org/info/rfc7049) as a serialization format. [Here](https://github.com/input-output-hk/cardano-ledger/blob/1cbf1fc2bb005a8206e5b5a7cdf44d35baaca455/eras/babbage/test-suite/cddl-files/babbage.cddl) is the [CDDL](https://tools.ietf.org/html/rfc8610) specification for Babbage era.
 
-#### Transaction body example
+### Transaction body example
 Input for trezorctl to sign the transaction can be found [here](https://gist.github.com/gabrielKerekes/ad6c168b12ebb43b082df5b92d67e276). The command to use is `trezorctl cardano sign-tx -f tx_for_readme.json -s ORDINARY_TRANSACTION`.
 
 ```
@@ -385,3 +395,10 @@ a900818258203b40265111d8bb3c3c608d95b3a0bf83461ace32d79336579a1939b3aad1c0b70001
   }
 }
 ```
+
+### Babbage-era transaction body example
+This Plutus transaction body contains elements introduced in the Babbage era (perhaps the most interesting elements with regards to the CBOR encoding are the inline datum and the reference script). You can use one of the CBOR inspection tools listed on top of this document to examine the transaction body structure.
+
+```
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
+```

core/src/apps/cardano/addresses.py

@@ -22,6 +22,14 @@ ADDRESS_TYPES_SHELLEY = (
     CardanoAddressType.REWARD_SCRIPT,
 )
 
+ADDRESS_TYPES_PAYMENT_KEY = (
+    CardanoAddressType.BASE,
+    CardanoAddressType.BASE_KEY_SCRIPT,
+    CardanoAddressType.POINTER,
+    CardanoAddressType.ENTERPRISE,
+    CardanoAddressType.BYRON,
+)
+
 ADDRESS_TYPES_PAYMENT_SCRIPT = (
     CardanoAddressType.BASE_SCRIPT_KEY,
     CardanoAddressType.BASE_SCRIPT_SCRIPT,
@@ -202,16 +210,7 @@ def validate_output_address_parameters(
 
     # Change outputs with script payment part are forbidden.
     # Reward addresses are forbidden as outputs in general, see also validate_output_address
-    assert_params_cond(
-        parameters.address_type
-        in (
-            CardanoAddressType.BASE,
-            CardanoAddressType.BASE_KEY_SCRIPT,
-            CardanoAddressType.POINTER,
-            CardanoAddressType.ENTERPRISE,
-            CardanoAddressType.BYRON,
-        )
-    )
+    assert_params_cond(parameters.address_type in ADDRESS_TYPES_PAYMENT_KEY)
 
 
 def assert_cond(condition: bool) -> None:

core/src/apps/cardano/layout.py

@@ -1,4 +1,4 @@
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Literal
 
 from trezor import messages, ui
 from trezor.enums import (
@@ -193,7 +193,7 @@ async def show_plutus_tx(ctx: wire.Context) -> None:
         ctx,
         "confirm_signing_mode",
         title="Confirm transaction",
-        content="Confirming a Plutus transaction - loss of collateral is possible. Check all items carefully.",
+        content="Confirming a Plutus transaction.",
         br_code=ButtonRequestType.Other,
     )
 
@@ -215,16 +215,24 @@ async def confirm_sending(
     ctx: wire.Context,
     ada_amount: int,
     to: str,
-    is_change_output: bool,
+    output_type: Literal["address", "change", "collateral-return"],
     network_id: int,
 ) -> None:
-    subtitle = "Change amount:" if is_change_output else "Confirm sending:"
+    if output_type == "address":
+        message = "Confirm sending"
+    elif output_type == "change":
+        message = "Change amount"
+    elif output_type == "collateral-return":
+        message = "Collateral return"
+    else:
+        raise RuntimeError  # should be unreachable
+
     await confirm_output(
         ctx,
         to,
         format_coin_amount(ada_amount, network_id),
         title="Confirm transaction",
-        subtitle=subtitle,
+        subtitle=f"{message}:",
         font_amount=ui.BOLD,
         width_paginated=17,
         to_str="\nto\n",
@@ -256,6 +264,68 @@ async def confirm_sending_token(
     )
 
 
+async def confirm_datum_hash(ctx: wire.Context, datum_hash: bytes) -> None:
+    await confirm_properties(
+        ctx,
+        "confirm_datum_hash",
+        title="Confirm transaction",
+        props=[
+            (
+                "Datum hash:",
+                bech32.encode(bech32.HRP_OUTPUT_DATUM_HASH, datum_hash),
+            ),
+        ],
+        br_code=ButtonRequestType.Other,
+    )
+
+
+async def confirm_inline_datum(
+    ctx: wire.Context, first_chunk: bytes, inline_datum_size: int
+) -> None:
+    await _confirm_data_chunk(
+        ctx,
+        "confirm_inline_datum",
+        "Inline datum",
+        first_chunk,
+        inline_datum_size,
+    )
+
+
+async def confirm_reference_script(
+    ctx: wire.Context, first_chunk: bytes, reference_script_size: int
+) -> None:
+    await _confirm_data_chunk(
+        ctx,
+        "confirm_reference_script",
+        "Reference script",
+        first_chunk,
+        reference_script_size,
+    )
+
+
+async def _confirm_data_chunk(
+    ctx: wire.Context, br_type: str, title: str, first_chunk: bytes, data_size: int
+) -> None:
+    MAX_DISPLAYED_SIZE = 56
+    displayed_bytes = first_chunk[:MAX_DISPLAYED_SIZE]
+    bytes_optional_plural = "byte" if data_size == 1 else "bytes"
+    props: list[tuple[str, bytes | None]] = [
+        (
+            f"{title} ({data_size} {bytes_optional_plural}):",
+            displayed_bytes,
+        )
+    ]
+    if data_size > MAX_DISPLAYED_SIZE:
+        props.append(("...", None))
+    await confirm_properties(
+        ctx,
+        br_type,
+        title="Confirm transaction",
+        props=props,
+        br_code=ButtonRequestType.Other,
+    )
+
+
 async def show_credentials(
     ctx: wire.Context,
     payment_credential: Credential,
@@ -350,12 +420,18 @@ async def warn_path(ctx: wire.Context, path: list[int], title: str) -> None:
     await confirm_path_warning(ctx, address_n_to_str(path), path_type=title)
 
 
-async def warn_tx_output_contains_tokens(ctx: wire.Context) -> None:
+async def warn_tx_output_contains_tokens(
+    ctx: wire.Context, is_collateral_return: bool = False
+) -> None:
+    if is_collateral_return:
+        content = "The collateral return\noutput contains tokens."
+    else:
+        content = "The following\ntransaction output\ncontains tokens."
     await confirm_metadata(
         ctx,
         "confirm_tokens",
         title="Confirm transaction",
-        content="The following\ntransaction output\ncontains tokens.",
+        content=content,
         larger_vspace=True,
         br_code=ButtonRequestType.Other,
     )
@@ -372,30 +448,12 @@ async def warn_tx_contains_mint(ctx: wire.Context) -> None:
     )
 
 
-async def warn_tx_output_contains_datum_hash(
-    ctx: wire.Context, datum_hash: bytes
-) -> None:
-    await confirm_properties(
-        ctx,
-        "confirm_datum_hash",
-        title="Confirm transaction",
-        props=[
-            (
-                "The following transaction output contains datum hash:",
-                bech32.encode(bech32.HRP_OUTPUT_DATUM_HASH, datum_hash),
-            ),
-            ("\nContinue?", None),
-        ],
-        br_code=ButtonRequestType.Other,
-    )
-
-
-async def warn_tx_output_no_datum_hash(ctx: wire.Context) -> None:
+async def warn_tx_output_no_datum(ctx: wire.Context) -> None:
     await confirm_metadata(
         ctx,
         "confirm_no_datum_hash",
         title="Confirm transaction",
-        content="The following transaction output contains a script address, but does not contain a datum hash.",
+        content="The following transaction output contains a script address, but does not contain a datum.",
         br_code=ButtonRequestType.Other,
     )
 
@@ -420,6 +478,16 @@ async def warn_no_collateral_inputs(ctx: wire.Context) -> None:
     )
 
 
+async def warn_unknown_total_collateral(ctx: wire.Context) -> None:
+    await confirm_metadata(
+        ctx,
+        "confirm_unknown_total_collateral",
+        title="Warning",
+        content="Unknown collateral amount, check all items carefully.",
+        br_code=ButtonRequestType.Other,
+    )
+
+
 async def confirm_witness_request(
     ctx: wire.Context,
     witness_path: list[int],
@@ -448,6 +516,7 @@ async def confirm_tx(
     protocol_magic: int,
     ttl: int | None,
     validity_interval_start: int | None,
+    total_collateral: int | None,
     is_network_id_verifiable: bool,
     tx_hash: bytes | None,
 ) -> None:
@@ -455,6 +524,11 @@ async def confirm_tx(
         ("Transaction fee:", format_coin_amount(fee, network_id)),
     ]
 
+    if total_collateral is not None:
+        props.append(
+            ("Total collateral:", format_coin_amount(total_collateral, network_id))
+        )
+
     if is_network_id_verifiable:
         props.append((f"Network: {protocol_magics.to_ui_string(protocol_magic)}", None))
 
@@ -778,6 +852,21 @@ async def confirm_collateral_input(
     )
 
 
+async def confirm_reference_input(
+    ctx: wire.Context, reference_input: messages.CardanoTxReferenceInput
+) -> None:
+    await confirm_properties(
+        ctx,
+        "confirm_reference_input",
+        title="Confirm transaction",
+        props=[
+            ("Reference input ID:", reference_input.prev_hash),
+            ("Reference input index:", str(reference_input.prev_index)),
+        ],
+        br_code=ButtonRequestType.Other,
+    )
+
+
 async def confirm_required_signer(
     ctx: wire.Context, required_signer: messages.CardanoTxRequiredSigner
 ) -> None:

core/src/apps/cardano/sign_tx/multisig_signer.py

@@ -21,11 +21,11 @@ class MultisigSigner(Signer):
 
     def _validate_tx_init(self) -> None:
         super()._validate_tx_init()
-        if (
-            self.msg.collateral_inputs_count != 0
-            or self.msg.required_signers_count != 0
-        ):
-            raise wire.ProcessError("Invalid tx signing request")
+        self._assert_tx_init_cond(self.msg.collateral_inputs_count == 0)
+        self._assert_tx_init_cond(self.msg.required_signers_count == 0)
+        self._assert_tx_init_cond(not self.msg.has_collateral_return)
+        self._assert_tx_init_cond(self.msg.total_collateral is None)
+        self._assert_tx_init_cond(self.msg.reference_inputs_count == 0)
 
     async def _show_tx_init(self) -> None:
         await layout.show_multisig_tx(self.ctx)
@@ -41,6 +41,7 @@ class MultisigSigner(Signer):
             self.msg.protocol_magic,
             self.msg.ttl,
             self.msg.validity_interval_start,
+            self.msg.total_collateral,
             is_network_id_verifiable,
             tx_hash=None,
         )

core/src/apps/cardano/sign_tx/ordinary_signer.py

@@ -27,11 +27,11 @@ class OrdinarySigner(Signer):
 
     def _validate_tx_init(self) -> None:
         super()._validate_tx_init()
-        if (
-            self.msg.collateral_inputs_count != 0
-            or self.msg.required_signers_count != 0
-        ):
-            raise wire.ProcessError("Invalid tx signing request")
+        self._assert_tx_init_cond(self.msg.collateral_inputs_count == 0)
+        self._assert_tx_init_cond(self.msg.required_signers_count == 0)
+        self._assert_tx_init_cond(not self.msg.has_collateral_return)
+        self._assert_tx_init_cond(self.msg.total_collateral is None)
+        self._assert_tx_init_cond(self.msg.reference_inputs_count == 0)
 
     async def _confirm_tx(self, tx_hash: bytes) -> None:
         # super() omitted intentionally
@@ -43,6 +43,7 @@ class OrdinarySigner(Signer):
             self.msg.protocol_magic,
             self.msg.ttl,
             self.msg.validity_interval_start,
+            self.msg.total_collateral,
             is_network_id_verifiable,
             tx_hash=None,
         )

core/src/apps/cardano/sign_tx/plutus_signer.py

@@ -24,12 +24,16 @@ class PlutusSigner(Signer):
     async def _show_tx_init(self) -> None:
         await layout.show_plutus_tx(self.ctx)
         await super()._show_tx_init()
+
         # These items should be present if a Plutus script is to be executed.
         if self.msg.script_data_hash is None:
             await layout.warn_no_script_data_hash(self.ctx)
         if self.msg.collateral_inputs_count == 0:
             await layout.warn_no_collateral_inputs(self.ctx)
 
+        if self.msg.total_collateral is None:
+            await layout.warn_unknown_total_collateral(self.ctx)
+
     async def _confirm_tx(self, tx_hash: bytes) -> None:
         # super() omitted intentionally
         # We display tx hash so that experienced users can compare it to the tx hash
@@ -43,10 +47,17 @@ class PlutusSigner(Signer):
             self.msg.protocol_magic,
             self.msg.ttl,
             self.msg.validity_interval_start,
+            self.msg.total_collateral,
             is_network_id_verifiable,
             tx_hash,
         )
 
+    def _should_show_tx_hash(self) -> bool:
+        # super() omitted intentionally
+        # Plutus txs tend to contain a lot of opaque data, some users might
+        # want to verify only the tx hash.
+        return True
+
     async def _show_input(self, input: messages.CardanoTxInput) -> None:
         # super() omitted intentionally
         # The inputs are not interchangeable (because of datums), so we must show them.

core/src/apps/cardano/sign_tx/pool_owner_signer.py

@@ -29,21 +29,15 @@ class PoolOwnerSigner(Signer):
 
     def _validate_tx_init(self) -> None:
         super()._validate_tx_init()
-        if (
-            self.msg.certificates_count != 1
-            or self.msg.withdrawals_count != 0
-            or self.msg.minting_asset_groups_count != 0
-        ):
-            raise wire.ProcessError(
-                "Stakepool registration transaction cannot contain other certificates, withdrawals or minting"
-            )
-
-        if (
-            self.msg.script_data_hash is not None
-            or self.msg.collateral_inputs_count != 0
-            or self.msg.required_signers_count != 0
-        ):
-            raise wire.ProcessError("Invalid tx signing request")
+        self._assert_tx_init_cond(self.msg.certificates_count == 1)
+        self._assert_tx_init_cond(self.msg.withdrawals_count == 0)
+        self._assert_tx_init_cond(self.msg.minting_asset_groups_count == 0)
+        self._assert_tx_init_cond(self.msg.script_data_hash is None)
+        self._assert_tx_init_cond(self.msg.collateral_inputs_count == 0)
+        self._assert_tx_init_cond(self.msg.required_signers_count == 0)
+        self._assert_tx_init_cond(not self.msg.has_collateral_return)
+        self._assert_tx_init_cond(self.msg.total_collateral is None)
+        self._assert_tx_init_cond(self.msg.reference_inputs_count == 0)
 
     async def _confirm_tx(self, tx_hash: bytes) -> None:
         # super() omitted intentionally
@@ -56,7 +50,12 @@ class PoolOwnerSigner(Signer):
 
     def _validate_output(self, output: messages.CardanoTxOutput) -> None:
         super()._validate_output(output)
-        if output.address_parameters is not None or output.datum_hash is not None:
+        if (
+            output.address_parameters is not None
+            or output.datum_hash is not None
+            or output.inline_datum_size > 0
+            or output.reference_script_size > 0
+        ):
             raise wire.ProcessError("Invalid output")
 
     def _should_show_output(self, output: messages.CardanoTxOutput) -> bool:

core/src/apps/cardano/sign_tx/signer.py

@@ -7,6 +7,7 @@ from trezor.crypto.curve import ed25519
 from trezor.enums import (
     CardanoAddressType,
     CardanoCertificateType,
+    CardanoTxOutputSerializationFormat,
     CardanoTxWitnessType,
 )
 
@@ -22,7 +23,11 @@ from ..helpers import (
 )
 from ..helpers.account_path_check import AccountPathChecker
 from ..helpers.credential import Credential, should_show_credentials
-from ..helpers.hash_builder_collection import HashBuilderDict, HashBuilderList
+from ..helpers.hash_builder_collection import (
+    HashBuilderDict,
+    HashBuilderEmbeddedCBOR,
+    HashBuilderList,
+)
 from ..helpers.paths import (
     CERTIFICATE_PATH_NAME,
     CHANGE_OUTPUT_PATH_NAME,
@@ -61,9 +66,22 @@ TX_BODY_KEY_SCRIPT_DATA_HASH = const(11)
 TX_BODY_KEY_COLLATERAL_INPUTS = const(13)
 TX_BODY_KEY_REQUIRED_SIGNERS = const(14)
 TX_BODY_KEY_NETWORK_ID = const(15)
+TX_BODY_KEY_COLLATERAL_RETURN = const(16)
+TX_BODY_KEY_TOTAL_COLLATERAL = const(17)
+TX_BODY_KEY_REFERENCE_INPUTS = const(18)
+
+BABBAGE_OUTPUT_KEY_ADDRESS = const(0)
+BABBAGE_OUTPUT_KEY_AMOUNT = const(1)
+BABBAGE_OUTPUT_KEY_DATUM_OPTION = const(2)
+BABBAGE_OUTPUT_KEY_REFERENCE_SCRIPT = const(3)
+
+DATUM_OPTION_KEY_HASH = const(0)
+DATUM_OPTION_KEY_INLINE = const(1)
 
 POOL_REGISTRATION_CERTIFICATE_ITEMS_COUNT = 10
 
+MAX_CHUNK_SIZE = 1024
+
 
 class Signer:
     """
@@ -84,6 +102,11 @@ class Signer:
         self.msg = msg
         self.keychain = keychain
 
+        # Some data (e.g. output inline datum) are too long to verify manually.
+        # We track their presence and eventually display the tx hash when
+        # confirming the tx.
+        self.has_hidden_data = False
+
         self.account_path_checker = AccountPathChecker()
 
         # Inputs, outputs and fee are mandatory, count the number of optional fields present.
@@ -99,6 +122,9 @@ class Signer:
                 msg.script_data_hash is not None,
                 msg.collateral_inputs_count > 0,
                 msg.required_signers_count > 0,
+                msg.has_collateral_return,
+                msg.total_collateral is not None,
+                msg.reference_inputs_count > 0,
             )
         )
         self.tx_dict: HashBuilderDict[int, Any] = HashBuilderDict(
@@ -193,9 +219,27 @@ class Signer:
         if self.msg.include_network_id:
             self.tx_dict.add(TX_BODY_KEY_NETWORK_ID, self.msg.network_id)
 
+        if self.msg.has_collateral_return:
+            await self._process_collateral_return()
+
+        if self.msg.total_collateral is not None:
+            self.tx_dict.add(TX_BODY_KEY_TOTAL_COLLATERAL, self.msg.total_collateral)
+
+        if self.msg.reference_inputs_count > 0:
+            reference_inputs_list: HashBuilderList[tuple[bytes, int]] = HashBuilderList(
+                self.msg.reference_inputs_count
+            )
+            with self.tx_dict.add(TX_BODY_KEY_REFERENCE_INPUTS, reference_inputs_list):
+                await self._process_reference_inputs(reference_inputs_list)
+
     def _validate_tx_init(self) -> None:
         if self.msg.fee > LOVELACE_MAX_SUPPLY:
             raise wire.ProcessError("Fee is out of range!")
+        if (
+            self.msg.total_collateral is not None
+            and self.msg.total_collateral > LOVELACE_MAX_SUPPLY
+        ):
+            raise wire.ProcessError("Total collateral is out of range!")
         validate_network_info(self.msg.network_id, self.msg.protocol_magic)
 
     async def _show_tx_init(self) -> None:
@@ -206,6 +250,10 @@ class Signer:
         # Final signing confirmation is handled separately in each signing mode.
         raise NotImplementedError
 
+    def _should_show_tx_hash(self) -> bool:
+        # By default, we display tx hash only if some data wasn't shown.
+        return self.has_hidden_data
+
     # inputs
 
     async def _process_inputs(
@@ -235,43 +283,41 @@ class Signer:
             output: messages.CardanoTxOutput = await self.ctx.call(
                 messages.CardanoTxItemAck(), messages.CardanoTxOutput
             )
-            self._validate_output(output)
-            await self._show_output(output)
-
-            output_address = self._get_output_address(output)
-
-            has_datum_hash = output.datum_hash is not None
-            output_list: HashBuilderList = HashBuilderList(2 + int(has_datum_hash))
-            with outputs_list.append(output_list):
-                output_list.append(output_address)
-                if output.asset_groups_count == 0:
-                    # output structure is: [address, amount, datum_hash?]
-                    output_list.append(output.amount)
-                else:
-                    # output structure is: [address, [amount, asset_groups], datum_hash?]
-                    output_value_list: HashBuilderList = HashBuilderList(2)
-                    with output_list.append(output_value_list):
-                        output_value_list.append(output.amount)
-                        asset_groups_dict: HashBuilderDict[
-                            bytes, HashBuilderDict[bytes, int]
-                        ] = HashBuilderDict(
-                            output.asset_groups_count,
-                            wire.ProcessError("Invalid token bundle in output"),
-                        )
-                        with output_value_list.append(asset_groups_dict):
-                            await self._process_asset_groups(
-                                asset_groups_dict,
-                                output.asset_groups_count,
-                                self._should_show_output(output),
-                            )
-                if has_datum_hash:
-                    output_list.append(output.datum_hash)
+            await self._process_output(outputs_list, output)
 
             total_amount += output.amount
 
         if total_amount > LOVELACE_MAX_SUPPLY:
             raise wire.ProcessError("Total transaction amount is out of range!")
 
+    async def _process_output(
+        self, outputs_list: HashBuilderList, output: messages.CardanoTxOutput
+    ) -> None:
+        self._validate_output(output)
+        should_show = self._should_show_output(output)
+        if should_show:
+            await self._show_output_init(output)
+
+        output_items_count = 2 + sum(
+            (
+                output.datum_hash is not None,
+                output.inline_datum_size > 0,
+                output.reference_script_size > 0,
+            )
+        )
+        if output.format == CardanoTxOutputSerializationFormat.ARRAY_LEGACY:
+            output_list: HashBuilderList = HashBuilderList(output_items_count)
+            with outputs_list.append(output_list):
+                await self._process_legacy_output(output_list, output, should_show)
+        elif output.format == CardanoTxOutputSerializationFormat.MAP_BABBAGE:
+            output_dict: HashBuilderDict[int, Any] = HashBuilderDict(
+                output_items_count, wire.ProcessError("Invalid output")
+            )
+            with outputs_list.append(output_dict):
+                await self._process_babbage_output(output_dict, output, should_show)
+        else:
+            raise RuntimeError  # should be unreachable
+
     def _validate_output(self, output: messages.CardanoTxOutput) -> None:
         if output.address_parameters is not None and output.address is not None:
             raise wire.ProcessError("Invalid output")
@@ -286,25 +332,35 @@ class Signer:
         else:
             raise wire.ProcessError("Invalid output")
 
+        # datum hash
         if output.datum_hash is not None:
             if len(output.datum_hash) != OUTPUT_DATUM_HASH_SIZE:
                 raise wire.ProcessError("Invalid output datum hash")
 
-        self.account_path_checker.add_output(output)
+        # inline datum
+        if output.inline_datum_size > 0:
+            if output.format != CardanoTxOutputSerializationFormat.MAP_BABBAGE:
+                raise wire.ProcessError("Invalid output")
 
-    async def _show_output(self, output: messages.CardanoTxOutput) -> None:
-        if not self._should_show_output(output):
-            return
+        # datum hash and inline datum are mutually exclusive
+        if output.datum_hash is not None and output.inline_datum_size > 0:
+            raise wire.ProcessError("Invalid output")
 
-        if output.datum_hash is not None:
-            await layout.warn_tx_output_contains_datum_hash(self.ctx, output.datum_hash)
+        # reference script
+        if output.reference_script_size > 0:
+            if output.format != CardanoTxOutputSerializationFormat.MAP_BABBAGE:
+                raise wire.ProcessError("Invalid output")
 
+        self.account_path_checker.add_output(output)
+
+    async def _show_output_init(self, output: messages.CardanoTxOutput) -> None:
         address_type = self._get_output_address_type(output)
         if (
             output.datum_hash is None
+            and output.inline_datum_size == 0
             and address_type in addresses.ADDRESS_TYPES_PAYMENT_SCRIPT
         ):
-            await layout.warn_tx_output_no_datum_hash(self.ctx)
+            await layout.warn_tx_output_no_datum(self.ctx)
 
         if output.asset_groups_count > 0:
             await layout.warn_tx_output_contains_tokens(self.ctx)
@@ -325,7 +381,7 @@ class Signer:
             self.ctx,
             output.amount,
             address,
-            self._is_change_output(output),
+            "change" if self._is_change_output(output) else "address",
             self.msg.network_id,
         )
 
@@ -340,24 +396,28 @@ class Signer:
 
     def _should_show_output(self, output: messages.CardanoTxOutput) -> bool:
         """
-        Determines whether the output should be shown. Extracted from _show_output because
-        of readability and because the same decision is made when displaying output tokens.
+        Determines whether the output should be shown. Extracted from _show_output
+        because of readability.
         """
-        if output.datum_hash is not None:
+        if (
+            output.datum_hash is not None
+            or output.inline_datum_size > 0
+            or output.reference_script_size > 0
+        ):
             return True
 
         address_type = self._get_output_address_type(output)
         if (
             output.datum_hash is None
+            and output.inline_datum_size == 0
             and address_type in addresses.ADDRESS_TYPES_PAYMENT_SCRIPT
         ):
-            # Plutus script address without a datum hash is unspendable, we must show a warning.
+            # Plutus script address without a datum is unspendable, we must show a warning.
             return True
 
-        if output.address_parameters is not None:  # change output
-            if not should_show_credentials(output.address_parameters):
-                # We don't need to display simple address outputs.
-                return False
+        if self._is_simple_change_output(output):
+            # We don't need to display simple address outputs.
+            return False
 
         return True
 
@@ -365,6 +425,111 @@ class Signer:
         """Used only to determine what message to show to the user when confirming sending."""
         return output.address_parameters is not None
 
+    def _is_simple_change_output(self, output: messages.CardanoTxOutput) -> bool:
+        """Used to determine whether an output is a change output with ordinary credentials."""
+        return output.address_parameters is not None and not should_show_credentials(
+            output.address_parameters
+        )
+
+    async def _process_legacy_output(
+        self,
+        output_list: HashBuilderList,
+        output: messages.CardanoTxOutput,
+        should_show: bool,
+    ) -> None:
+        address = self._get_output_address(output)
+        output_list.append(address)
+
+        if output.asset_groups_count == 0:
+            # Output structure is: [address, amount, datum_hash?]
+            output_list.append(output.amount)
+        else:
+            # Output structure is: [address, [amount, asset_groups], datum_hash?]
+            output_value_list: HashBuilderList = HashBuilderList(2)
+            with output_list.append(output_value_list):
+                await self._process_output_value(output_value_list, output, should_show)
+
+        if output.datum_hash is not None:
+            if should_show:
+                await layout.confirm_datum_hash(self.ctx, output.datum_hash)
+            output_list.append(output.datum_hash)
+
+    async def _process_babbage_output(
+        self,
+        output_dict: HashBuilderDict[int, Any],
+        output: messages.CardanoTxOutput,
+        should_show: bool,
+    ) -> None:
+        """
+        This output format corresponds to the post-Alonzo format in CDDL.
+        Note that it is to be used also for outputs with no Plutus elements.
+        """
+        address = self._get_output_address(output)
+        output_dict.add(BABBAGE_OUTPUT_KEY_ADDRESS, address)
+
+        if output.asset_groups_count == 0:
+            # Only amount is added to the dict.
+            output_dict.add(BABBAGE_OUTPUT_KEY_AMOUNT, output.amount)
+        else:
+            # [amount, asset_groups] is added to the dict.
+            output_value_list: HashBuilderList = HashBuilderList(2)
+            with output_dict.add(BABBAGE_OUTPUT_KEY_AMOUNT, output_value_list):
+                await self._process_output_value(output_value_list, output, should_show)
+
+        if output.datum_hash is not None:
+            if should_show:
+                await layout.confirm_datum_hash(self.ctx, output.datum_hash)
+            output_dict.add(
+                BABBAGE_OUTPUT_KEY_DATUM_OPTION,
+                (DATUM_OPTION_KEY_HASH, output.datum_hash),
+            )
+        elif output.inline_datum_size > 0:
+            inline_datum_list: HashBuilderList = HashBuilderList(2)
+            with output_dict.add(BABBAGE_OUTPUT_KEY_DATUM_OPTION, inline_datum_list):
+                inline_datum_list.append(DATUM_OPTION_KEY_INLINE)
+                inline_datum_cbor: HashBuilderEmbeddedCBOR = HashBuilderEmbeddedCBOR(
+                    output.inline_datum_size
+                )
+                with inline_datum_list.append(inline_datum_cbor):
+                    await self._process_inline_datum(
+                        inline_datum_cbor, output.inline_datum_size, should_show
+                    )
+
+        if output.reference_script_size > 0:
+            reference_script_cbor: HashBuilderEmbeddedCBOR = HashBuilderEmbeddedCBOR(
+                output.reference_script_size
+            )
+            with output_dict.add(
+                BABBAGE_OUTPUT_KEY_REFERENCE_SCRIPT, reference_script_cbor
+            ):
+                await self._process_reference_script(
+                    reference_script_cbor, output.reference_script_size, should_show
+                )
+
+    async def _process_output_value(
+        self,
+        output_value_list: HashBuilderList,
+        output: messages.CardanoTxOutput,
+        should_show_tokens: bool,
+    ) -> None:
+        """Should be used only when the output contains tokens."""
+        assert output.asset_groups_count > 0
+
+        output_value_list.append(output.amount)
+
+        asset_groups_dict: HashBuilderDict[
+            bytes, HashBuilderDict[bytes, int]
+        ] = HashBuilderDict(
+            output.asset_groups_count,
+            wire.ProcessError("Invalid token bundle in output"),
+        )
+        with output_value_list.append(asset_groups_dict):
+            await self._process_asset_groups(
+                asset_groups_dict,
+                output.asset_groups_count,
+                should_show_tokens,
+            )
+
     # asset groups
 
     async def _process_asset_groups(
@@ -444,6 +609,62 @@ class Signer:
         if len(token.asset_name_bytes) > MAX_ASSET_NAME_LENGTH:
             raise INVALID_TOKEN_BUNDLE
 
+    # inline datum
+
+    async def _process_inline_datum(
+        self,
+        inline_datum_cbor: HashBuilderEmbeddedCBOR,
+        inline_datum_size: int,
+        should_show: bool,
+    ) -> None:
+        assert inline_datum_size > 0
+        self.has_hidden_data = True
+
+        chunks_count = self._get_chunks_count(inline_datum_size)
+        for chunk_number in range(chunks_count):
+            chunk: messages.CardanoTxInlineDatumChunk = await self.ctx.call(
+                messages.CardanoTxItemAck(), messages.CardanoTxInlineDatumChunk
+            )
+            self._validate_chunk(
+                chunk.data,
+                chunk_number,
+                chunks_count,
+                wire.ProcessError("Invalid inline datum chunk"),
+            )
+            if chunk_number == 0 and should_show:
+                await layout.confirm_inline_datum(
+                    self.ctx, chunk.data, inline_datum_size
+                )
+            inline_datum_cbor.add(chunk.data)
+
+    # reference script
+
+    async def _process_reference_script(
+        self,
+        reference_script_cbor: HashBuilderEmbeddedCBOR,
+        reference_script_size: int,
+        should_show: bool,
+    ) -> None:
+        assert reference_script_size > 0
+        self.has_hidden_data = True
+
+        chunks_count = self._get_chunks_count(reference_script_size)
+        for chunk_number in range(chunks_count):
+            chunk: messages.CardanoTxReferenceScriptChunk = await self.ctx.call(
+                messages.CardanoTxItemAck(), messages.CardanoTxReferenceScriptChunk
+            )
+            self._validate_chunk(
+                chunk.data,
+                chunk_number,
+                chunks_count,
+                wire.ProcessError("Invalid reference script chunk"),
+            )
+            if chunk_number == 0 and should_show:
+                await layout.confirm_reference_script(
+                    self.ctx, chunk.data, reference_script_size
+                )
+            reference_script_cbor.add(chunk.data)
+
     # certificates
 
     async def _process_certificates(self, certificates_list: HashBuilderList) -> None:
@@ -686,7 +907,7 @@ class Signer:
                 messages.CardanoTxItemAck(), messages.CardanoTxCollateralInput
             )
             self._validate_collateral_input(collateral_input)
-            await layout.confirm_collateral_input(self.ctx, collateral_input)
+            await self._show_collateral_input(collateral_input)
             collateral_inputs_list.append(
                 (collateral_input.prev_hash, collateral_input.prev_index)
             )
@@ -697,6 +918,12 @@ class Signer:
         if len(collateral_input.prev_hash) != INPUT_PREV_HASH_SIZE:
             raise wire.ProcessError("Invalid collateral input")
 
+    async def _show_collateral_input(
+        self, collateral_input: messages.CardanoTxCollateralInput
+    ) -> None:
+        if self.msg.total_collateral is None:
+            await layout.confirm_collateral_input(self.ctx, collateral_input)
+
     # required signers
 
     async def _process_required_signers(
@@ -735,6 +962,123 @@ class Signer:
         else:
             raise INVALID_REQUIRED_SIGNER
 
+    # collateral return
+
+    async def _process_collateral_return(self) -> None:
+        output: messages.CardanoTxOutput = await self.ctx.call(
+            messages.CardanoTxItemAck(), messages.CardanoTxOutput
+        )
+        self._validate_collateral_return(output)
+        should_show_init = self._should_show_collateral_return_init(output)
+        should_show_tokens = self._should_show_collateral_return_tokens(output)
+        if should_show_init:
+            await self._show_collateral_return_init(output)
+
+        # Datums and reference scripts are forbidden, see _validate_collateral_return.
+        output_items_count = 2
+        if output.format == CardanoTxOutputSerializationFormat.ARRAY_LEGACY:
+            output_list: HashBuilderList = HashBuilderList(output_items_count)
+            with self.tx_dict.add(TX_BODY_KEY_COLLATERAL_RETURN, output_list):
+                await self._process_legacy_output(
+                    output_list, output, should_show_tokens
+                )
+        elif output.format == CardanoTxOutputSerializationFormat.MAP_BABBAGE:
+            output_dict: HashBuilderDict[int, Any] = HashBuilderDict(
+                output_items_count, wire.ProcessError("Invalid collateral return")
+            )
+            with self.tx_dict.add(TX_BODY_KEY_COLLATERAL_RETURN, output_dict):
+                await self._process_babbage_output(
+                    output_dict, output, should_show_tokens
+                )
+        else:
+            raise RuntimeError  # should be unreachable
+
+    def _validate_collateral_return(self, output: messages.CardanoTxOutput) -> None:
+        self._validate_output(output)
+
+        address_type = self._get_output_address_type(output)
+        if address_type not in addresses.ADDRESS_TYPES_PAYMENT_KEY:
+            raise wire.ProcessError("Invalid collateral return")
+
+        if (
+            output.datum_hash is not None
+            or output.inline_datum_size > 0
+            or output.reference_script_size > 0
+        ):
+            raise wire.ProcessError("Invalid collateral return")
+
+    async def _show_collateral_return_init(
+        self, output: messages.CardanoTxOutput
+    ) -> None:
+        # We don't display missing datum warning since datums are forbidden.
+
+        if output.asset_groups_count > 0:
+            await layout.warn_tx_output_contains_tokens(
+                self.ctx, is_collateral_return=True
+            )
+
+        if output.address_parameters is not None:
+            address = addresses.derive_human_readable(
+                self.keychain,
+                output.address_parameters,
+                self.msg.protocol_magic,
+                self.msg.network_id,
+            )
+            await self._show_output_credentials(
+                output.address_parameters,
+            )
+        else:
+            assert output.address is not None  # _validate_output
+            address = output.address
+
+        await layout.confirm_sending(
+            self.ctx,
+            output.amount,
+            address,
+            "collateral-return",
+            self.msg.network_id,
+        )
+
+    def _should_show_collateral_return_init(
+        self, output: messages.CardanoTxOutput
+    ) -> bool:
+        if self.msg.total_collateral is None:
+            return True
+
+        if self._is_simple_change_output(output):
+            return False
+
+        return True
+
+    def _should_show_collateral_return_tokens(
+        self, output: messages.CardanoTxOutput
+    ) -> bool:
+        if self._is_simple_change_output(output):
+            return False
+
+        return True
+
+    # reference inputs
+
+    async def _process_reference_inputs(
+        self, reference_inputs_list: HashBuilderList[tuple[bytes, int]]
+    ) -> None:
+        for _ in range(self.msg.reference_inputs_count):
+            reference_input: messages.CardanoTxReferenceInput = await self.ctx.call(
+                messages.CardanoTxItemAck(), messages.CardanoTxReferenceInput
+            )
+            self._validate_reference_input(reference_input)
+            await layout.confirm_reference_input(self.ctx, reference_input)
+            reference_inputs_list.append(
+                (reference_input.prev_hash, reference_input.prev_index)
+            )
+
+    def _validate_reference_input(
+        self, reference_input: messages.CardanoTxReferenceInput
+    ) -> None:
+        if len(reference_input.prev_hash) != INPUT_PREV_HASH_SIZE:
+            raise wire.ProcessError("Invalid reference input")
+
     # witness requests
 
     async def _process_witness_requests(self, tx_hash: bytes) -> CardanoTxResponseType:
@@ -767,6 +1111,10 @@ class Signer:
 
     # helpers
 
+    def _assert_tx_init_cond(self, condition: bool) -> None:
+        if not condition:
+            raise wire.ProcessError("Invalid tx signing request")
+
     def _is_network_id_verifiable(self) -> bool:
         """
         Checks whether there is at least one element that contains information about
@@ -823,6 +1171,22 @@ class Signer:
             self.msg.network_id,
         )
 
+    def _get_chunks_count(self, data_size: int) -> int:
+        assert data_size > 0
+        return (data_size - 1) // MAX_CHUNK_SIZE + 1
+
+    def _validate_chunk(
+        self,
+        chunk_data: bytes,
+        chunk_number: int,
+        chunks_count: int,
+        error: wire.ProcessError,
+    ) -> None:
+        if chunk_number < chunks_count - 1 and len(chunk_data) != MAX_CHUNK_SIZE:
+            raise error
+        if chunk_number == chunks_count - 1 and len(chunk_data) > MAX_CHUNK_SIZE:
+            raise error
+
     def _get_byron_witness(
         self, path: list[int], tx_hash: bytes
     ) -> messages.CardanoTxWitnessResponse:

python/src/trezorlib/cardano.py

@@ -26,6 +26,8 @@ from typing import (
     Optional,
     Sequence,
     Tuple,
+    Type,
+    TypeVar,
     Union,
 )
 
@@ -39,6 +41,8 @@ if TYPE_CHECKING:
 PROTOCOL_MAGICS = {"mainnet": 764824073, "testnet": 1097911063}
 NETWORK_IDS = {"mainnet": 1, "testnet": 0}
 
+MAX_CHUNK_SIZE = 1024
+
 REQUIRED_FIELDS_TRANSACTION = ("inputs", "outputs")
 REQUIRED_FIELDS_INPUT = ("prev_hash", "prev_index")
 REQUIRED_FIELDS_CERTIFICATE = ("type",)
@@ -67,9 +71,18 @@ INVALID_MINT_TOKEN_BUNDLE_ENTRY = "The mint token_bundle entry is invalid"
 InputWithPath = Tuple[messages.CardanoTxInput, List[int]]
 CollateralInputWithPath = Tuple[messages.CardanoTxCollateralInput, List[int]]
 AssetGroupWithTokens = Tuple[messages.CardanoAssetGroup, List[messages.CardanoToken]]
-OutputWithAssetGroups = Tuple[messages.CardanoTxOutput, List[AssetGroupWithTokens]]
+OutputWithData = Tuple[
+    messages.CardanoTxOutput,
+    List[AssetGroupWithTokens],
+    List[messages.CardanoTxInlineDatumChunk],
+    List[messages.CardanoTxReferenceScriptChunk],
+]
 OutputItem = Union[
-    messages.CardanoTxOutput, messages.CardanoAssetGroup, messages.CardanoToken
+    messages.CardanoTxOutput,
+    messages.CardanoAssetGroup,
+    messages.CardanoToken,
+    messages.CardanoTxInlineDatumChunk,
+    messages.CardanoTxReferenceScriptChunk,
 ]
 CertificateItem = Union[
     messages.CardanoTxCertificate,
@@ -89,6 +102,12 @@ Path = List[int]
 Witness = Tuple[Path, bytes]
 AuxiliaryDataSupplement = Dict[str, Union[int, bytes]]
 SignTxResponse = Dict[str, Union[bytes, List[Witness], AuxiliaryDataSupplement]]
+Chunk = TypeVar(
+    "Chunk",
+    bound=Union[
+        messages.CardanoTxInlineDatumChunk, messages.CardanoTxReferenceScriptChunk
+    ],
+)
 
 
 def parse_optional_bytes(value: Optional[str]) -> Optional[bytes]:
@@ -158,7 +177,7 @@ def parse_input(tx_input: dict) -> InputWithPath:
     )
 
 
-def parse_output(output: dict) -> OutputWithAssetGroups:
+def parse_output(output: dict) -> OutputWithData:
     contains_address = "address" in output
     contains_address_type = "addressType" in output
 
@@ -181,6 +200,20 @@ def parse_output(output: dict) -> OutputWithAssetGroups:
 
     datum_hash = parse_optional_bytes(output.get("datum_hash"))
 
+    serialization_format = messages.CardanoTxOutputSerializationFormat.ARRAY_LEGACY
+    if "format" in output:
+        serialization_format = output["format"]
+
+    inline_datum_size, inline_datum_chunks = _parse_chunkable_data(
+        parse_optional_bytes(output.get("inline_datum")),
+        messages.CardanoTxInlineDatumChunk,
+    )
+
+    reference_script_size, reference_script_chunks = _parse_chunkable_data(
+        parse_optional_bytes(output.get("reference_script")),
+        messages.CardanoTxReferenceScriptChunk,
+    )
+
     return (
         messages.CardanoTxOutput(
             address=address,
@@ -188,8 +221,13 @@ def parse_output(output: dict) -> OutputWithAssetGroups:
             amount=int(output["amount"]),
             asset_groups_count=len(token_bundle),
             datum_hash=datum_hash,
+            format=serialization_format,
+            inline_datum_size=inline_datum_size,
+            reference_script_size=reference_script_size,
         ),
         token_bundle,
+        inline_datum_chunks,
+        reference_script_chunks,
     )
 
 
@@ -287,6 +325,23 @@ def _parse_address_parameters(
     )
 
 
+def _parse_chunkable_data(
+    data: Optional[bytes], chunk_type: Type[Chunk]
+) -> Tuple[int, List[Chunk]]:
+    if data is None:
+        return 0, []
+    data_size = len(data)
+    data_chunks = [chunk_type(data=chunk) for chunk in _create_data_chunks(data)]
+    return data_size, data_chunks
+
+
+def _create_data_chunks(data: bytes) -> Iterator[bytes]:
+    processed_size = 0
+    while processed_size < len(data):
+        yield data[processed_size : (processed_size + MAX_CHUNK_SIZE)]
+        processed_size += MAX_CHUNK_SIZE
+
+
 def parse_native_script(native_script: dict) -> messages.CardanoNativeScript:
     if "type" not in native_script:
         raise ValueError("Script is missing some fields")
@@ -565,6 +620,16 @@ def parse_required_signer(required_signer: dict) -> messages.CardanoTxRequiredSi
     )
 
 
+def parse_reference_input(reference_input: dict) -> messages.CardanoTxReferenceInput:
+    if not all(k in reference_input for k in REQUIRED_FIELDS_INPUT):
+        raise ValueError("The reference input is missing some fields")
+
+    return messages.CardanoTxReferenceInput(
+        prev_hash=bytes.fromhex(reference_input["prev_hash"]),
+        prev_index=reference_input["prev_index"],
+    )
+
+
 def parse_additional_witness_request(
     additional_witness_request: dict,
 ) -> Path:
@@ -630,20 +695,32 @@ def _get_witness_requests(
     return [messages.CardanoTxWitnessRequest(path=path) for path in sorted_paths]
 
 
-def _get_input_items(inputs: List[InputWithPath]) -> Iterator[messages.CardanoTxInput]:
+def _get_inputs_items(inputs: List[InputWithPath]) -> Iterator[messages.CardanoTxInput]:
     for input, _ in inputs:
         yield input
 
 
-def _get_output_items(outputs: List[OutputWithAssetGroups]) -> Iterator[OutputItem]:
-    for output, asset_groups in outputs:
-        yield output
-        for asset_group, tokens in asset_groups:
-            yield asset_group
-            yield from tokens
+def _get_outputs_items(outputs: List[OutputWithData]) -> Iterator[OutputItem]:
+    for output_with_data in outputs:
+        yield from _get_output_items(output_with_data)
+
+
+def _get_output_items(output_with_data: OutputWithData) -> Iterator[OutputItem]:
+    (
+        output,
+        asset_groups,
+        inline_datum_chunks,
+        reference_script_chunks,
+    ) = output_with_data
+    yield output
+    for asset_group, tokens in asset_groups:
+        yield asset_group
+        yield from tokens
+    yield from inline_datum_chunks
+    yield from reference_script_chunks
 
 
-def _get_certificate_items(
+def _get_certificates_items(
     certificates: Sequence[CertificateWithPoolOwnersAndRelays],
 ) -> Iterator[CertificateItem]:
     for certificate, pool_owners_and_relays in certificates:
@@ -663,7 +740,7 @@ def _get_mint_items(mint: Sequence[AssetGroupWithTokens]) -> Iterator[MintItem]:
         yield from tokens
 
 
-def _get_collateral_input_items(
+def _get_collateral_inputs_items(
     collateral_inputs: Sequence[CollateralInputWithPath],
 ) -> Iterator[messages.CardanoTxCollateralInput]:
     for collateral_input, _ in collateral_inputs:
@@ -726,7 +803,7 @@ def sign_tx(
     client: "TrezorClient",
     signing_mode: messages.CardanoTxSigningMode,
     inputs: List[InputWithPath],
-    outputs: List[OutputWithAssetGroups],
+    outputs: List[OutputWithData],
     fee: int,
     ttl: Optional[int],
     validity_interval_start: Optional[int],
@@ -739,6 +816,9 @@ def sign_tx(
     script_data_hash: Optional[bytes] = None,
     collateral_inputs: Sequence[CollateralInputWithPath] = (),
     required_signers: Sequence[messages.CardanoTxRequiredSigner] = (),
+    collateral_return: Optional[OutputWithData] = None,
+    total_collateral: Optional[int] = None,
+    reference_inputs: Sequence[messages.CardanoTxReferenceInput] = (),
     additional_witness_requests: Sequence[Path] = (),
     derivation_type: messages.CardanoDerivationType = messages.CardanoDerivationType.ICARUS,
     include_network_id: bool = False,
@@ -772,6 +852,9 @@ def sign_tx(
             script_data_hash=script_data_hash,
             collateral_inputs_count=len(collateral_inputs),
             required_signers_count=len(required_signers),
+            has_collateral_return=collateral_return is not None,
+            total_collateral=total_collateral,
+            reference_inputs_count=len(reference_inputs),
             witness_requests_count=len(witness_requests),
             derivation_type=derivation_type,
             include_network_id=include_network_id,
@@ -781,9 +864,9 @@ def sign_tx(
         raise UNEXPECTED_RESPONSE_ERROR
 
     for tx_item in chain(
-        _get_input_items(inputs),
-        _get_output_items(outputs),
-        _get_certificate_items(certificates),
+        _get_inputs_items(inputs),
+        _get_outputs_items(outputs),
+        _get_certificates_items(certificates),
         withdrawals,
     ):
         response = client.call(tx_item)
@@ -812,13 +895,24 @@ def sign_tx(
 
     for tx_item in chain(
         _get_mint_items(mint),
-        _get_collateral_input_items(collateral_inputs),
+        _get_collateral_inputs_items(collateral_inputs),
         required_signers,
     ):
         response = client.call(tx_item)
         if not isinstance(response, messages.CardanoTxItemAck):
             raise UNEXPECTED_RESPONSE_ERROR
 
+    if collateral_return is not None:
+        for tx_item in _get_output_items(collateral_return):
+            response = client.call(tx_item)
+            if not isinstance(response, messages.CardanoTxItemAck):
+                raise UNEXPECTED_RESPONSE_ERROR
+
+    for reference_input in reference_inputs:
+        response = client.call(reference_input)
+        if not isinstance(response, messages.CardanoTxItemAck):
+            raise UNEXPECTED_RESPONSE_ERROR
+
     sign_tx_response["witnesses"] = []
     for witness_request in witness_requests:
         response = client.call(witness_request)

python/src/trezorlib/cli/cardano.py

@@ -98,6 +98,16 @@ def sign_tx(
         cardano.parse_required_signer(required_signer)
         for required_signer in transaction.get("required_signers", ())
     ]
+    collateral_return = (
+        cardano.parse_output(transaction["collateral_return"])
+        if transaction.get("collateral_return")
+        else None
+    )
+    total_collateral = transaction.get("total_collateral")
+    reference_inputs = [
+        cardano.parse_reference_input(reference_input)
+        for reference_input in transaction.get("reference_inputs", ())
+    ]
     additional_witness_requests = [
         cardano.parse_additional_witness_request(p)
         for p in transaction["additional_witness_requests"]
@@ -121,6 +131,9 @@ def sign_tx(
         script_data_hash,
         collateral_inputs,
         required_signers,
+        collateral_return,
+        total_collateral,
+        reference_inputs,
         additional_witness_requests,
         derivation_type=derivation_type,
         include_network_id=include_network_id,

tests/device_tests/cardano/test_sign_tx.py

@@ -53,6 +53,14 @@ def test_cardano_sign_tx(client: Client, parameters, result):
     required_signers = [
         cardano.parse_required_signer(s) for s in parameters["required_signers"]
     ]
+    collateral_return = (
+        cardano.parse_output(parameters["collateral_return"])
+        if parameters["collateral_return"] is not None
+        else None
+    )
+    reference_inputs = [
+        cardano.parse_reference_input(i) for i in parameters["reference_inputs"]
+    ]
     additional_witness_requests = [
         cardano.parse_additional_witness_request(p)
         for p in parameters["additional_witness_requests"]
@@ -72,8 +80,8 @@ def test_cardano_sign_tx(client: Client, parameters, result):
             inputs=inputs,
             outputs=outputs,
             fee=parameters["fee"],
-            ttl=parameters.get("ttl"),
-            validity_interval_start=parameters.get("validity_interval_start"),
+            ttl=parameters["ttl"],
+            validity_interval_start=parameters["validity_interval_start"],
             certificates=certificates,
             withdrawals=withdrawals,
             protocol_magic=parameters["protocol_magic"],
@@ -83,6 +91,9 @@ def test_cardano_sign_tx(client: Client, parameters, result):
             script_data_hash=script_data_hash,
             collateral_inputs=collateral_inputs,
             required_signers=required_signers,
+            collateral_return=collateral_return,
+            total_collateral=parameters["total_collateral"],
+            reference_inputs=reference_inputs,
             additional_witness_requests=additional_witness_requests,
             include_network_id=parameters["include_network_id"],
         )
@@ -112,6 +123,14 @@ def test_cardano_sign_tx_failed(client: Client, parameters, result):
     required_signers = [
         cardano.parse_required_signer(s) for s in parameters["required_signers"]
     ]
+    collateral_return = (
+        cardano.parse_output(parameters["collateral_return"])
+        if parameters["collateral_return"] is not None
+        else None
+    )
+    reference_inputs = [
+        cardano.parse_reference_input(i) for i in parameters["reference_inputs"]
+    ]
     additional_witness_requests = [
         cardano.parse_additional_witness_request(p)
         for p in parameters["additional_witness_requests"]
@@ -132,8 +151,8 @@ def test_cardano_sign_tx_failed(client: Client, parameters, result):
                 inputs=inputs,
                 outputs=outputs,
                 fee=parameters["fee"],
-                ttl=parameters.get("ttl"),
-                validity_interval_start=parameters.get("validity_interval_start"),
+                ttl=parameters["ttl"],
+                validity_interval_start=parameters["validity_interval_start"],
                 certificates=certificates,
                 withdrawals=withdrawals,
                 protocol_magic=parameters["protocol_magic"],
@@ -143,6 +162,9 @@ def test_cardano_sign_tx_failed(client: Client, parameters, result):
                 script_data_hash=script_data_hash,
                 collateral_inputs=collateral_inputs,
                 required_signers=required_signers,
+                collateral_return=collateral_return,
+                total_collateral=parameters["total_collateral"],
+                reference_inputs=reference_inputs,
                 additional_witness_requests=additional_witness_requests,
                 include_network_id=parameters["include_network_id"],
             )