diff --git a/trezorlib/tests/unit_tests/test_stellar.py b/trezorlib/tests/unit_tests/test_stellar.py
new file mode 100644
index 000000000..054b1b317
--- /dev/null
+++ b/trezorlib/tests/unit_tests/test_stellar.py
@@ -0,0 +1,313 @@
+# This file is part of the Trezor project.
+#
+# Copyright (C) 2012-2018 SatoshiLabs and contributors
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3
+# as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the License along with this library.
+# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
+
+import base64
+from trezorlib import stellar, messages as proto
+
+
+def test_stellar_parse_transaction_bytes_simple():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAAAO5/eyAAAAAA='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+
+    assert tx.source_account == b'GAK5MSF74TJW6GLM7NLTL76YZJKM2S4CGP3UH4REJHPHZ4YBZW2GSBPW'
+    assert tx.fee == 100
+    assert tx.sequence_number == 4294967296
+    assert tx.timebounds_start is None
+    assert tx.timebounds_end is None
+    assert tx.memo_type == stellar.MEMO_TYPE_NONE
+    assert tx.memo_text is None
+    assert tx.memo_id is None
+    assert tx.memo_hash is None
+    assert tx.num_operations == len(operations)
+
+def test_stellar_parse_transaction_bytes_memo_text():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAEAAAAMZXhhbXBsZSBtZW1vAAAAAQAAAAAAAAAAAAAAAF1VZCRmsYW4QxUuniGRUdvFiSAn7EAQGlF77VygMMLgAAAAADuf3sgAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+
+    assert tx.source_account == b'GAK5MSF74TJW6GLM7NLTL76YZJKM2S4CGP3UH4REJHPHZ4YBZW2GSBPW'
+    assert tx.fee == 100
+    assert tx.sequence_number == 4294967296
+    assert tx.timebounds_start is None
+    assert tx.timebounds_end is None
+    assert tx.memo_type == stellar.MEMO_TYPE_TEXT
+    assert tx.memo_text == b'example memo'
+    assert tx.memo_id is None
+    assert tx.memo_hash is None
+    assert tx.num_operations == len(operations)
+
+def test_stellar_parse_transaction_bytes_memo_id():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAIAAAAAB1vNFQAAAAEAAAAAAAAAAAAAAABdVWQkZrGFuEMVLp4hkVHbxYkgJ+xAEBpRe+1coDDC4AAAAAA7n97IAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+
+    assert tx.source_account == b'GAK5MSF74TJW6GLM7NLTL76YZJKM2S4CGP3UH4REJHPHZ4YBZW2GSBPW'
+    assert tx.fee == 100
+    assert tx.sequence_number == 4294967296
+    assert tx.timebounds_start is None
+    assert tx.timebounds_end is None
+    assert tx.memo_type == stellar.MEMO_TYPE_ID
+    assert tx.memo_text is None
+    assert tx.memo_id == 123456789
+    assert tx.memo_hash is None
+    assert tx.num_operations == len(operations)
+
+def test_stellar_parse_transaction_bytes_memo_hash():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAMjLtb5+r8U47tVOSsYz+PQ/ryU0gzGMnw4odB11uoRjAAAAAEAAAAAAAAAAAAAAABdVWQkZrGFuEMVLp4hkVHbxYkgJ+xAEBpRe+1coDDC4AAAAAA7n97IAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+
+    assert tx.source_account == b'GAK5MSF74TJW6GLM7NLTL76YZJKM2S4CGP3UH4REJHPHZ4YBZW2GSBPW'
+    assert tx.fee == 100
+    assert tx.sequence_number == 4294967296
+    assert tx.timebounds_start is None
+    assert tx.timebounds_end is None
+    assert tx.memo_type == stellar.MEMO_TYPE_HASH
+    assert tx.memo_text is None
+    assert tx.memo_id is None
+    # base-64 encoding of the raw bytes of sha256('stellar')
+    assert base64.b64encode(tx.memo_hash) == b'Iy7W+fq/FOO7VTkrGM/j0P68lNIMxjJ8OKHQddbqEYw='
+    assert tx.num_operations == len(operations)
+
+def test_stellar_parse_transaction_bytes_memo_return():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAQjLtb5+r8U47tVOSsYz+PQ/ryU0gzGMnw4odB11uoRjAAAAAEAAAAAAAAAAAAAAABdVWQkZrGFuEMVLp4hkVHbxYkgJ+xAEBpRe+1coDDC4AAAAAA7n97IAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+
+    assert tx.source_account == b'GAK5MSF74TJW6GLM7NLTL76YZJKM2S4CGP3UH4REJHPHZ4YBZW2GSBPW'
+    assert tx.fee == 100
+    assert tx.sequence_number == 4294967296
+    assert tx.timebounds_start is None
+    assert tx.timebounds_end is None
+    assert tx.memo_type == stellar.MEMO_TYPE_RETURN
+    assert tx.memo_text is None
+    assert tx.memo_id is None
+    # base-64 encoding of the raw bytes of sha256('stellar')
+    assert base64.b64encode(tx.memo_hash) == b'Iy7W+fq/FOO7VTkrGM/j0P68lNIMxjJ8OKHQddbqEYw='
+    assert tx.num_operations == len(operations)
+
+def test_stellar_parse_operation_bytes_create_account_simple():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAAAO5/eyAAAAAA='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarCreateAccountOp)
+    assert op.source_account is None
+    assert op.new_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+    assert op.starting_balance == 1000333000
+
+def test_stellar_parse_operation_bytes_payment_native():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAAAAAAAAB3PFpgAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarPaymentOp)
+    assert op.source_account is None
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+    assert op.asset.type == stellar.ASSET_TYPE_NATIVE
+    assert op.amount == 500111000
+
+def test_stellar_parse_operation_bytes_payment_custom4():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAABVEVTVAAAAAAphJYCwg5YNl8SPBLYehykVQ0QzSGwrg4Y1E4+Vv1qFQAAAAAdzxaYAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert op.source_account is None
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+    assert op.asset.type == stellar.ASSET_TYPE_ALPHA4
+    assert op.asset.code == b'TEST'
+    assert op.asset.issuer == b'GAUYJFQCYIHFQNS7CI6BFWD2DSSFKDIQZUQ3BLQODDKE4PSW7VVBKENC'
+    assert op.amount == 500111000
+
+def test_stellar_parse_operation_bytes_payment_custom7():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAEAAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAACU0VWRU5YWAAAAAAAAAAAACmElgLCDlg2XxI8Eth6HKRVDRDNIbCuDhjUTj5W/WoVAAAAAB3PFpgAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarPaymentOp)
+    assert op.source_account is None
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+    assert op.asset.type == stellar.ASSET_TYPE_ALPHA12
+    # asset codes are either 4 or 12 characters, so this will be null-padded at the end
+    assert op.asset.code == b'SEVENXX\x00\x00\x00\x00\x00'
+    assert op.asset.issuer == b'GAUYJFQCYIHFQNS7CI6BFWD2DSSFKDIQZUQ3BLQODDKE4PSW7VVBKENC'
+    assert op.amount == 500111000
+
+def test_stellar_parse_operation_bytes_path_payment_none():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAIAAAAAAAAAAHfOKn8AAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAABSlBZAAAAAADE+xa3Eb3cy85WSdqgwnUtC6UDwrC41YDANuCqe8vGxgAAAAAL68IBAAAAAAAAAAA='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarPathPaymentOp)
+    assert op.source_account is None
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+
+    assert op.send_asset.type == stellar.ASSET_TYPE_NATIVE
+    assert op.send_max == 2009999999
+
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+    assert op.destination_asset.type == stellar.ASSET_TYPE_ALPHA4
+    # asset codes are either 4 or 12 characters, so this will be null-padded at the end
+    assert op.destination_asset.code == b'JPY\x00'
+    assert op.destination_asset.issuer == b'GDCPWFVXCG65ZS6OKZE5VIGCOUWQXJIDYKYLRVMAYA3OBKT3ZPDMNTIJ'
+
+    assert len(op.paths) == 0
+
+def test_stellar_parse_operation_bytes_path_payment_one():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAIAAAAAAAAAAHfOKn8AAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAABSlBZAAAAAADE+xa3Eb3cy85WSdqgwnUtC6UDwrC41YDANuCqe8vGxgAAAAAL68IBAAAAAQAAAAFQVEgxAAAAAMz/d9fJ3rFifblw3jT7sRZv/Ja+fqLfob//aLZQRQibAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarPathPaymentOp)
+    assert op.source_account is None
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+
+    assert op.send_asset.type == stellar.ASSET_TYPE_NATIVE
+    assert op.send_max == 2009999999
+
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+    assert op.destination_asset.type == stellar.ASSET_TYPE_ALPHA4
+    # asset codes are either 4 or 12 characters, so this will be null-padded at the end
+    assert op.destination_asset.code == b'JPY\x00'
+    assert op.destination_asset.issuer == b'GDCPWFVXCG65ZS6OKZE5VIGCOUWQXJIDYKYLRVMAYA3OBKT3ZPDMNTIJ'
+    assert op.destination_amount == 200000001
+
+    assert len(op.paths) == 1
+    assert op.paths[0].type == stellar.ASSET_TYPE_ALPHA4
+    assert op.paths[0].code == b'PTH1'
+    assert op.paths[0].issuer == b'GDGP656XZHPLCYT5XFYN4NH3WELG77EWXZ7KFX5BX77WRNSQIUEJXAJK'
+
+def test_stellar_parse_operation_bytes_manage_offer_new():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAMAAAAAAAAAAVVTRAAAAAAABkAD8fq0d+bofA1LCatUL0dCTJexnyYYd4Y1ghnNUXMAAAAAdzWUAAAKSzYAD0JAAAAAAAAAAAAAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarManageOfferOp)
+    assert op.source_account is None
+
+    assert op.selling_asset.type == stellar.ASSET_TYPE_NATIVE
+
+    assert op.buying_asset.type == stellar.ASSET_TYPE_ALPHA4
+    # asset codes are either 4 or 12 characters, so this will be null-padded at the end
+    assert op.buying_asset.code == b'USD\x00'
+    assert op.buying_asset.issuer == b'GADEAA7R7K2HPZXIPQGUWCNLKQXUOQSMS6YZ6JQYO6DDLAQZZVIXG74A'
+
+    assert op.amount == 2000000000
+    assert op.price_n == 674614
+    assert op.price_d == 1000000
+    assert op.offer_id == 0 # indicates a new offer
+
+def test_stellar_parse_operation_bytes_passive_offer_new():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAQAAAAAAAAAAVVTRAAAAAAABkAD8fq0d+bofA1LCatUL0dCTJexnyYYd4Y1ghnNUXMAAAAAdzWUAAAKSzYAD0JAAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarCreatePassiveOfferOp)
+    assert op.source_account is None
+
+    assert op.selling_asset.type == stellar.ASSET_TYPE_NATIVE
+
+    assert op.buying_asset.type == stellar.ASSET_TYPE_ALPHA4
+    # asset codes are either 4 or 12 characters, so this will be null-padded at the end
+    assert op.buying_asset.code == b'USD\x00'
+    assert op.buying_asset.issuer == b'GADEAA7R7K2HPZXIPQGUWCNLKQXUOQSMS6YZ6JQYO6DDLAQZZVIXG74A'
+
+    assert op.amount == 2000000000
+    assert op.price_n == 674614
+    assert op.price_d == 1000000
+
+def test_stellar_parse_operation_bytes_set_options_inflation():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAUAAAABAAAAAAt5i66vbwH70/2M4Oj0rQW81SNLAjfOsMV2bavzocXhAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarSetOptionsOp)
+    assert op.source_account is None
+
+    assert op.inflation_destination_account == b'GAFXTC5OV5XQD66T7WGOB2HUVUC3ZVJDJMBDPTVQYV3G3K7TUHC6CLBR'
+
+def test_stellar_parse_operation_bytes_change_trust_add():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAYAAAABVVNEAAAAAACkn7CoQZEWAlyO6z6VBUAddrDDR078TtLt/nP/hZJ9KQAAAAJUC+QAAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarChangeTrustOp)
+    assert op.source_account is None
+
+    assert op.asset.type == stellar.ASSET_TYPE_ALPHA4
+    assert op.asset.code == b'USD\x00'
+    assert op.asset.issuer == b'GCSJ7MFIIGIRMAS4R3VT5FIFIAOXNMGDI5HPYTWS5X7HH74FSJ6STSGF'
+
+    assert op.limit == 10000000000
+
+def test_stellar_parse_operation_bytes_allow_trust_allow():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAcAAAAAZ0Me3OnxI2tuaC8qt95THF1fuB42qARTnP2ookJapQUAAAABSlBZAAAAAAEAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarAllowTrustOp)
+    assert op.source_account is None
+
+    assert op.asset_type == stellar.ASSET_TYPE_ALPHA4
+    assert op.asset_code == b'JPY\x00'
+
+    assert op.trusted_account == b'GBTUGHW45HYSG23ONAXSVN66KMOF2X5YDY3KQBCTTT62RISCLKSQLYF4'
+
+def test_stellar_parse_operation_bytes_account_merge_simple():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAgAAAAAXVVkJGaxhbhDFS6eIZFR28WJICfsQBAaUXvtXKAwwuAAAAAA'
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarAccountMergeOp)
+    assert op.source_account is None
+
+    assert op.destination_account == b'GBOVKZBEM2YYLOCDCUXJ4IMRKHN4LCJAE7WEAEA2KF562XFAGDBOB64V'
+
+def test_stellar_parse_operation_bytes_manage_data_set_simple():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAoAAAAJdGVzdCBkYXRhAAAAAAAAAQAAAARhc2RmAAAAAA=='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarManageDataOp)
+    assert op.source_account is None
+
+    assert op.key == b'test data'
+    assert op.value == b'asdf'
+
+def test_stellar_parse_operation_bytes_bump_sequence_simple():
+    b64 = b'AAAAABXWSL/k028ZbPtXNf/YylTNS4Iz90PyJEnefPMBzbRpAAAAZAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAsAAAAASZYC0gAAAAA='
+
+    tx, operations = stellar.parse_transaction_bytes(base64.b64decode(b64))
+    op = operations[0]
+
+    assert isinstance(op, proto.StellarBumpSequenceOp)
+    assert op.source_account is None
+
+    assert op.bump_to == 1234567890
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