I’d like to ask a few question related to MW transactions that I saw on litecoin network.
This is an example of decoded PegIn transaction:
{...
'locktime': 2555172,
'size': 2203,
'txid': 'b89c36c90b8742caa1cc5bd3f686b144dea1513a1c78f181225dd9e7eb6cd77f',
'version': 2,
'vin': [{'ismweb': False,
'scriptSig': {'asm': '', 'hex': ''},
'sequence': 4294967294,
'txid': '1f8264910c9882de7955a0f5b386ee142701b3711719a54a37afa72a29d51366',
'txinwitness': ['30440220777fbf4d36a5e39c0ba6a6e70f67cf6bec2c25002b3fd0fbf541c8e7fdecdd6002200211ef28894b5cb31c735dedb0dc33bfc18ce355f335b9677493388a8b0cb6b801',
'0266c10f489496f40150d26510978cb88402cfd9180b8c89c28e12bbbabde6e893'],
'vout': 0}],
'vkern': [{'fee': Decimal('0.00003900'),
'kernel_id': '2baee39243b58230260dee3800e0bfa0cc6af17695ecf2ae0654741738fccc2b',
'pegin': Decimal('82.99998370'),
'pegout': []}],
'vout': [{'ismweb': False,
'n': 0,
'scriptPubKey': {'asm': '9 '
'2baee39243b58230260dee3800e0bfa0cc6af17695ecf2ae0654741738fccc2b',
'hex': '59202baee39243b58230260dee3800e0bfa0cc6af17695ecf2ae0654741738fccc2b',
'type': 'witness_mweb_pegin'},
'value': Decimal('82.99998370')},
{'ismweb': True,
'output_id': '0485f4098d229eb9d1399089b8a239af3df987bc9fa537795aa16e9fc9711754'},
{'ismweb': True,
'output_id': 'ee416b380658f19be5addf8b4178d9e1e992dfb89bfd4f0d0a97d51f58515f62'}],
'vsize': 163,
'weight': 649}
- I didn’t find specification of the fields. What does ‘ismweb’ and ‘output_id’ fields mean?
1a) If ‘ismweb’ == True, does it imply that no other field except for ‘output_id’ field is present in that output?
-
I noticed that ‘vout’ of PegIn transactions has similar pattern - 1st entry is a transfer of the specified amount to MWEB. That 1st entry is usually followed by two entries as in the above example. What they are? A change? Why two?
-
The PegIn transactions look like as above only until they are in mempool. Once they get to block, the output of ‘getrawtransaction’ differs significantly, as follows. Why? Why additional vout entries disappeared?
{'error': 0,
'id': 1,
'result': {'blockhash': '20feda03d4018f8f1f6c116ab956c5f0dc263d04b7d69edab0a45c62268ff99b',
'blocktime': 1696263591,
'confirmations': 1079,
'hash': '037a754d82cadfa5c4776d53da216a406f5727c8801dc1c81be0960d1208f484',
'hex': '020000000001016613d5292aa7af374aa5191771b3012714ee86b3f5a05579de82980c9164821f0000000000feffffff01a2ecb7ee010000002259202baee39243b58230260dee3800e0bfa0cc6af17695ecf2ae0654741738fccc2b024730440220777fbf4d36a5e39c0ba6a6e70f67cf6bec2c25002b3fd0fbf541c8e7fdecdd6002200211ef28894b5cb31c735dedb0dc33bfc18ce355f335b9677493388a8b0cb6b801210266c10f489496f40150d26510978cb88402cfd9180b8c89c28e12bbbabde6e89324fd2600',
'locktime': 2555172,
'size': 203,
'time': 1696263591,
'txid': 'b89c36c90b8742caa1cc5bd3f686b144dea1513a1c78f181225dd9e7eb6cd77f',
'version': 2,
'vin': [{'ismweb': 0,
'scriptSig': {'asm': '', 'hex': ''},
'sequence': 4294967294,
'txid': '1f8264910c9882de7955a0f5b386ee142701b3711719a54a37afa72a29d51366',
'txinwitness': ['30440220777fbf4d36a5e39c0ba6a6e70f67cf6bec2c25002b3fd0fbf541c8e7fdecdd6002200211ef28894b5cb31c735dedb0dc33bfc18ce355f335b9677493388a8b0cb6b801',
'0266c10f489496f40150d26510978cb88402cfd9180b8c89c28e12bbbabde6e893'],
'vout': 0}],
'vout': [{'ismweb': 0,
'n': 0,
'scriptPubKey': {'asm': '9 '
'2baee39243b58230260dee3800e0bfa0cc6af17695ecf2ae0654741738fccc2b',
'hex': '59202baee39243b58230260dee3800e0bfa0cc6af17695ecf2ae0654741738fccc2b',
'type': 'witness_mweb_pegin'},
'value': 82.9999837}],
'vsize': 122,
'weight': 485}}
- Why PegOut transactions (example below) exist only in mempool? Once the block gets mined, the getrawtransaction returns “No such mempool or blockchain transaction.”
{...
'locktime': 2555139,
'size': 1727,
'txid': '63fe443214654b7afa393f8ed8ad7f241cf2e0a3ab2004e735f980d08a6c6cc0',
'version': 2,
'vin': [{'ismweb': True,
'output_id': 'b0e801c08449b2d2c556f03d453abe33e8d3cdee104ab93856ed781d1fc93324'},
{'ismweb': True,
'output_id': 'b2223dce5a8b18db5dcf2deafc60c4a08e0dba1e574d2437d7b719ae545ecb7d'},
{'ismweb': True,
'output_id': 'b75128be245d152654067bb7e54f79adf5e290f6754b7d7ec46697e97096ff7f'}],
'vkern': [{'fee': Decimal('0.00002510'),
'kernel_id': 'c06c6c8ad080f935e70420aba3e0f21c247fadd88e3f39fa7a4b65143244fe63',
'pegin': Decimal('0E-8'),
'pegout': [{'scriptPubKey': {'addresses': ['ltc1qnkfn84w74xntd438geszel9gn74p03z99349tw'],
'asm': '0 '
'9d9333d5dea9a6b6d62746602cfca89faa17c445',
'hex': '00149d9333d5dea9a6b6d62746602cfca89faa17c445',
'reqSigs': 1,
'type': 'witness_v0_keyhash'},
'value': Decimal('7.96000000')}]}],
'vout': [{'ismweb': True,
'output_id': '5f70a00fd52505b93d5c08e1f7ba3f57d17a6c23ca68ebc5358b0957f90f24fd'}],
'vsize': 31,
'weight': 124}
- Is the following transaction an example of “native” MW transaction (I mean a transaction merely within MWEB)? Again, why does it exist only until it gets mined? Once it gets mined, the getrawtransaction returns “No such mempool or blockchain transaction.”
{...
'locktime': 2555177,
'size': 2399,
'txid': '3fd9b503ee07ff02a5c2ae3278c78c0c1808a456c923b32be27eebb1160c78a5',
'version': 2,
'vin': [{'ismweb': True,
'output_id': '2e866708759e156bf664f930ad3d17e10889cc590879002763f529e704c40db1'},
{'ismweb': True,
'output_id': 'ee416b380658f19be5addf8b4178d9e1e992dfb89bfd4f0d0a97d51f58515f62'}],
'vkern': [{'fee': Decimal('0.00003900'),
'kernel_id': 'a5780c16b1eb7ee22bb323c956a408180c8cc77832aec2a502ff07ee03b5d93f',
'pegin': Decimal('0E-8'),
'pegout': []}],
'vout': [{'ismweb': True,
'output_id': '4b6b7ab2eba72be832e41086fc1b4237d3fcbb740e1c9c09a10f3020c7f700fa'},
{'ismweb': True,
'output_id': '5e46d4b08574fcfbdf30dc93eafbb1635f981fa1c5a7e9ac5e101e6f57508c60'}],
'vsize': 0,
'weight': 0}