ELIP 202: Implementation of optional sidechain peg-in subsidy and minimum peg-in amount #1499
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In CreatePeginWitnessInner, the MerkleBlock is always serialized without witness: PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS In DecomposePeginWitness before this change, the MerkleBlock was deserialized with witness: PROTOCOL_VERSION This was only noticed as an issue in the pegin subsidy implementation, in a failure in the feature_dynafed functional test. In the test_transition_mempool_eject test case, the Merkle block proof is coming from the same chain where we are creating a pegin. See the comment: "hack: since we're not validating peg-ins in parent chain, just make both the funding and claim tx on same chain (printing money)" I haven't investigated enough to explain why this causes a deserialization failure in this specific case, but presumably this change is correct since we're always serializing without witness. Before this DecomposePeginWitness was only used in src/psbt.cpp
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Implementation for ELIP 202