PrevoutTxField carries the serialized raw bitcoin tx that produced the
previous output spent by an input. Used by OP_INSPECTINPUTSCRIPTPUBKEY in
the SubmitOnchainTx flow, where there is no Ark tx but a plain Bitcoin
funding tx whose pkScript must be resolvable.
Key: [0xde] || "prevouttx". Value: serialized wire.MsgTx (NOT a PSBT).
PrevoutTxField carries the serialized raw bitcoin tx that produced the previous output spent by an input. Used by OP_INSPECTINPUTSCRIPTPUBKEY in the SubmitOnchainTx flow, where there is no Ark tx but a plain Bitcoin funding tx whose pkScript must be resolvable.
Key: [0xde] || "prevouttx". Value: serialized wire.MsgTx (NOT a PSBT).