Following the migration of parsePartialTx to deserializeTx, cardanoTxInExactEra has no external callers. Remove it along with the now-redundant Data.Data import in SealedTx.hs.
Replace cardanoTxInExactEra (cardano-api path) with deserializeTx (ledger-native) in the redeemer-bearing partial tx parser. Pattern-matches on RecentEra era so the era singleton witnesses the target ledger type. One fewer caller of cardano-api's 'deserialiseFromCBOR / InAnyCardanoEra Cardano.Tx' path. 'fromCardanoApiTx' → direct use of 'Read.Tx era' unwrapped into 'Write.Tx era'.
Replace the cardano-api path (SealedTx → unsealShelleyTx → TxInMode → toConsensusGenTx → GenTx) with a direct ledger-native path (SealedTx → unsafeReadTx :: EraValue Read.Tx → consensusGenTxFromTxRecent → GenTx). The stored 'EraValue Read.Tx' already knows its era, so the separate 'readCurrentEra' query is no longer needed, and 'TxInMode' / 'toConsensusGenTx' / 'unsealShelleyTx' / 'UnsealException' all become unused. Deletes: - Cardano.Wallet.Primitive.Ledger.Shelley.unsealShelleyTx - Cardano.Wallet.Primitive.Ledger.Shelley.UnsealException - cardano-api 'TxInMode' import in primitive - cardano-api 'toConsensusGenTx' import in network-layer Adds 'unsafeReadTx' to the re-export of 'SealedTx' in Cardano.Wallet.Primitive.Types.Tx. Step 1 of SealedTx decommission plan. One fewer caller of 'cardanoTxIdeallyNoLaterThan'; the submission path no longer touches cardano-api.
Replace mkUnsignedTx + mkByronWitness/mkShelleyWitness with mkLedgerTx + mkByronWitnessLedger/mkShelleyWitnessLedger in the duplicated test module. All 8 golden hex string tests pass — ledger-native construction produces byte-identical CBOR to the cardano-api construction.
Alternative to Transaction.hs that builds transactions using mkLedgerTx (ledger lenses) instead of Cardano.Api.TxBodyContent. Implements mkTransactionLedger and constructUnsignedTxLedger with key-witnessed withdrawals and certificates. Minting, script witnesses, and reference scripts are TODO. Remaining cardano-api dependencies (with TODOs): - signTransaction takes Cardano.NetworkId - sealWriteTx roundtrips through cardano-api - certificateFromDelegationAction returns Cardano.Certificate
Replace InAnyCardanoEra Cardano.Tx with EraValue Read.Tx as the decoded transaction field. The CBOR bytes remain the canonical representation. Temporary cardano-api reconstruction functions kept for callers that haven't migrated yet (cardanoTxIdeallyNoLaterThan, getSealedTxBody, getSealedTxWitnesses). These deserialize from bytes on demand. fromSealedTx in Sealed.hs becomes trivial: just reads the field.