## Multi-net slot↔ms (drops mainnet-only gate)
Replaces mainnet_slot_to_posix_ms with slot_to_posix_ms(network, slot)
that handles all three Cardano networks. Vote + advance MCP tools no
longer hard-error on preprod/preview.
Per-network Shelley HF constants (slot, posix_ms_at_slot):
- mainnet: 4_492_800 1_596_059_091_000 (2020-07-29 21:44:51 UTC)
- preprod: 86_400 1_655_769_600_000 (2022-06-21 00:00 UTC)
- preview: 0 1_666_656_000_000 (2022-10-25 00:00 UTC)
Pre-Shelley (Byron) slots still rejected — they had different lengths
and DAO operations don't need them. Routed via cfg.network at every
call site so the MCP tool's behavior follows the active DAO's chain.
## Live-decode StakeDatum regression tests
Anchors the StakeDatum type port to two real on-chain UTxOs at the
Sulkta stakes_addr:
- decodes_sulkta_live_kayos_stake — 50 Terrapin, owner pkh 84d0..f2f3,
utxo d5b73a9d...#0
- decodes_sulkta_live_cobb_stake — 250 Terrapin, owner pkh c5e3..bfda,
utxo 0823a940...#1
Both assert byte-exact CBOR round-trip after decode → to_plutus_data
→ encode. This is the validator-critical property: the proposal
validator does `mkRecordConstr expectedDatum #== outputDatum`
on every output, so any drift in field order, integer width, or
empty-list shape would silently break vote/cosign/advance txs.
Companion to decodes_sulkta_live_proposal_zero in proposal.rs (which
covers the 8-field ProposalDatum side).
Kayos
6a408c319a