Ledger¶

This module defines the ledger transition system where valid transactions transform the ledger state.

{-# OPTIONS --safe #-}

import Data.List as L

open import Ledger.Prelude
open import Ledger.Dijkstra.Specification.Abstract
open import Ledger.Dijkstra.Specification.Transaction using (TransactionStructure)

module Ledger.Dijkstra.Specification.Ledger
  (txs : _) (open TransactionStructure txs)
  (abs : AbstractFunctions txs) (open AbstractFunctions abs)
  where

open import Ledger.Dijkstra.Specification.Enact govStructure
open import Ledger.Dijkstra.Specification.Gov govStructure
open import Ledger.Dijkstra.Specification.Utxo txs abs
open import Ledger.Dijkstra.Specification.Utxow txs abs
open import Ledger.Dijkstra.Specification.Certs govStructure
open import Ledger.Dijkstra.Specification.Entities txs

open EnactState using (cc)

LEDGER Transition System Types¶

record SubLedgerEnv : Type where
  field
    slot             : Slot
    ppolicy          : Maybe ScriptHash
    pparams          : PParams
    enactState       : EnactState
    treasury         : Treasury
    utxo₀            : UTxO
    rewards₀         : Rewards
    allScripts       : ℙ Script
    isTopLevelValid  : Bool

record LedgerEnv : Type where
  field
    slot        : Slot
    ppolicy     : Maybe ScriptHash
    pparams     : PParams
    enactState  : EnactState
    treasury    : Treasury

instance
  unquoteDecl HasCast-LedgerEnv HasCast-SubLedgerEnv = derive-HasCast
    ((quote LedgerEnv , HasCast-LedgerEnv) ∷ (quote SubLedgerEnv , HasCast-SubLedgerEnv) ∷ [])

  HasPParams-LedgerEnv : HasPParams LedgerEnv
  HasPParams-LedgerEnv .PParamsOf = LedgerEnv.pparams

  HasEnactState-LedgerEnv : HasEnactState LedgerEnv
  HasEnactState-LedgerEnv .EnactStateOf = LedgerEnv.enactState

  HasPParams-SubLedgerEnv : HasPParams SubLedgerEnv
  HasPParams-SubLedgerEnv .PParamsOf = SubLedgerEnv.pparams

  HasEnactState-SubLedgerEnv : HasEnactState SubLedgerEnv
  HasEnactState-SubLedgerEnv .EnactStateOf = SubLedgerEnv.enactState

  HasUTxO-SubLedgerEnv : HasUTxO SubLedgerEnv
  HasUTxO-SubLedgerEnv .UTxOOf = SubLedgerEnv.utxo₀

  HasTreasury-SubLedgerEnv : HasTreasury SubLedgerEnv
  HasTreasury-SubLedgerEnv .TreasuryOf = SubLedgerEnv.treasury

record LedgerState : Type where

  constructor ⟦_,_,_⟧ˡ

  field
    utxoSt     : UTxOState
    govSt      : GovState
    certState  : CertState

record HasLedgerState {a} (A : Type a) : Type a where
  field LedgerStateOf : A → LedgerState
open HasLedgerState ⦃...⦄ public

instance
  HasUTxOState-LedgerState : HasUTxOState LedgerState
  HasUTxOState-LedgerState .UTxOStateOf = LedgerState.utxoSt

  HasUTxO-LedgerState : HasUTxO LedgerState
  HasUTxO-LedgerState .UTxOOf = UTxOOf ∘ UTxOStateOf

  HasGovState-LedgerState : HasGovState LedgerState
  HasGovState-LedgerState .GovStateOf = LedgerState.govSt

  HasCertState-LedgerState : HasCertState LedgerState
  HasCertState-LedgerState .CertStateOf = LedgerState.certState

  HasPools-LedgerState : HasPools LedgerState
  HasPools-LedgerState .PoolsOf = PoolsOf ∘ CertStateOf

  HasGState-LedgerState : HasGState LedgerState
  HasGState-LedgerState .GStateOf = GStateOf ∘ CertStateOf

  HasDState-LedgerState : HasDState LedgerState
  HasDState-LedgerState .DStateOf = DStateOf ∘ CertStateOf

  HasPState-LedgerState : HasPState LedgerState
  HasPState-LedgerState .PStateOf = PStateOf ∘ CertStateOf

  HasVoteDelegs-LedgerState : HasVoteDelegs LedgerState
  HasVoteDelegs-LedgerState .VoteDelegsOf = VoteDelegsOf ∘ DStateOf ∘ CertStateOf

  HasDonations-LedgerState : HasDonations LedgerState
  HasDonations-LedgerState .DonationsOf = DonationsOf ∘ UTxOStateOf

  HasFees-LedgerState : HasFees LedgerState
  HasFees-LedgerState .FeesOf = FeesOf ∘ UTxOStateOf

  HasCCHotKeys-LedgerState : HasCCHotKeys LedgerState
  HasCCHotKeys-LedgerState .CCHotKeysOf = CCHotKeysOf ∘ GStateOf

  HasDReps-LedgerState : HasDReps LedgerState
  HasDReps-LedgerState .DRepsOf = DRepsOf ∘ CertStateOf

  unquoteDecl HasCast-LedgerState = derive-HasCast
    ((quote LedgerState , HasCast-LedgerState) ∷ [])

Helper Functions¶

txgov : ∀ {ℓ} → TxBody ℓ → List (GovVote ⊎ GovProposal)
txgov txb = map inj₂ txGovProposals ++ map inj₁ txGovVotes
  where open TxBody txb

GovProposals+Votes : ∀ {ℓ} → Tx ℓ → List (GovVote ⊎ GovProposal)
GovProposals+Votes tx = map inj₂ (ListOfGovProposalsOf tx) ++ map inj₁ (ListOfGovVotesOf tx)

rmOrphanDRepVotes : CertState → GovState → GovState
rmOrphanDRepVotes cs govSt = L.map (map₂ go) govSt
  where
   ifDRepRegistered : Credential → Type
   ifDRepRegistered c = c ∈ dom (DRepsOf cs)

   go : GovActionState → GovActionState
   go gas = record gas { votes = record (GovVotesOf gas) { gvDRep = filterKeys ifDRepRegistered (GovVotes.gvDRep (GovVotesOf gas)) } }

allColdCreds : GovState → EnactState → ℙ Credential
allColdCreds govSt es =
  ccCreds (es .cc) ∪ concatMapˢ (λ (_ , st) → proposedCC (GovActionOf st)) (fromList govSt)

LedgerState holds four coin-bearing components:

UTxO state (UTxO balance plus fees plus donations);
the rewards balance in DState.rewards, summed by coinFromRewards;
the three CertState deposit pots, summed by coinFromDeposits:
DState.deposits (stake-key deposits, Credential ⇀ Coin)
PState.deposits (pool deposits, KeyHash ⇀ Coin)
GState.deposits (DRep deposits, Credential ⇀ Coin);
the governance-action deposits, summed by coinFromGovDeposit over GovActionState.deposit for each action in the current GovState.

Components 2 and 3 are exactly getCoin of the CertState. Component 4 is needed because the UTXO batch-balance equation charges govProposalsDeposits on the produced side: the deposit leaves the UTxO pot when a proposal is submitted and is recorded in GovActionState.deposit by the GOV rule — it is not kept in GState.deposits, so coinFromDeposits alone does not account for it.

coinFromGovDeposit : GovState → Coin
coinFromGovDeposit = foldr (λ (_ , gaSt) acc → GovActionState.deposit gaSt + acc) 0

instance
  HasCoin-LedgerState : HasCoin LedgerState
  HasCoin-LedgerState .getCoin s =  getCoin (UTxOStateOf s)
                                    + coinFromRewards (CertStateOf s)
                                    + coinFromDeposits (CertStateOf s)
                                    + coinFromGovDeposit (GovStateOf s)

LEDGER Transition System¶

private variable
  utxo₀                             : UTxO
  utxoState₀ utxoState₁ utxoState₂  : UTxOState
  certState certState₀ certState₁ certState₂  : CertState
  govState₀  govState₁  govState₂   : GovState
  tx                                : TopLevelTx
  stx                               : SubLevelTx
  slot                              : Slot
  ppolicy                           : Maybe ScriptHash
  pp                                : PParams
  enactState                        : EnactState
  treasury                          : Treasury
  isTopLevelValid                   : Bool
  allScripts                        : ℙ Script
  rewards₀                          : Rewards

New in Dijkstra¶

In Dijkstra we compute the set of "global" scripts and data once at the top-level in the LEDGER rule. This is threaded through SUBLEDGER to UTXOW/SUBUTXOW via UTxOEnv/SubUTxOEnv.

allScripts : ℙ Script is the union of all scripts relevant to the entire batch: scripts referenced/witnessed by the top-level transaction plus scripts referenced/witnessed by every subtransaction (computed by getAllScripts).
legacyMode : Bool records whether the top-level transaction must be processed in legacy mode, i.e., whether some phase-2 script it needs uses a Plutus language older than V4 (computed by isLegacyMode). The decision is made once, here, and threaded to UTXOW/UTXO via UTxOEnv and to ENTITIES via EntitiesEnv.

Design Rationale for Ledger Rule Premises¶

Batch-scoped phase-2 context.

We compute allScripts once, from the pre-batch UTxO snapshot and the full batch (top-level transaction and all subtransactions). This ensures a shared, batch-scoped pool of scripts for phase-2 validation.

Subtransactions are conditional on top-level validity.
If IsValidFlagOf txTop ≡ true, then each subtransaction parametrizes its own UTXOW/CERTS/GOVS relation and the resulting (codomain) states are carried forward (via SUBLEDGERS).
If IsValidFlagOf txTop ≡ false, then SUBLEDGERS is the identity relation (no subtransaction effects are applied).
Connecting top-level CERTS and GOVS relations relative to UTXOW.

We check top-level CERTS and GOVS relations before top-level UTXOW because:

CERTS tracks deposit updates (now included in CertState),
UTXO accounting needs the net deposit change of the whole batch in the UTxOEnv (used in newDepositsBatch / depositRefundsBatch in the Utxo.Accounting module).
CertState and GovState Dependencies.
Top-level CERTS relates the post-SUBLEDGERS CertState (which reflects subtransaction certificates) to the final CertState.
Top-level GOVS relates the post-SUBLEDGERS GovState (which relfects proposals/votes of subtransactions) to the final GovState, and is parameterized by the final CertState (so it sees the final registered DRep set after certificates).
Orphan DRep votes are removed using the final (post-CERTS) CertState.
allColdCreds uses the final GovState

The CertEnv assumed in the CERTS relation includes allColdCreds govState₁ enactState to so that CC hot key registration can account for both enacted CC credentials and any newly proposed CC actions that appear in the final (post-subtransaction processing) GovState.

data _⊢_⇀⦇_,SUBLEDGER⦈_ : SubLedgerEnv → LedgerState → SubLevelTx → LedgerState → Type where

  SUBLEDGER-V :
      ∙ isTopLevelValid ≡ true
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{11265}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{11272}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{11277}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7039}{\htmlId{11288}{\htmlClass{Generalizable}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7616}{\htmlId{11296}{\htmlClass{Generalizable}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7573}{\htmlId{11309}{\htmlClass{Generalizable}{\text{isTopLevelValid}}}}\, \end{pmatrix}$ ⊢ utxoState₀ ⇀⦇ stx ,SUBUTXOW⦈ utxoState₁
      ∙ $\begin{pmatrix} \,\href{Ledger.Core.Specification.Epoch.html#954}{\htmlId{11379}{\htmlClass{Function}{\text{epoch}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{11385}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{11392}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#5048}{\htmlId{11397}{\htmlClass{Function}{\text{allColdCreds}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{11410}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{11420}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7663}{\htmlId{11433}{\htmlClass{Generalizable}{\text{rewards₀}}}}\, \end{pmatrix}$ ⊢ certState₀ ⇀⦇ stx ,SUBENTITIES⦈ certState₁
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Transaction.html#11069}{\htmlId{11499}{\htmlClass{Field}{\text{TxIdOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7284}{\htmlId{11506}{\htmlClass{Generalizable}{\text{stx}}}}\, \\ \,\href{Ledger.Core.Specification.Epoch.html#954}{\htmlId{11512}{\htmlClass{Function}{\text{epoch}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{11518}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{11525}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{11530}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{11540}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7151}{\htmlId{11553}{\htmlClass{Generalizable}{\text{certState₁}}}}\, \\ \,\href{Class.IsSet.html#916}{\htmlId{11566}{\htmlClass{Function}{\text{dom}}}}\, \,\htmlId{11570}{\htmlClass{Symbol}{\text{(}}}\,\,\href{Ledger.Dijkstra.Specification.Certs.html#4742}{\htmlId{11571}{\htmlClass{Field}{\text{RewardsOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7151}{\htmlId{11581}{\htmlClass{Generalizable}{\text{certState₁}}}}\,\,\htmlId{11591}{\htmlClass{Symbol}{\text{)}}}\, \end{pmatrix}$ ⊢ govState₀ ⇀⦇ GovProposals+Votes stx ,GOVS⦈ govState₁
        ────────────────────────────────
        $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{11701}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{11708}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{11718}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{11723}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{11736}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7039}{\htmlId{11747}{\htmlClass{Generalizable}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7663}{\htmlId{11755}{\htmlClass{Generalizable}{\text{rewards₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7616}{\htmlId{11766}{\htmlClass{Generalizable}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7573}{\htmlId{11779}{\htmlClass{Generalizable}{\text{isTopLevelValid}}}}\, \end{pmatrix}$ ⊢ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{11801}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{11814}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{11826}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$ ⇀⦇ stx ,SUBLEDGER⦈ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7093}{\htmlId{11860}{\htmlClass{Generalizable}{\text{utxoState₁}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7199}{\htmlId{11873}{\htmlClass{Generalizable}{\text{govState₁}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7151}{\htmlId{11885}{\htmlClass{Generalizable}{\text{certState₁}}}}\, \end{pmatrix}$

  SUBLEDGER-I :
      ∙ isTopLevelValid ≡ false
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{11957}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{11964}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{11969}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7039}{\htmlId{11980}{\htmlClass{Generalizable}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7616}{\htmlId{11988}{\htmlClass{Generalizable}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7573}{\htmlId{12001}{\htmlClass{Generalizable}{\text{isTopLevelValid}}}}\,  \end{pmatrix}$ ⊢ utxoState₀ ⇀⦇ stx ,SUBUTXOW⦈ utxoState₀
        ────────────────────────────────
        $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{12113}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{12120}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{12130}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{12135}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{12148}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7039}{\htmlId{12159}{\htmlClass{Generalizable}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7663}{\htmlId{12167}{\htmlClass{Generalizable}{\text{rewards₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7616}{\htmlId{12178}{\htmlClass{Generalizable}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7573}{\htmlId{12191}{\htmlClass{Generalizable}{\text{isTopLevelValid}}}}\, \end{pmatrix}$ ⊢ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{12213}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{12226}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{12238}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$ ⇀⦇ stx ,SUBLEDGER⦈ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{12272}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{12285}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{12297}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$

_⊢_⇀⦇_,SUBLEDGERS⦈_ : SubLedgerEnv → LedgerState → List SubLevelTx → LedgerState → Type
_⊢_⇀⦇_,SUBLEDGERS⦈_ = ReflexiveTransitiveClosure {sts = _⊢_⇀⦇_,SUBLEDGER⦈_}


data _⊢_⇀⦇_,LEDGER⦈_ : LedgerEnv → LedgerState → TopLevelTx → LedgerState → Type where

  LEDGER-V :
    let  utxo₀ : UTxO
         utxo₀ = UTxOOf utxoState₀

         rewards₀ : Rewards
         rewards₀ = RewardsOf certState₀

         allScripts : ℙ Script
         allScripts = getAllScripts tx utxo₀

         legacyMode : Bool
         legacyMode = isLegacyMode utxo₀ allScripts tx
    in
      ∙ IsValidFlagOf tx ≡ true
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{12914}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{12921}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{12931}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{12936}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{12949}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12587}{\htmlId{12960}{\htmlClass{Bound}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12645}{\htmlId{12968}{\htmlClass{Bound}{\text{rewards₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12715}{\htmlId{12979}{\htmlClass{Bound}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Transaction.html#13753}{\htmlId{12992}{\htmlClass{Field}{\text{IsValidFlagOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7235}{\htmlId{13006}{\htmlClass{Generalizable}{\text{tx}}}}\, \end{pmatrix}$ ⊢ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{13015}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{13028}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{13040}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$ ⇀⦇ SubTransactionsOf tx ,SUBLEDGERS⦈ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7093}{\htmlId{13092}{\htmlClass{Generalizable}{\text{utxoState₁}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7199}{\htmlId{13105}{\htmlClass{Generalizable}{\text{govState₁}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7151}{\htmlId{13117}{\htmlClass{Generalizable}{\text{certState₁}}}}\, \end{pmatrix}$
      ∙ $\begin{pmatrix} \,\href{Ledger.Core.Specification.Epoch.html#954}{\htmlId{13140}{\htmlClass{Function}{\text{epoch}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{13146}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{13153}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#5048}{\htmlId{13158}{\htmlClass{Function}{\text{allColdCreds}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7199}{\htmlId{13171}{\htmlClass{Generalizable}{\text{govState₁}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{13181}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12792}{\htmlId{13194}{\htmlClass{Bound}{\text{legacyMode}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12645}{\htmlId{13207}{\htmlClass{Bound}{\text{rewards₀}}}}\, \end{pmatrix}$ ⊢ certState₁ ⇀⦇ tx ,ENTITIES⦈ certState₂
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Transaction.html#11069}{\htmlId{13269}{\htmlClass{Field}{\text{TxIdOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7235}{\htmlId{13276}{\htmlClass{Generalizable}{\text{tx}}}}\, \\ \,\href{Ledger.Core.Specification.Epoch.html#954}{\htmlId{13281}{\htmlClass{Function}{\text{epoch}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{13287}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{13294}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{13299}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{13309}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7162}{\htmlId{13322}{\htmlClass{Generalizable}{\text{certState₂}}}}\, \\ \,\href{Class.IsSet.html#916}{\htmlId{13335}{\htmlClass{Function}{\text{dom}}}}\, \,\htmlId{13339}{\htmlClass{Symbol}{\text{(}}}\,\,\href{Ledger.Dijkstra.Specification.Certs.html#4742}{\htmlId{13340}{\htmlClass{Field}{\text{RewardsOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7162}{\htmlId{13350}{\htmlClass{Generalizable}{\text{certState₂}}}}\,\,\htmlId{13360}{\htmlClass{Symbol}{\text{)}}}\, \end{pmatrix}$ ⊢ govState₁ ⇀⦇ GovProposals+Votes tx ,GOVS⦈ govState₂
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{13428}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{13435}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{13440}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12587}{\htmlId{13451}{\htmlClass{Bound}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Certs.html#4398}{\htmlId{13459}{\htmlClass{Field}{\text{PoolsOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{13467}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12715}{\htmlId{13480}{\htmlClass{Bound}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#12792}{\htmlId{13493}{\htmlClass{Bound}{\text{legacyMode}}}}\, \end{pmatrix}$ ⊢ utxoState₁ ⇀⦇ tx ,UTXOW⦈ utxoState₂
        ────────────────────────────────
        $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{13595}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{13602}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{13612}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{13617}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{13630}{\htmlClass{Generalizable}{\text{treasury}}}}\, \end{pmatrix}$ ⊢ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{13645}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{13658}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{13670}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$ ⇀⦇ tx ,LEDGER⦈ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7104}{\htmlId{13700}{\htmlClass{Generalizable}{\text{utxoState₂}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#4675}{\htmlId{13713}{\htmlClass{Function}{\text{rmOrphanDRepVotes}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7162}{\htmlId{13731}{\htmlClass{Generalizable}{\text{certState₂}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7210}{\htmlId{13742}{\htmlClass{Generalizable}{\text{govState₂}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7162}{\htmlId{13754}{\htmlClass{Generalizable}{\text{certState₂}}}}\, \end{pmatrix}$

  LEDGER-I :
    let  utxo₀ : UTxO
         utxo₀ = UTxOOf utxoState₀

         rewards₀ : Rewards
         rewards₀ = RewardsOf certState₀

         allScripts : ℙ Script
         allScripts = getAllScripts tx utxo₀

         legacyMode : Bool
         legacyMode = isLegacyMode utxo₀ allScripts tx
    in
      ∙ IsValidFlagOf tx ≡ false
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{14118}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{14125}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{14135}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{14140}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{14153}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#13790}{\htmlId{14164}{\htmlClass{Bound}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#13848}{\htmlId{14172}{\htmlClass{Bound}{\text{rewards₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#13918}{\htmlId{14183}{\htmlClass{Bound}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Transaction.html#13753}{\htmlId{14196}{\htmlClass{Field}{\text{IsValidFlagOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7235}{\htmlId{14210}{\htmlClass{Generalizable}{\text{tx}}}}\, \end{pmatrix}$ ⊢ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{14219}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{14232}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{14244}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$ ⇀⦇ SubTransactionsOf tx ,SUBLEDGERS⦈ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{14296}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{14309}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{14321}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$
      ∙ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{14344}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{14351}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{14356}{\htmlClass{Generalizable}{\text{treasury}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#13790}{\htmlId{14367}{\htmlClass{Bound}{\text{utxo₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Certs.html#4398}{\htmlId{14375}{\htmlClass{Field}{\text{PoolsOf}}}}\, \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{14383}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#13918}{\htmlId{14396}{\htmlClass{Bound}{\text{allScripts}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#13995}{\htmlId{14409}{\htmlClass{Bound}{\text{legacyMode}}}}\, \end{pmatrix}$ ⊢ utxoState₀ ⇀⦇ tx ,UTXOW⦈ utxoState₁
        ────────────────────────────────
        $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7333}{\htmlId{14511}{\htmlClass{Generalizable}{\text{slot}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7376}{\htmlId{14518}{\htmlClass{Generalizable}{\text{ppolicy}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7431}{\htmlId{14528}{\htmlClass{Generalizable}{\text{pp}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7477}{\htmlId{14533}{\htmlClass{Generalizable}{\text{enactState}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7526}{\htmlId{14546}{\htmlClass{Generalizable}{\text{treasury}}}}\, \end{pmatrix}$ ⊢ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7082}{\htmlId{14561}{\htmlClass{Generalizable}{\text{utxoState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{14574}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{14586}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$ ⇀⦇ tx ,LEDGER⦈ $\begin{pmatrix} \,\href{Ledger.Dijkstra.Specification.Ledger.html#7093}{\htmlId{14616}{\htmlClass{Generalizable}{\text{utxoState₁}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7188}{\htmlId{14629}{\htmlClass{Generalizable}{\text{govState₀}}}}\, \\ \,\href{Ledger.Dijkstra.Specification.Ledger.html#7140}{\htmlId{14641}{\htmlClass{Generalizable}{\text{certState₀}}}}\, \end{pmatrix}$

_⊢_⇀⦇_,LEDGERS⦈_ : LedgerEnv → LedgerState → List TopLevelTx → LedgerState → Type
_⊢_⇀⦇_,LEDGERS⦈_ = ReflexiveTransitiveClosure {sts = _⊢_⇀⦇_,LEDGER⦈_}