From c365dafbeed3faae277a31dca834d9ddd285f8ae Mon Sep 17 00:00:00 2001
From: Emanuel Pargov <bamzedev@gmail.com>
Date: Wed, 27 Nov 2024 22:34:23 +0200
Subject: [PATCH] Fix disputes and add test vectors for v0.4.5

---
 internal/statetransition/state_transition.go  | 412 ++++++++++++++++--
 .../statetransition/state_transition_test.go  | 102 +----
 tests/integration/disputes_test.go            | 337 ++++++++++++++
 .../vectors/disputes/disputes1.json           | 233 ++++++++++
 .../vectors/disputes/disputes2.json           | 222 ++++++++++
 .../tiny/progress_with_bad_signatures-1.json  | 233 ++++++++++
 .../tiny/progress_with_bad_signatures-2.json  | 243 +++++++++++
 .../tiny/progress_with_culprits-1.json        | 222 ++++++++++
 .../tiny/progress_with_culprits-2.json        | 228 ++++++++++
 .../tiny/progress_with_culprits-3.json        | 233 ++++++++++
 .../tiny/progress_with_culprits-4.json        | 243 +++++++++++
 .../tiny/progress_with_culprits-5.json        | 237 ++++++++++
 .../tiny/progress_with_culprits-6.json        | 237 ++++++++++
 .../tiny/progress_with_culprits-7.json        | 238 ++++++++++
 .../disputes/tiny/progress_with_faults-1.json | 222 ++++++++++
 .../disputes/tiny/progress_with_faults-2.json | 237 ++++++++++
 .../disputes/tiny/progress_with_faults-3.json | 235 ++++++++++
 .../disputes/tiny/progress_with_faults-4.json | 245 +++++++++++
 .../disputes/tiny/progress_with_faults-5.json | 233 ++++++++++
 .../disputes/tiny/progress_with_faults-6.json | 233 ++++++++++
 .../disputes/tiny/progress_with_faults-7.json | 235 ++++++++++
 .../tiny/progress_with_no_verdicts-1.json     | 192 ++++++++
 ...erdict_signatures_from_previous_set-1.json | 243 +++++++++++
 ...erdict_signatures_from_previous_set-2.json | 233 ++++++++++
 .../tiny/progress_with_verdicts-1.json        | 229 ++++++++++
 .../tiny/progress_with_verdicts-2.json        | 229 ++++++++++
 .../tiny/progress_with_verdicts-3.json        | 271 ++++++++++++
 .../tiny/progress_with_verdicts-4.json        | 285 ++++++++++++
 .../tiny/progress_with_verdicts-5.json        | 249 +++++++++++
 .../tiny/progress_with_verdicts-6.json        | 242 ++++++++++
 30 files changed, 7102 insertions(+), 131 deletions(-)
 create mode 100644 tests/integration/disputes_test.go
 create mode 100644 tests/integration/vectors/disputes/disputes1.json
 create mode 100644 tests/integration/vectors/disputes/disputes2.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-1.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-2.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-1.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-2.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-3.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-4.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-5.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-6.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_culprits-7.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-1.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-2.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-3.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-4.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-5.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-6.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_faults-7.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_no_verdicts-1.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-1.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-2.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdicts-1.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdicts-2.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdicts-3.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdicts-4.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdicts-5.json
 create mode 100644 tests/integration/vectors/disputes/tiny/progress_with_verdicts-6.json

diff --git a/internal/statetransition/state_transition.go b/internal/statetransition/state_transition.go
index 0b0abeb..6a2893c 100644
--- a/internal/statetransition/state_transition.go
+++ b/internal/statetransition/state_transition.go
@@ -28,8 +28,10 @@ import (
 )
 
 const (
-	signatureContextGuarantee = "$jam_guarantee"  // X_G ≡ $jam_guarantee (141 v0.4.5)
-	signatureContextAvailable = "$jam_available " // X_A ≡ $jam_available (128 v0.4.5)
+	signatureContextGuarantee = "jam_guarantee" // X_G ≡ $jam_guarantee (141 v0.4.5)
+	signatureContextAvailable = "jam_available" // X_A ≡ $jam_available (128 v0.4.5)
+	signatureContextValid     = "jam_valid"     // X_A ≡ $jam_valid (128 v0.4.5)
+	signatureContextInvalid   = "jam_invalid"   // X_A ≡ $jam_invalid (128 v0.4.5)
 )
 
 // UpdateState updates the state
@@ -98,7 +100,10 @@ func UpdateState(s *state.State, newBlock block.Block) error {
 		return err
 	}
 
-	newJudgements := calculateNewJudgements(newBlock.Extrinsic.ED, s.PastJudgements)
+	newJudgements, err := CalculateNewJudgements(newTimeState, newBlock.Extrinsic.ED, s.PastJudgements, s.ValidatorState)
+	if err != nil {
+		return err
+	}
 
 	newCoreAuthorizations := calculateNewCoreAuthorizations(newBlock.Header, newBlock.Extrinsic.EG, newPendingCoreAuthorizations, s.CoreAuthorizersPool)
 
@@ -765,38 +770,75 @@ func addUniqueEdPubKey(slice []ed25519.PublicKey, key ed25519.PublicKey) []ed255
 	return append(slice, key)
 }
 
-// processVerdict categorizes a verdict based on positive judgments. Equations 111, 112, 113.
-func processVerdict(judgements *state.Judgements, verdict block.Verdict) {
-	positiveJudgments := 0
-	for _, judgment := range verdict.Judgements {
-		if judgment.IsValid {
-			positiveJudgments++
-		}
+// calculateNewJudgements Equation 23: ψ′ ≺ (ED, ψ)
+// Equations 112-115:(v0.4.5)
+// ψ'g ≡ ψg ∪ {r | {r, ⌊2/3V⌋ + 1} ∈ V}
+// ψ'b ≡ ψb ∪ {r | {r, 0} ∈ V}
+// ψ'w ≡ ψw ∪ {r | {r, ⌊1/3V⌋} ∈ V}
+// ψ'o ≡ ψo ∪ {k | (r, k, s) ∈ c} ∪ {k | (r, v, k, s) ∈ f}
+func CalculateNewJudgements(newTimeslot jamtime.Timeslot, disputes block.DisputeExtrinsic, stateJudgements state.Judgements, validators validator.ValidatorState) (state.Judgements, error) {
+	if err := verifySortedUnique(disputes); err != nil {
+		return stateJudgements, err
+	}
+
+	if err := verifyAllSignatures(newTimeslot, disputes, validators); err != nil {
+		return stateJudgements, err
+	}
+
+	if err := verifyNotAlreadyOffending(disputes.Faults, stateJudgements.OffendingValidators); err != nil {
+		return stateJudgements, err
 	}
 
-	switch positiveJudgments {
-	// Equation 111: ψ'g ≡ ψg ∪ {r | {r, ⌊2/3V⌋ + 1} ∈ V}
-	case common.ValidatorsSuperMajority:
-		judgements.GoodWorkReports = addUniqueHash(judgements.GoodWorkReports, verdict.ReportHash)
-		// Equation 112: ψ'b ≡ ψb ∪ {r | {r, 0} ∈ V}
-	case 0:
-		judgements.BadWorkReports = addUniqueHash(judgements.BadWorkReports, verdict.ReportHash)
-		// Equation 113: ψ'w ≡ ψw ∪ {r | {r, ⌊1/3V⌋} ∈ V}
-	case common.NumberOfValidators / 3:
-		judgements.WonkyWorkReports = addUniqueHash(judgements.WonkyWorkReports, verdict.ReportHash)
-		// TODO: The GP gives only the above 3 cases. Check back later how can we be sure only the above 3 cases are possible.
-	default:
-		panic(fmt.Sprintf("Unexpected number of positive judgments: %d", positiveJudgments))
+	if err := verifyNotAlreadyJudged(disputes.Verdicts, stateJudgements); err != nil {
+		return stateJudgements, err
 	}
+
+	newJudgements := copyJudgements(stateJudgements)
+
+	if err := verifyFaults(disputes.Faults, disputes.Verdicts, stateJudgements.OffendingValidators); err != nil {
+		return stateJudgements, err
+	}
+
+	if err := processVerdicts(disputes, &newJudgements); err != nil {
+		return stateJudgements, err
+	}
+
+	if err := processCulprits(disputes.Culprits, disputes.Verdicts, &newJudgements); err != nil {
+		return stateJudgements, err
+	}
+
+	return newJudgements, nil
 }
 
-// processOffender adds an offending validator to the list
-func processOffender(judgements *state.Judgements, key ed25519.PublicKey) {
-	judgements.OffendingValidators = addUniqueEdPubKey(judgements.OffendingValidators, key)
+// Equation 101:(v0.4.5)
+// ∀(r, k, s) ∈ c : ⋀{r ∈ ψ'b, k ∈ k, s ∈ Ek⟨XG ⌢ r⟩}
+func verifyNotAlreadyOffending(faults []block.Fault, offendingValidators []ed25519.PublicKey) error {
+	for _, fault := range faults {
+		if containsKey(offendingValidators, fault.ValidatorEd25519PublicKey) {
+			return errors.New("offender already reported")
+		}
+	}
+	return nil
 }
 
-// calculateNewJudgements Equation 23: ψ′ ≺ (ED, ψ)
-func calculateNewJudgements(disputes block.DisputeExtrinsic, stateJudgements state.Judgements) state.Judgements {
+// Equations 103, 104, 106:(v0.4.5)
+// v = [r __ {r, a, j} ∈ v]  (Verdicts must be ordered by report hash)
+// c = [k __ {r, k, s} ∈ c]  (Culprits must be ordered by validator key)
+// f = [k __ {r, v, k, s} ∈ f]  (Faults must be ordered by validator key)
+// ∀(r, a, j) ∈ v : j = [i __ {v, i, s} ∈ j]  (Judgments within verdicts must be ordered by validator index)
+func verifyNotAlreadyJudged(verdicts []block.Verdict, stateJudgements state.Judgements) error {
+	for _, verdict := range verdicts {
+		reportHash := verdict.ReportHash
+		if contains(stateJudgements.GoodWorkReports, reportHash) ||
+			contains(stateJudgements.BadWorkReports, reportHash) ||
+			contains(stateJudgements.WonkyWorkReports, reportHash) {
+			return errors.New("already judged")
+		}
+	}
+	return nil
+}
+
+func copyJudgements(stateJudgements state.Judgements) state.Judgements {
 	newJudgements := state.Judgements{
 		BadWorkReports:      make([]crypto.Hash, len(stateJudgements.BadWorkReports)),
 		GoodWorkReports:     make([]crypto.Hash, len(stateJudgements.GoodWorkReports)),
@@ -809,20 +851,322 @@ func calculateNewJudgements(disputes block.DisputeExtrinsic, stateJudgements sta
 	copy(newJudgements.WonkyWorkReports, stateJudgements.WonkyWorkReports)
 	copy(newJudgements.OffendingValidators, stateJudgements.OffendingValidators)
 
-	// Process verdicts (Equations 111, 112, 113)
+	return newJudgements
+}
+
+// Equations 109, 110, 111:(v0.4.5)
+// ∀(r, ⌊2/3V⌋ + 1) ∈ V : ∃(r, ...) ∈ f  (For positive verdicts, must have corresponding fault)
+// ∀(r, 0) ∈ V : |{(r, ...) ∈ c}| ≥ 2  (For negative verdicts, must have at least 2 culprits)
+//
+//	∀c ∈ NC : ρ†[c] = {
+//	    ∅ if {(H(ρ[c]w), t) ∈ V, t < ⌊2/3V⌋}
+//	    ρ[c] otherwise
+//	}
+func processVerdicts(disputes block.DisputeExtrinsic, newJudgements *state.Judgements) error {
+	const V = common.NumberOfValidators // Total number of validators
+	twoThirdsPlusOne := (2 * V / 3) + 1 // ⌊2/3V⌋ + 1
+	oneThird := V / 3                   // ⌊1/3V⌋
+
+	for _, verdict := range disputes.Verdicts {
+		positiveJudgments := block.CountPositiveJudgments(verdict.Judgements)
+
+		switch positiveJudgments {
+		case twoThirdsPlusOne:
+			if err := processPositiveVerdict(verdict, disputes.Faults, newJudgements); err != nil {
+				return err
+			}
+
+		case 0:
+			if err := processNegativeVerdict(verdict, disputes.Culprits, newJudgements); err != nil {
+				return err
+			}
+
+		case oneThird:
+			processWonkyVerdict(verdict, newJudgements)
+
+		default:
+			return fmt.Errorf("bad vote split")
+		}
+	}
+
+	return nil
+}
+
+// Equations 109, 110:(v0.4.5)
+// ∀(r, ⌊2/3V⌋ + 1) ∈ V : ∃(r, ...) ∈ f
+func processPositiveVerdict(verdict block.Verdict, faults []block.Fault, newJudgements *state.Judgements) error {
+	validFaults := 0
+	for _, fault := range faults {
+		if fault.ReportHash != verdict.ReportHash || fault.IsValid {
+			continue
+		}
+		validFaults++
+		if !containsKey(newJudgements.OffendingValidators, fault.ValidatorEd25519PublicKey) {
+			newJudgements.OffendingValidators = append(newJudgements.OffendingValidators, fault.ValidatorEd25519PublicKey)
+		}
+	}
+
+	if validFaults == 0 {
+		return errors.New("not enough faults")
+	}
+
+	newJudgements.GoodWorkReports = append(newJudgements.GoodWorkReports, verdict.ReportHash)
+	return nil
+}
+
+// Related to Equation 110:(v0.4.5)
+// ∀(r, 0) ∈ V : |{(r, ...) ∈ c}| ≥ 2
+func processNegativeVerdict(verdict block.Verdict, culprits []block.Culprit, newJudgements *state.Judgements) error {
+	if len(culprits) < 2 {
+		return errors.New("not enough culprits")
+	}
+	newJudgements.BadWorkReports = append(newJudgements.BadWorkReports, verdict.ReportHash)
+	return nil
+}
+
+// Related to Equation 114:(v0.4.5)
+// ψ'w ≡ ψw ∪ {r | {r, ⌊1/3V⌋} ∈ V}
+func processWonkyVerdict(verdict block.Verdict, newJudgements *state.Judgements) {
+	newJudgements.WonkyWorkReports = append(newJudgements.WonkyWorkReports, verdict.ReportHash)
+}
+
+// Equations 101, 102, 104, 105: (v0.4.5)
+// c = [k __ {r, k, s} ∈ c]  (Culprits must be ordered)
+//
+//	∀(r, k, s) ∈ c : ⋀{
+//	    r ∈ ψ'b,  (Report must be in bad reports)
+//	    k ∈ k,    (Key must be valid validator)
+//	    s ∈ Ek⟨XG ⌢ r⟩  (Signature must be valid)
+//	}
+//
+//	∀(r, v, k, s) ∈ f : ⋀{
+//	    r ∈ ψ'b ⇔ r ∉ ψ'g ⇔ v,
+//	    k ∈ k,
+//	    s ∈ Ek⟨Xv ⌢ r⟩
+//	}
+//
+// {r | {r, a, j} ∈ v} ⫰ ψg ∪ ψb ∪ ψw  (Reports must not have been previously judged)
+func processCulprits(culprits []block.Culprit, verdicts []block.Verdict, newJudgements *state.Judgements) error {
+	for _, culprit := range culprits {
+		// Find corresponding verdict
+		var allNegative bool
+		for _, verdict := range verdicts {
+			if verdict.ReportHash == culprit.ReportHash {
+				// Check if all votes are false
+				positiveJudgments := block.CountPositiveJudgments(verdict.Judgements)
+				if positiveJudgments > 0 {
+					return errors.New("bad vote split")
+				}
+				allNegative = true
+				break
+			}
+		}
+		if !allNegative {
+			return errors.New("culprits verdict not bad")
+		}
+	}
+
+	// Process culprits
+	if err := verifyCulprits(culprits, newJudgements.BadWorkReports, newJudgements.OffendingValidators); err != nil {
+		return err
+	}
+
+	for _, culprit := range culprits {
+		if !containsKey(newJudgements.OffendingValidators, culprit.ValidatorEd25519PublicKey) {
+			newJudgements.OffendingValidators = append(newJudgements.OffendingValidators, culprit.ValidatorEd25519PublicKey)
+		}
+	}
+
+	return nil
+}
+
+// Equations 103, 104, 106:
+// v = [r __ {r, a, j} ∈ v]  (Verdicts must be ordered by report hash)
+// c = [k __ {r, k, s} ∈ c]  (Faults must be ordered by validator key)
+// f = [k __ {r, v, k, s} ∈ f]  (Faults must be ordered by validator key)
+// ∀(r, a, j) ∈ v : j = [i __ {v, i, s} ∈ j]  (Judgments within verdicts must be ordered by validator index)
+func verifySortedUnique(disputes block.DisputeExtrinsic) error {
+	// Check faults are sorted unique
+	for i := 1; i < len(disputes.Faults); i++ {
+		if bytes.Compare(disputes.Faults[i-1].ValidatorEd25519PublicKey, disputes.Faults[i].ValidatorEd25519PublicKey) >= 0 {
+			return errors.New("faults not sorted unique")
+		}
+	}
+
+	// Check verdicts are sorted unique
+	for i := 1; i < len(disputes.Verdicts); i++ {
+		if bytes.Compare(disputes.Verdicts[i-1].ReportHash[:], disputes.Verdicts[i].ReportHash[:]) >= 0 {
+			return errors.New("verdicts not sorted unique")
+		}
+	}
+
+	// Check judgements within verdicts are sorted unique
 	for _, verdict := range disputes.Verdicts {
-		processVerdict(&newJudgements, verdict)
+		for i := 1; i < len(verdict.Judgements); i++ {
+			if verdict.Judgements[i-1].ValidatorIndex >= verdict.Judgements[i].ValidatorIndex {
+				return errors.New("judgements not sorted unique")
+			}
+		}
 	}
 
-	// Process culprits and faults (Equation 114)
+	return nil
+}
+
+// Related to Equation 99:(v0.4.5)
+// ∀(r, a, j) ∈ v, ∀(v, i, s) ∈ j : s ∈ Ek[i]e⟨Xv ⌢ r⟩
+func verifyAllSignatures(newTimeslot jamtime.Timeslot, disputes block.DisputeExtrinsic, validators validator.ValidatorState) error {
+	// Verify verdict signatures
+	for _, verdict := range disputes.Verdicts {
+		if err := verifyVerdictSignatures(newTimeslot, verdict, validators.CurrentValidators, validators.ArchivedValidators); err != nil {
+			return err
+		}
+	}
+
+	// Verify culprit signatures
 	for _, culprit := range disputes.Culprits {
-		processOffender(&newJudgements, culprit.ValidatorEd25519PublicKey)
+		message := append([]byte(signatureContextGuarantee), culprit.ReportHash[:]...)
+		if !ed25519.Verify(culprit.ValidatorEd25519PublicKey, message, culprit.Signature[:]) {
+			return errors.New("bad signature")
+		}
 	}
+
+	// Verify fault signatures
 	for _, fault := range disputes.Faults {
-		processOffender(&newJudgements, fault.ValidatorEd25519PublicKey)
+		context := signatureContextValid
+		if !fault.IsValid {
+			context = signatureContextInvalid
+		}
+		message := append([]byte(context), fault.ReportHash[:]...)
+		if !ed25519.Verify(fault.ValidatorEd25519PublicKey, message, fault.Signature[:]) {
+			return errors.New("bad signature")
+		}
 	}
 
-	return newJudgements
+	return nil
+}
+
+// Related to Equation 99:(v0.4.5)
+// ∀(r, a, j) ∈ v, ∀(v, i, s) ∈ j :
+// s ∈ Ek[i]e⟨Xv ⌢ r⟩ where k = κ if a = ⌊τ/E⌋, λ otherwise
+func verifyVerdictSignatures(newTimeslot jamtime.Timeslot, verdict block.Verdict, currentValidators, archivedValidators safrole.ValidatorsData) error {
+	currentEpoch := uint32(newTimeslot.ToEpoch())
+	validatorSet := currentValidators
+	if verdict.EpochIndex != currentEpoch {
+		validatorSet = archivedValidators
+	}
+
+	// Verify signatures before checking age
+	for _, judgment := range verdict.Judgements {
+		if judgment.ValidatorIndex >= uint16(len(validatorSet)) {
+			return errors.New("invalid validator index")
+		}
+
+		context := signatureContextValid
+		if !judgment.IsValid {
+			context = signatureContextInvalid
+		}
+
+		message := append([]byte(context), verdict.ReportHash[:]...)
+
+		if !ed25519.Verify(validatorSet[judgment.ValidatorIndex].Ed25519, message, judgment.Signature[:]) {
+			return errors.New("bad signature")
+		}
+	}
+	// Age checks come after signature verification
+	if verdict.EpochIndex > currentEpoch {
+		return errors.New("bad judgement age")
+	}
+	if currentEpoch-verdict.EpochIndex > 1 {
+		return errors.New("bad judgement age")
+	}
+
+	return nil
+}
+
+// Related to Equations 101, 102:(v0.4.5)
+// ∀(r, k, s) ∈ c : ⋀{r ∈ ψ'b, k ∈ k, s ∈ Ek⟨XG ⌢ r⟩}
+// ∀(r, v, k, s) ∈ f : ⋀{r ∈ ψ'b ⇔ r ∉ ψ'g ⇔ v, k ∈ k, s ∈ Ek⟨Xv ⌢ r⟩}
+func verifyCulprits(culprits []block.Culprit, badReports []crypto.Hash, offendingValidators []ed25519.PublicKey) error {
+	for i := 1; i < len(culprits); i++ {
+		if bytes.Compare(culprits[i-1].ValidatorEd25519PublicKey, culprits[i].ValidatorEd25519PublicKey) >= 0 {
+			return errors.New("culprits not sorted unique")
+		}
+	}
+	for _, culprit := range culprits {
+		// Verify guarantee signature
+		message := append([]byte(signatureContextGuarantee), culprit.ReportHash[:]...)
+		if !ed25519.Verify(culprit.ValidatorEd25519PublicKey, message, culprit.Signature[:]) {
+			return errors.New("bad signature")
+		}
+		// Must be in bad reports
+		if !contains(badReports, culprit.ReportHash) {
+			return errors.New("culprits verdict not bad")
+		}
+
+		// Must not already be in offending validators
+		if containsKey(offendingValidators, culprit.ValidatorEd25519PublicKey) {
+			return errors.New("offender already reported")
+		}
+	}
+	return nil
+}
+
+// Related to Equations 101, 102:(v0.4.5)
+// ∀(r, k, s) ∈ c : ⋀{r ∈ ψ'b, k ∈ k, s ∈ Ek⟨XG ⌢ r⟩}
+// ∀(r, v, k, s) ∈ f : ⋀{r ∈ ψ'b ⇔ r ∉ ψ'g ⇔ v, k ∈ k, s ∈ Ek⟨Xv ⌢ r⟩}
+func verifyFaults(faults []block.Fault, verdicts []block.Verdict, offendingValidators []ed25519.PublicKey) error {
+	for _, fault := range faults {
+		// Find corresponding verdict
+		var allPositive bool
+		for _, verdict := range verdicts {
+			if verdict.ReportHash == fault.ReportHash {
+				positiveJudgments := block.CountPositiveJudgments(verdict.Judgements)
+				allPositive = positiveJudgments == len(verdict.Judgements)
+				break
+			}
+		}
+
+		// Fault vote should be opposite to verdict
+		// If verdict is all positive, fault vote should be false
+		// If verdict is all negative, fault vote should be true
+		if fault.IsValid == allPositive {
+			return errors.New("fault verdict wrong")
+		}
+
+		// Check that validator isn't already offending
+		if containsKey(offendingValidators, fault.ValidatorEd25519PublicKey) {
+			return errors.New("offender already reported")
+		}
+
+		// Verify signature
+		context := signatureContextValid
+		if !fault.IsValid {
+			context = signatureContextInvalid
+		}
+		message := append([]byte(context), fault.ReportHash[:]...)
+		if !ed25519.Verify(fault.ValidatorEd25519PublicKey, message, fault.Signature[:]) {
+			return errors.New("bad signature")
+		}
+	}
+	return nil
+}
+
+func contains(slice []crypto.Hash, item crypto.Hash) bool {
+	for _, hash := range slice {
+		if hash == item {
+			return true
+		}
+	}
+	return false
+}
+
+func containsKey(slice []ed25519.PublicKey, key ed25519.PublicKey) bool {
+	for _, k := range slice {
+		if bytes.Equal(k, key) {
+			return true
+		}
+	}
+	return false
 }
 
 // calculateNewCoreAssignments updates the core assignments based on new guarantees.
diff --git a/internal/statetransition/state_transition_test.go b/internal/statetransition/state_transition_test.go
index 1a69bb4..4c37e6f 100644
--- a/internal/statetransition/state_transition_test.go
+++ b/internal/statetransition/state_transition_test.go
@@ -93,98 +93,6 @@ func TestAddUniqueEdPubKey(t *testing.T) {
 	assert.Equal(t, key2, newSlice[1], "Last element should be the newly added key")
 }
 
-func TestProcessVerdictGood(t *testing.T) {
-	judgements := &state.Judgements{}
-	verdict := createVerdictWithJudgments(crypto.Hash{1}, common.ValidatorsSuperMajority)
-
-	processVerdict(judgements, verdict)
-
-	assert.Len(t, judgements.GoodWorkReports, 1, "Should have 1 good work report")
-	assert.Equal(t, crypto.Hash{1}, judgements.GoodWorkReports[0], "Good work report should have hash {1}")
-	assert.Empty(t, judgements.BadWorkReports, "Should have no bad work reports")
-	assert.Empty(t, judgements.WonkyWorkReports, "Should have no wonky work reports")
-}
-
-func TestProcessVerdictBad(t *testing.T) {
-	judgements := &state.Judgements{}
-	verdict := createVerdictWithJudgments(crypto.Hash{2}, 0)
-
-	processVerdict(judgements, verdict)
-
-	assert.Len(t, judgements.BadWorkReports, 1, "Should have 1 bad work report")
-	assert.Equal(t, crypto.Hash{2}, judgements.BadWorkReports[0], "Bad work report should have hash {2}")
-	assert.Empty(t, judgements.GoodWorkReports, "Should have no good work reports")
-	assert.Empty(t, judgements.WonkyWorkReports, "Should have no wonky work reports")
-}
-
-func TestProcessVerdictWonky(t *testing.T) {
-	judgements := &state.Judgements{}
-	verdict := createVerdictWithJudgments(crypto.Hash{3}, common.NumberOfValidators/3)
-
-	processVerdict(judgements, verdict)
-
-	assert.Len(t, judgements.WonkyWorkReports, 1, "Should have 1 wonky work report")
-	assert.Equal(t, crypto.Hash{3}, judgements.WonkyWorkReports[0], "Wonky work report should have hash {3}")
-	assert.Empty(t, judgements.GoodWorkReports, "Should have no good work reports")
-	assert.Empty(t, judgements.BadWorkReports, "Should have no bad work reports")
-}
-
-func TestProcessVerdictMultiple(t *testing.T) {
-	judgements := &state.Judgements{}
-
-	processVerdict(judgements, createVerdictWithJudgments(crypto.Hash{1}, common.ValidatorsSuperMajority))
-	processVerdict(judgements, createVerdictWithJudgments(crypto.Hash{2}, 0))
-	processVerdict(judgements, createVerdictWithJudgments(crypto.Hash{3}, common.NumberOfValidators/3))
-
-	assert.Len(t, judgements.GoodWorkReports, 1, "Should have 1 good work report")
-	assert.Len(t, judgements.BadWorkReports, 1, "Should have 1 bad work report")
-	assert.Len(t, judgements.WonkyWorkReports, 1, "Should have 1 wonky work report")
-}
-
-func TestProcessOffender(t *testing.T) {
-	judgements := &state.Judgements{}
-	key := ed25519.PublicKey([]byte{1, 2, 3})
-
-	processOffender(judgements, key)
-	assert.Len(t, judgements.OffendingValidators, 1, "Should have 1 offending validator")
-
-	processOffender(judgements, key) // Add same key again
-	assert.Len(t, judgements.OffendingValidators, 1, "Should still have 1 offending validator after adding duplicate")
-}
-
-func TestCalculateNewJudgements(t *testing.T) {
-	stateJudgements := state.Judgements{
-		BadWorkReports:  []crypto.Hash{{1}},
-		GoodWorkReports: []crypto.Hash{{2}},
-	}
-
-	var judgements [common.ValidatorsSuperMajority]block.Judgement
-	for i := 0; i < common.ValidatorsSuperMajority; i++ {
-		judgements[i] = block.Judgement{IsValid: true, ValidatorIndex: uint16(i)}
-	}
-
-	disputes := block.DisputeExtrinsic{
-		Verdicts: []block.Verdict{
-			{
-				ReportHash: crypto.Hash{3},
-				Judgements: judgements,
-			},
-		},
-		Culprits: []block.Culprit{
-			{ValidatorEd25519PublicKey: ed25519.PublicKey([]byte{1, 2, 3})},
-		},
-		Faults: []block.Fault{
-			{ValidatorEd25519PublicKey: ed25519.PublicKey([]byte{4, 5, 6})},
-		},
-	}
-
-	newJudgements := calculateNewJudgements(disputes, stateJudgements)
-
-	assert.Len(t, newJudgements.BadWorkReports, 1, "Should have 1 bad work report")
-	assert.Len(t, newJudgements.GoodWorkReports, 2, "Should have 2 good work reports")
-	assert.Len(t, newJudgements.OffendingValidators, 2, "Should have 2 offending validators")
-}
-
 func TestCalculateIntermediateBlockState(t *testing.T) {
 	header := block.Header{
 		PriorStateRoot: crypto.Hash{1, 2, 3},
@@ -916,11 +824,11 @@ func TestCalculateNewValidatorStatistics(t *testing.T) {
 	t.Run("new epoch transition", func(t *testing.T) {
 		// Initial state with some existing stats
 		initialStats := validator.ValidatorStatisticsState{
-			0: [1023]validator.ValidatorStatistics{
+			0: [common.NumberOfValidators]validator.ValidatorStatistics{
 				0: {NumOfBlocks: 5},
 				1: {NumOfTickets: 3},
 			},
-			1: [1023]validator.ValidatorStatistics{
+			1: [common.NumberOfValidators]validator.ValidatorStatistics{
 				0: {NumOfBlocks: 10},
 				1: {NumOfTickets: 6},
 			},
@@ -944,7 +852,7 @@ func TestCalculateNewValidatorStatistics(t *testing.T) {
 
 	t.Run("block author statistics", func(t *testing.T) {
 		initialStats := validator.ValidatorStatisticsState{
-			1: [1023]validator.ValidatorStatistics{}, // Current epoch stats
+			1: [common.NumberOfValidators]validator.ValidatorStatistics{}, // Current epoch stats
 		}
 
 		block := block.Block{
@@ -977,7 +885,7 @@ func TestCalculateNewValidatorStatistics(t *testing.T) {
 
 	t.Run("guarantees and assurances", func(t *testing.T) {
 		initialStats := validator.ValidatorStatisticsState{
-			1: [1023]validator.ValidatorStatistics{}, // Current epoch stats
+			1: [common.NumberOfValidators]validator.ValidatorStatistics{}, // Current epoch stats
 		}
 
 		block := block.Block{
@@ -1018,7 +926,7 @@ func TestCalculateNewValidatorStatistics(t *testing.T) {
 
 	t.Run("full block processing", func(t *testing.T) {
 		initialStats := validator.ValidatorStatisticsState{
-			1: [1023]validator.ValidatorStatistics{
+			1: [common.NumberOfValidators]validator.ValidatorStatistics{
 				1: {
 					NumOfBlocks:                 5,
 					NumOfTickets:                10,
diff --git a/tests/integration/disputes_test.go b/tests/integration/disputes_test.go
new file mode 100644
index 0000000..a204e4b
--- /dev/null
+++ b/tests/integration/disputes_test.go
@@ -0,0 +1,337 @@
+//go:build integration
+package integration
+
+import (
+	"crypto/ed25519"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/eigerco/strawberry/internal/block"
+	"github.com/eigerco/strawberry/internal/common"
+	"github.com/eigerco/strawberry/internal/crypto"
+	"github.com/eigerco/strawberry/internal/jamtime"
+	"github.com/eigerco/strawberry/internal/safrole"
+	"github.com/eigerco/strawberry/internal/state"
+	"github.com/eigerco/strawberry/internal/statetransition"
+	"github.com/stretchr/testify/require"
+)
+
+func stringToHex(s string) []byte {
+	if len(s) >= 2 && s[:2] == "0x" {
+		s = s[2:]
+	}
+	bytes, _ := hex.DecodeString(s)
+	return bytes
+}
+
+// Function to read the JSON file and map it to the structs
+func ReadJSONFile(filename string) (*JSONData, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open file: %v", err)
+	}
+	defer file.Close()
+
+	bytes, err := io.ReadAll(file)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read file: %v", err)
+	}
+
+	var data JSONData
+	if err := json.Unmarshal(bytes, &data); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal JSON: %v", err)
+	}
+
+	return &data, nil
+}
+
+// Define the structs to match the JSON structure
+type Judgement struct {
+	IsValid        bool   `json:"vote"`
+	ValidatorIndex int    `json:"index"`
+	Signature      string `json:"signature"`
+}
+
+type Verdict struct {
+	ReportHash string      `json:"target"`
+	EpochIndex int         `json:"age"`
+	Judgements []Judgement `json:"votes"`
+}
+
+type Culprit struct {
+	ReportHash                string `json:"target"`
+	ValidatorEd25519PublicKey string `json:"key"`
+	Signature                 string `json:"signature"`
+}
+
+type Fault struct {
+	ReportHash                string `json:"target"`
+	IsValid                   bool   `json:"vote"`
+	ValidatorEd25519PublicKey string `json:"key"`
+	Signature                 string `json:"signature"`
+}
+
+type Disputes struct {
+	Verdicts []Verdict `json:"verdicts"`
+	Culprits []Culprit `json:"culprits"`
+	Faults   []Fault   `json:"faults"`
+}
+
+type Psi struct {
+	Good      []string `json:"psi_g"`
+	Bad       []string `json:"psi_b"`
+	Wonky     []string `json:"psi_w"`
+	Offenders []string `json:"psi_o"`
+}
+
+type ReportResult struct {
+	ServiceID   int               `json:"service_id"`
+	CodeHash    string            `json:"code_hash"`
+	PayloadHash string            `json:"payload_hash"`
+	Gas         int               `json:"gas"`
+	Result      map[string]string `json:"result"`
+}
+
+type Context struct {
+	Anchor           string   `json:"anchor"`
+	StateRoot        string   `json:"state_root"`
+	BeefyRoot        string   `json:"beefy_root"`
+	LookupAnchor     string   `json:"lookup_anchor"`
+	LookupAnchorSlot int      `json:"lookup_anchor_slot"`
+	Prerequisites    []string `json:"prerequisites"`
+}
+
+type PackageSpec struct {
+	Hash         string `json:"hash"`
+	Length       int    `json:"length"`
+	ErasureRoot  string `json:"erasure_root"`
+	ExportsRoot  string `json:"exports_root"`
+	ExportsCount int    `json:"exports_count"`
+}
+
+type Report struct {
+	PackageSpec       PackageSpec    `json:"package_spec"`
+	Context           Context        `json:"context"`
+	CoreIndex         int            `json:"core_index"`
+	AuthorizerHash    string         `json:"authorizer_hash"`
+	AuthOutput        string         `json:"auth_output"`
+	SegmentRootLookup []string       `json:"segment_root_lookup"`
+	Results           []ReportResult `json:"results"`
+}
+
+type Rho struct {
+	Report  *Report `json:"report"`
+	Timeout int     `json:"timeout"`
+}
+
+type Kappa struct {
+	Bandersnatch string `json:"bandersnatch"`
+	Ed25519      string `json:"ed25519"`
+	BLS          string `json:"bls"`
+	Metadata     string `json:"metadata"`
+}
+
+type OutputOk struct {
+	OffendersMark []string `json:"offenders_mark"`
+}
+
+type Output struct {
+	Ok  OutputOk `json:"ok"`
+	Err string   `json:"err"`
+}
+
+type State struct {
+	Psi    Psi     `json:"psi"`
+	Rho    []Rho   `json:"rho"`
+	Tau    int     `json:"tau"`
+	Kappa  []Kappa `json:"kappa"`
+	Lambda []Kappa `json:"lambda"`
+}
+
+type Input struct {
+	Disputes Disputes `json:"disputes"`
+}
+
+type PostState struct {
+	Psi    Psi     `json:"psi"`
+	Rho    []Rho   `json:"rho"`
+	Tau    int     `json:"tau"`
+	Kappa  []Kappa `json:"kappa"`
+	Lambda []Kappa `json:"lambda"`
+}
+
+type JSONData struct {
+	Input     Input     `json:"input"`
+	PreState  State     `json:"pre_state"`
+	Output    Output    `json:"output"`
+	PostState PostState `json:"post_state"`
+}
+
+func mapPsi(psi Psi) state.Judgements {
+	mapHashes := func(hashes []string) []crypto.Hash {
+		mappedHashes := make([]crypto.Hash, len(hashes))
+		for i, hash := range hashes {
+			mappedHashes[i] = crypto.Hash(stringToHex(hash))
+		}
+		return mappedHashes
+	}
+	keys := make([]ed25519.PublicKey, 0)
+	for _, offender := range psi.Offenders {
+		keys = append(keys, ed25519.PublicKey(stringToHex(offender)))
+	}
+	return state.Judgements{
+		BadWorkReports:      mapHashes(psi.Bad),
+		GoodWorkReports:     mapHashes(psi.Good),
+		WonkyWorkReports:    mapHashes(psi.Wonky),
+		OffendingValidators: keys,
+	}
+}
+
+func mapKey(kappa Kappa) crypto.ValidatorKey {
+	return crypto.ValidatorKey{
+		Bandersnatch: crypto.BandersnatchPublicKey(stringToHex(kappa.Bandersnatch)),
+		Ed25519:      ed25519.PublicKey(stringToHex(kappa.Ed25519)),
+		Bls:          crypto.BlsKey(stringToHex(kappa.BLS)),
+		Metadata:     crypto.MetadataKey(stringToHex(kappa.Metadata)),
+	}
+}
+
+func mapJudgments(judgements []Judgement) [common.ValidatorsSuperMajority]block.Judgement {
+	var mappedJudgements [common.ValidatorsSuperMajority]block.Judgement
+	for i, judgement := range judgements {
+		mappedJudgements[i] = block.Judgement{
+			IsValid:        judgement.IsValid,
+			ValidatorIndex: uint16(judgement.ValidatorIndex),
+			Signature:      crypto.Ed25519Signature(stringToHex(judgement.Signature)),
+		}
+	}
+	return mappedJudgements
+}
+
+func mapVerdicts(verdicts []Verdict) []block.Verdict {
+	mappedVerdicts := make([]block.Verdict, len(verdicts))
+	for i, verdict := range verdicts {
+		mappedVerdicts[i] = block.Verdict{
+			ReportHash: crypto.Hash(stringToHex(verdict.ReportHash)),
+			EpochIndex: uint32(verdict.EpochIndex),
+			Judgements: mapJudgments(verdict.Judgements),
+		}
+	}
+	return mappedVerdicts
+}
+
+func mapCulprits(culprits []Culprit) []block.Culprit {
+	mappedCulprits := make([]block.Culprit, len(culprits))
+	for i, culprit := range culprits {
+		mappedCulprits[i] = block.Culprit{
+			ReportHash:                crypto.Hash(stringToHex(culprit.ReportHash)),
+			ValidatorEd25519PublicKey: ed25519.PublicKey(stringToHex(culprit.ValidatorEd25519PublicKey)),
+			Signature:                 crypto.Ed25519Signature(stringToHex(culprit.Signature)),
+		}
+	}
+	return mappedCulprits
+}
+
+func mapFaults(faults []Fault) []block.Fault {
+	mappedFaults := make([]block.Fault, len(faults))
+	for i, fault := range faults {
+		mappedFaults[i] = block.Fault{
+			ReportHash:                crypto.Hash(stringToHex(fault.ReportHash)),
+			IsValid:                   fault.IsValid,
+			ValidatorEd25519PublicKey: ed25519.PublicKey(stringToHex(fault.ValidatorEd25519PublicKey)),
+			Signature:                 crypto.Ed25519Signature(stringToHex(fault.Signature)),
+		}
+	}
+	return mappedFaults
+}
+
+func mapDisputes(disputes Disputes) block.DisputeExtrinsic {
+	return block.DisputeExtrinsic{
+		Verdicts: mapVerdicts(disputes.Verdicts),
+		Culprits: mapCulprits(disputes.Culprits),
+		Faults:   mapFaults(disputes.Faults),
+	}
+}
+
+func TestDisputes(t *testing.T) {
+	files, err := os.ReadDir("vectors/disputes/tiny")
+	require.NoError(t, err, "failed to read tiny directory")
+
+	for _, file := range files {
+		if !strings.HasSuffix(file.Name(), ".json") {
+			continue
+		}
+
+		t.Run(file.Name(), func(t *testing.T) {
+			filePath := fmt.Sprintf("vectors/disputes/tiny/%s", file.Name())
+			data, err := ReadJSONFile(filePath)
+			require.NoError(t, err, "failed to read JSON file: %s", filePath)
+
+			input := data.Input
+			disputes := mapDisputes(input.Disputes)
+			preState := state.State{}
+			kappa := safrole.ValidatorsData{}
+			pastJudgements := mapPsi(data.PreState.Psi)
+			for i, key := range data.PreState.Kappa {
+				kappa[i] = mapKey(key)
+			}
+			lambda := safrole.ValidatorsData{}
+			for i, key := range data.PreState.Lambda {
+				lambda[i] = mapKey(key)
+			}
+			preState.PastJudgements = pastJudgements
+			preState.ValidatorState.CurrentValidators = kappa
+			preState.ValidatorState.ArchivedValidators = lambda
+			preState.TimeslotIndex = jamtime.Timeslot(data.PreState.Tau)
+
+			postState := state.State{}
+			kappa = safrole.ValidatorsData{}
+			for i, key := range data.PostState.Kappa {
+				kappa[i] = mapKey(key)
+			}
+			lambda = safrole.ValidatorsData{}
+			for i, key := range data.PostState.Lambda {
+				lambda[i] = mapKey(key)
+			}
+			postState.PastJudgements = mapPsi(data.PostState.Psi)
+			postState.ValidatorState.CurrentValidators = kappa
+			postState.ValidatorState.ArchivedValidators = lambda
+			postState.TimeslotIndex = jamtime.Timeslot(data.PostState.Tau)
+
+			newJudgements, err := statetransition.CalculateNewJudgements(preState.TimeslotIndex, disputes, preState.PastJudgements, preState.ValidatorState)
+			if data.Output.Err != "" {
+				require.Error(t, err)
+				require.EqualError(t, err, strings.ReplaceAll(data.Output.Err, "_", " "))
+			} else {
+				require.NoError(t, err)
+			}
+
+			if len(data.Output.Ok.OffendersMark) > 0 {
+				offendersMark := make([]ed25519.PublicKey, len(data.Output.Ok.OffendersMark))
+				for i, offender := range data.Output.Ok.OffendersMark {
+					offendersMark[i] = ed25519.PublicKey(stringToHex(offender))
+				}
+				require.ElementsMatch(t, offendersMark, newJudgements.OffendingValidators)
+			}
+			preState.PastJudgements = newJudgements
+
+			for i, key := range preState.ValidatorState.CurrentValidators {
+				require.EqualValues(t, key.Bandersnatch, postState.ValidatorState.CurrentValidators[i].Bandersnatch, "Bandersnatch keys are not equal")
+				require.EqualValues(t, key.Ed25519, postState.ValidatorState.CurrentValidators[i].Ed25519, "Ed25519 keys are not equal")
+				require.EqualValues(t, key.Bls, postState.ValidatorState.CurrentValidators[i].Bls)
+				require.EqualValues(t, key.Metadata, postState.ValidatorState.CurrentValidators[i].Metadata)
+			}
+			require.ElementsMatch(t, preState.ValidatorState.CurrentValidators, postState.ValidatorState.CurrentValidators)
+			require.ElementsMatch(t, preState.PastJudgements.BadWorkReports, postState.PastJudgements.BadWorkReports, "Mismatch in BadWorkReports")
+			require.ElementsMatch(t, preState.PastJudgements.GoodWorkReports, postState.PastJudgements.GoodWorkReports, "Mismatch in GoodWorkReports")
+			require.ElementsMatch(t, preState.PastJudgements.WonkyWorkReports, postState.PastJudgements.WonkyWorkReports, "Mismatch in WonkyWorkReports")
+			require.ElementsMatch(t, preState.PastJudgements.OffendingValidators, postState.PastJudgements.OffendingValidators, "Mismatch in OffendingValidators")
+			require.Equal(t, preState.TimeslotIndex, postState.TimeslotIndex, "Mismatch in TimeslotIndex")
+		})
+	}
+}
diff --git a/tests/integration/vectors/disputes/disputes1.json b/tests/integration/vectors/disputes/disputes1.json
new file mode 100644
index 0000000..46c1f9e
--- /dev/null
+++ b/tests/integration/vectors/disputes/disputes1.json
@@ -0,0 +1,233 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
+                    "target": "0x0e5751c026e543b2e8ab2eb06099daa1d1e5df47778f7787faab45cdf12fe3a8",
+                    "age": 0,
+                    "votes": [
+                        {
+                            "vote": false,
+                            "index": 0,
+                            "signature": "0x647c04630e911a432f99e6c1108bcf4c06496754033b77c5eb8271a5d06a85e1884db0fb977e232e416643ccfaf4f334e99f3b8d9cdfc65a8e4ecbc9db284005"
+                        },
+                        {
+                            "vote": false,
+                            "index": 1,
+                            "signature": "0xb95288deca20fcb649a3515ece2f1d147f8c0f3acef20967cd05a7b770c96e2e0928a056af1aa233c45b0a154e31dae842a50ff48f249cc364af20f282db950a"
+                        },
+                        {
+                            "vote": false,
+                            "index": 2,
+                            "signature": "0x2f8476e2c06dec1fd24130363f922f5419d91cd250d0d9448e8db471e08377a8ee927c8ca9c45ff47796cf0dfb35e4aff4fee96cae8dbe40fbd48d1cd59c7f0c"
+                        },
+                        {
+                            "vote": false,
+                            "index": 3,
+                            "signature": "0xdf20eab8438b43d774ac84d4225607cdd4159ee495991c89c9dc302e7d826b53e23b1f266a2dcf915dee277a0bfa0b93c957504503213c3f57a4c08b5ce07f0b"
+                        },
+                        {
+                            "vote": false,
+                            "index": 4,
+                            "signature": "0xdf20eab8438b43d774ac84d4225607cdd4159ee495991c89c9dc302e7d826b53e23b1f266a2dcf915dee277a0bfa0b93c957504503213c3f57a4c08b5ce07f0b"
+                        }
+                    ]
+                }
+            ],
+            "culprits": [
+                {
+                    "target": "0x0e5751c026e543b2e8ab2eb06099daa1d1e5df47778f7787faab45cdf12fe3a8",
+                    "key": "0x22351e22105a19aabb42589162ad7f1ea0df1c25cebf0e4a9fcd261301274862",
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+    },
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+        "psi": {
+            "psi_g": [],
+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": []
+        },
+        "rho": [
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+            null
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+        "tau": 0,
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+    },
+    "output": {
+        "err": "bad_signature"
+    },
+    "post_state": {
+        "psi": {
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+            "psi_b": [],
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+}
diff --git a/tests/integration/vectors/disputes/disputes2.json b/tests/integration/vectors/disputes/disputes2.json
new file mode 100644
index 0000000..90fd98c
--- /dev/null
+++ b/tests/integration/vectors/disputes/disputes2.json
@@ -0,0 +1,222 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
+                    "target": "0x11da6d1f761ddf9bdb4c9d6e5303ebd41f61858d0a5647a1a7bfe089bf921be9",
+                    "age": 0,
+                    "votes": [
+                        {
+                            "vote": true,
+                            "index": 0,
+                            "signature": "0x0b1e29dbda5e3bba5dde21c81a8178b115ebf0cf5920fe1a38e897ecadd91718e34bf01c9fc7fdd0df31d83020231b6e8338c8dc204b618cbde16a03cb269d05"
+                        },
+                        {
+                            "vote": true,
+                            "index": 1,
+                            "signature": "0x0d44746706e09ff6b6f2929e736c2f868a4d17939af6d37ca7d3c7f6d4914bd095a6fd4ff48c320b673e2de92bfdb5ed9f5c0c40749816ab4171a2272386fc05"
+                        },
+                        {
+                            "vote": true,
+                            "index": 2,
+                            "signature": "0x0d5d39f2239b775b22aff53b74a0d708a9b9363ed5017170f0abebc8ffd97fc1cc3cf597c578b555ad5abab26e09ecda727c2909feae99587c6354b86e4cc50c"
+                        },
+                        {
+                            "vote": true,
+                            "index": 3,
+                            "signature": "0x701d277fa78993b343a5d4367f1c2a2fb7ddb77f0246bf9028196feccbb7c0f2bd994966b3e9b1e51ff5dd63d8aa5e2331432b9cca4a125552c4700d51814a04"
+                        },
+                        {
+                            "vote": true,
+                            "index": 4,
+                            "signature": "0x08d96d2e49546931dc3de989a69aa0ae3547d67a038bdaa84f7e549da8318d48aab72b4b30ecc0c588696305fce3e2c4657f409463f6a05c52bf641f2684460f"
+                        }
+                    ]
+                }
+            ],
+            "culprits": [],
+            "faults": []
+        }
+    },
+    "pre_state": {
+        "psi": {
+            "psi_g": [],
+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": []
+        },
+        "rho": [
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+            null
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+        "tau": 0,
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+    "output": {
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+    "post_state": {
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+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": []
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diff --git a/tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-1.json b/tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-1.json
new file mode 100644
index 0000000..46c1f9e
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-1.json
@@ -0,0 +1,233 @@
+{
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-2.json b/tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-2.json
new file mode 100644
index 0000000..cbc00a2
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_bad_signatures-2.json
@@ -0,0 +1,243 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                        },
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+                }
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diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-1.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-1.json
new file mode 100644
index 0000000..26a4d65
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-1.json
@@ -0,0 +1,222 @@
+{
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+                        },
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+                        },
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-2.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-2.json
new file mode 100644
index 0000000..a782b03
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-2.json
@@ -0,0 +1,228 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
+                    "target": "0x11da6d1f761ddf9bdb4c9d6e5303ebd41f61858d0a5647a1a7bfe089bf921be9",
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+                    "votes": [
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+                        },
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+                }
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+            "psi_b": [],
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+            "psi_o": []
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+            null
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+        "lambda": [
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+                "ed25519": "0xe68e0cf7f26c59f963b5846202d2327cc8bc0c4eff8cb9abd4012f9a71decf00",
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+    "output": {
+        "err": "not_enough_culprits"
+    },
+    "post_state": {
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+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": []
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+        "rho": [
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-3.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-3.json
new file mode 100644
index 0000000..6c04de2
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-3.json
@@ -0,0 +1,233 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                    "votes": [
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+                            "index": 0,
+                            "signature": "0x826a4bbe7ee3400ffe0f64bdd87ae65aa50d98f48ad6a60da927636cd430ae5d3914d3bc6b87c47c94a9cc5bef84bf30be5534e5c649fc2cd4434918a37a2301"
+                        },
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+        "lambda": [
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+    "output": {
+        "err": "culprits_not_sorted_unique"
+    },
+    "post_state": {
+        "psi": {
+            "psi_g": [],
+            "psi_b": [],
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-4.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-4.json
new file mode 100644
index 0000000..a8ab1e8
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-4.json
@@ -0,0 +1,243 @@
+{
+    "input": {
+        "disputes": {
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+                        },
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diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-5.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-5.json
new file mode 100644
index 0000000..9ecf0c3
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-5.json
@@ -0,0 +1,237 @@
+{
+    "input": {
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-6.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-6.json
new file mode 100644
index 0000000..038497e
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-6.json
@@ -0,0 +1,237 @@
+{
+    "input": {
+        "disputes": {
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+            {
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+                "ed25519": "0x3b6a27bcceb6a42d62a3a8d02a6f0d73653215771de243a63ac048a18b59da29",
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+            {
+                "bandersnatch": "0x48e5fcdce10e0b64ec4eebd0d9211c7bac2f27ce54bca6f7776ff6fee86ab3e3",
+                "ed25519": "0x5c7f34a4bd4f2d04076a8c6f9060a0c8d2c6bdd082ceb3eda7df381cb260faff",
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+        ]
+    },
+    "output": {
+        "err": "offender_already_reported"
+    },
+    "post_state": {
+        "psi": {
+            "psi_g": [],
+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": [
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+        "rho": [
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+            null
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+        "tau": 0,
+        "kappa": [
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+            {
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_culprits-7.json b/tests/integration/vectors/disputes/tiny/progress_with_culprits-7.json
new file mode 100644
index 0000000..d1b5295
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_culprits-7.json
@@ -0,0 +1,238 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
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+                    "votes": [
+                        {
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+                            "index": 0,
+                            "signature": "0x826a4bbe7ee3400ffe0f64bdd87ae65aa50d98f48ad6a60da927636cd430ae5d3914d3bc6b87c47c94a9cc5bef84bf30be5534e5c649fc2cd4434918a37a2301"
+                        },
+                        {
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+                            "index": 1,
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+                        },
+                        {
+                            "vote": false,
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+                            "signature": "0x960493c94e625e296d48756050b0f92217ecc4059f369597defccae78d92b0e6628faf6a216f44f95bfc6b2f5f5a192c8c163ceb8b147de21373a658c9f34706"
+                        },
+                        {
+                            "vote": false,
+                            "index": 3,
+                            "signature": "0x2e40c056ccbe227ae2e10c1f07800b7981fba2d9ca80eaec293251b9287e2ed55dcc177cadb1a51929fa0caffe9fb1833aa7566dd4be09ac28eb215428a4a509"
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+                {
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+                {
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+        "psi": {
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+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": []
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-1.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-1.json
new file mode 100644
index 0000000..90fd98c
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-1.json
@@ -0,0 +1,222 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                        },
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+                        },
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+            "psi_o": []
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+        "rho": [
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+    "output": {
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-2.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-2.json
new file mode 100644
index 0000000..1685f81
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-2.json
@@ -0,0 +1,237 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                    "age": 0,
+                    "votes": [
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+                        },
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-3.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-3.json
new file mode 100644
index 0000000..a2b021b
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-3.json
@@ -0,0 +1,235 @@
+{
+    "input": {
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+    "output": {
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-4.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-4.json
new file mode 100644
index 0000000..f9b1c3f
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-4.json
@@ -0,0 +1,245 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                    "age": 0,
+                    "votes": [
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+                            "vote": true,
+                            "index": 0,
+                            "signature": "0x0b1e29dbda5e3bba5dde21c81a8178b115ebf0cf5920fe1a38e897ecadd91718e34bf01c9fc7fdd0df31d83020231b6e8338c8dc204b618cbde16a03cb269d05"
+                        },
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+                        },
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+                        },
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+                        },
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-5.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-5.json
new file mode 100644
index 0000000..3a8e384
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-5.json
@@ -0,0 +1,233 @@
+{
+    "input": {
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+                    "votes": [
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+                        },
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diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-6.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-6.json
new file mode 100644
index 0000000..f7646f0
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-6.json
@@ -0,0 +1,233 @@
+{
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_faults-7.json b/tests/integration/vectors/disputes/tiny/progress_with_faults-7.json
new file mode 100644
index 0000000..1119aa9
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_faults-7.json
@@ -0,0 +1,235 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                    "votes": [
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+                        },
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+                        },
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+                        },
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diff --git a/tests/integration/vectors/disputes/tiny/progress_with_no_verdicts-1.json b/tests/integration/vectors/disputes/tiny/progress_with_no_verdicts-1.json
new file mode 100644
index 0000000..8ef9d60
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_no_verdicts-1.json
@@ -0,0 +1,192 @@
+{
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+            "culprits": [],
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diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-1.json b/tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-1.json
new file mode 100644
index 0000000..4b6a9be
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-1.json
@@ -0,0 +1,243 @@
+{
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-2.json b/tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-2.json
new file mode 100644
index 0000000..2997414
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdict_signatures_from_previous_set-2.json
@@ -0,0 +1,233 @@
+{
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+    "post_state": {
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+            "psi_b": [],
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdicts-1.json b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-1.json
new file mode 100644
index 0000000..1799457
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-1.json
@@ -0,0 +1,229 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
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+                    "target": "0x11da6d1f761ddf9bdb4c9d6e5303ebd41f61858d0a5647a1a7bfe089bf921be9",
+                    "age": 0,
+                    "votes": [
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+                            "index": 0,
+                            "signature": "0x0b1e29dbda5e3bba5dde21c81a8178b115ebf0cf5920fe1a38e897ecadd91718e34bf01c9fc7fdd0df31d83020231b6e8338c8dc204b618cbde16a03cb269d05"
+                        },
+                        {
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+                        },
+                        {
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+                            "index": 1,
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+                        },
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+                            "index": 3,
+                            "signature": "0x701d277fa78993b343a5d4367f1c2a2fb7ddb77f0246bf9028196feccbb7c0f2bd994966b3e9b1e51ff5dd63d8aa5e2331432b9cca4a125552c4700d51814a04"
+                        },
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+                    "key": "0x3b6a27bcceb6a42d62a3a8d02a6f0d73653215771de243a63ac048a18b59da29",
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+                }
+            ]
+        }
+    },
+    "pre_state": {
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+            "psi_b": [],
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+            "psi_o": []
+        },
+        "rho": [
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdicts-2.json b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-2.json
new file mode 100644
index 0000000..2ee143a
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-2.json
@@ -0,0 +1,229 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
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+                        {
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+    },
+    "pre_state": {
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+            "psi_b": [],
+            "psi_w": [],
+            "psi_o": []
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+        "rho": [
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+        ]
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+    "output": {
+        "err": "judgements_not_sorted_unique"
+    },
+    "post_state": {
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+            "psi_b": [],
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+        },
+        "rho": [
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+            }
+        ]
+    }
+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdicts-3.json b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-3.json
new file mode 100644
index 0000000..a37db56
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-3.json
@@ -0,0 +1,271 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
+                    "target": "0x7b0aa1735e5ba58d3236316c671fe4f00ed366ee72417c9ed02a53a8019e85b8",
+                    "age": 0,
+                    "votes": [
+                        {
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+                            "index": 0,
+                            "signature": "0xd76bba06ffb8042bedce3f598e22423660e64f2108566cbd548f6d2c42b1a39607a214bddfa7ccccf83fe993728a58393c64283b8a9ab8f3dff49cbc3cc2350e"
+                        },
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+                        },
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+                        },
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+                        }
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+                        },
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+                }
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+            "psi_o": []
+        },
+        "rho": [
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+        "err": "verdicts_not_sorted_unique"
+    },
+    "post_state": {
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdicts-4.json b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-4.json
new file mode 100644
index 0000000..306d3b5
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-4.json
@@ -0,0 +1,285 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
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+                    "votes": [
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+                            "signature": "0x0b1e29dbda5e3bba5dde21c81a8178b115ebf0cf5920fe1a38e897ecadd91718e34bf01c9fc7fdd0df31d83020231b6e8338c8dc204b618cbde16a03cb269d05"
+                        },
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+                        },
+                        {
+                            "vote": true,
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+                        },
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+                        },
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+                        }
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+                        },
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+            "psi_o": []
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+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdicts-5.json b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-5.json
new file mode 100644
index 0000000..8113ad0
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-5.json
@@ -0,0 +1,249 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
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+                    "age": 0,
+                    "votes": [
+                        {
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+                            "index": 0,
+                            "signature": "0xb8f07ab05cbe7753682b9ca32d7ce5e28e26123ee8682ae332c5cabfcb7bda1d32588ec96a5af94469347d4b4f12ba992b220edb06f78f199bd787692b44e708"
+                        },
+                        {
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+                        },
+                        {
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+                        },
+                        {
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+                            "index": 3,
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+                        },
+                        {
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+                },
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+                }
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+                "0x3b6a27bcceb6a42d62a3a8d02a6f0d73653215771de243a63ac048a18b59da29",
+                "0xe68e0cf7f26c59f963b5846202d2327cc8bc0c4eff8cb9abd4012f9a71decf00"
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+                "ed25519": "0xb3e0e096b02e2ec98a3441410aeddd78c95e27a0da6f411a09c631c0f2bea6e9",
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+        "lambda": [
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+    "output": {
+        "err": "bad_vote_split"
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+        "lambda": [
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+                "ed25519": "0xe68e0cf7f26c59f963b5846202d2327cc8bc0c4eff8cb9abd4012f9a71decf00",
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+            },
+            {
+                "bandersnatch": "0x7f6190116d118d643a98878e294ccf62b509e214299931aad8ff9764181a4e33",
+                "ed25519": "0xb3e0e096b02e2ec98a3441410aeddd78c95e27a0da6f411a09c631c0f2bea6e9",
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+            }
+        ]
+    }
+}
diff --git a/tests/integration/vectors/disputes/tiny/progress_with_verdicts-6.json b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-6.json
new file mode 100644
index 0000000..c226b6d
--- /dev/null
+++ b/tests/integration/vectors/disputes/tiny/progress_with_verdicts-6.json
@@ -0,0 +1,242 @@
+{
+    "input": {
+        "disputes": {
+            "verdicts": [
+                {
+                    "target": "0xe12c22d4f162d9a012c9319233da5d3e923cc5e1029b8f90e47249c9ab256b35",
+                    "age": 0,
+                    "votes": [
+                        {
+                            "vote": true,
+                            "index": 0,
+                            "signature": "0x98b07efd76fec53dbfb3ac4cb521c06945a852bbb12c74158cb660f31dcf09cbc297815f0baf7a3c982f3a2bd42242bc1f60230f374106627c66b0bfae0c3400"
+                        },
+                        {
+                            "vote": true,
+                            "index": 1,
+                            "signature": "0xce37e99cce4a9dd4621970a54efb78e69694eea0f9a9ed24dde41b481b0a5984d8705f19beb18396eda280af75e43f45726290ed59dac27f53ba5514c70f7b07"
+                        },
+                        {
+                            "vote": false,
+                            "index": 2,
+                            "signature": "0x9ae03b97c94551c2416494df1e2de19d8f16e029cd93e50c115ed15b51c8a2a23b6e397380597feb0ea5b5f4835e4f73f2e0276aa3b505b484eba6146655300e"
+                        },
+                        {
+                            "vote": false,
+                            "index": 3,
+                            "signature": "0x46ae920062dd4722b67c535d9d30abc493547e553044d9f2ce709910c6eaae15a21cf0da0d0c1d650022c0302800bccd2bd01afabbfebbe5a07ff79878e0020e"
+                        },
+                        {
+                            "vote": false,
+                            "index": 4,
+                            "signature": "0x5b5d5ba6b7e93827c04d1a27ff9542dfac63c80c5377446e0bb3afb919103383a418ac70b7049ff94f10e1589a1da9018a9a983f466aa1d8143f1eb5e11ee30d"
+                        }
+                    ]
+                }
+            ],
+            "culprits": [],
+            "faults": []
+        }
+    },
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