feat: enable multiple confirmation count values in chain params (#3461)

* add fine-grained confirmation to chain params; add migration script

* add changelog entry

* fix unit test

* rename Confirmation as ConfirmationParams; remove 0 check on safe inbound, outbound count

* leave ConfirmationParams as empty in mock chain params, we don't check 0 count any more

* mark chain params ConfirmationCount as deprecated

* make changelog entry explicit; add proto message comment; improve migrate script and unit test

* validate all chain params during migration; return error if validation fails

* make ConfirmationParams nullable to avoid upgrade test failure; adjust checks and tests accordingly

changelog.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Features
+
+* [3461](https://github.com/zeta-chain/node/pull/3461) - add new 'ConfirmationParams' field to chain params to enable multiple confirmation count values, deprecating `confirmation_count`
+
 ### Tests
 
 * [3430](https://github.com/zeta-chain/node/pull/3430) - add simulation test for MsgWithDrawEmission

docs/openapi/openapi.swagger.yaml

@@ -59767,6 +59767,7 @@ definitions:
       confirmation_count:
         type: string
         format: uint64
+        title: 'Deprecated(v28): use confirmation_params instead'
       gas_price_ticker:
         type: string
         format: uint64
@@ -59799,6 +59800,9 @@ definitions:
         type: boolean
       gateway_address:
         type: string
+      confirmation_params:
+        $ref: '#/definitions/observerConfirmationParams'
+        title: Advanced confirmation parameters for chain to support fast observation
   observerChainParamsList:
     type: object
     properties:
@@ -59807,6 +59811,33 @@ definitions:
         items:
           type: object
           $ref: '#/definitions/observerChainParams'
+  observerConfirmationParams:
+    type: object
+    properties:
+      safe_inbound_count:
+        type: string
+        format: uint64
+        description: |-
+          This is the safe number of confirmations to wait before an inbound is
+          considered finalized.
+      fast_inbound_count:
+        type: string
+        format: uint64
+        description: |-
+          This is the number of confirmations for fast inbound observation, which is
+          shorter than safe_inbound_count.
+      safe_outbound_count:
+        type: string
+        format: uint64
+        description: |-
+          This is the safe number of confirmations to wait before an outbound is
+          considered finalized.
+      fast_outbound_count:
+        type: string
+        format: uint64
+        description: |-
+          This is the number of confirmations for fast outbound observation, which is
+          shorter than safe_outbound_count.
   observerCrosschainFlags:
     type: object
     properties:

proto/zetachain/zetacore/observer/confirmation_params.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+package zetachain.zetacore.observer;
+
+option go_package = "github.com/zeta-chain/node/x/observer/types";
+
+message ConfirmationParams {
+  // This is the safe number of confirmations to wait before an inbound is
+  // considered finalized.
+  uint64 safe_inbound_count = 1;
+
+  // This is the number of confirmations for fast inbound observation, which is
+  // shorter than safe_inbound_count.
+  uint64 fast_inbound_count = 2;
+
+  // This is the safe number of confirmations to wait before an outbound is
+  // considered finalized.
+  uint64 safe_outbound_count = 3;
+
+  // This is the number of confirmations for fast outbound observation, which is
+  // shorter than safe_outbound_count.
+  uint64 fast_outbound_count = 4;
+}

proto/zetachain/zetacore/observer/params.proto

@@ -2,15 +2,16 @@ syntax = "proto3";
 package zetachain.zetacore.observer;
 
 import "gogoproto/gogo.proto";
-import "zetachain/zetacore/observer/observer.proto";
+import "zetachain/zetacore/observer/confirmation_params.proto";
 
 option go_package = "github.com/zeta-chain/node/x/observer/types";
 
 message ChainParamsList { repeated ChainParams chain_params = 1; }
 
 message ChainParams {
   int64 chain_id = 11;
-  uint64 confirmation_count = 1;
+  // Deprecated(v28): use confirmation_params instead
+  uint64 confirmation_count = 1 [ deprecated = true ];
   uint64 gas_price_ticker = 2;
   uint64 inbound_ticker = 3;
   uint64 outbound_ticker = 4;
@@ -30,6 +31,9 @@ message ChainParams {
   ];
   bool is_supported = 16;
   string gateway_address = 17;
+
+  // Advanced confirmation parameters for chain to support fast observation
+  ConfirmationParams confirmation_params = 18;
 }
 
 // Deprecated(v17)

testutil/sample/observer.go

@@ -97,6 +97,8 @@ func ChainParams(chainID int64) *types.ChainParams {
 		return nil
 	}
 
+	confirmationParams := ConfirmationParams(r)
+
 	return &types.ChainParams{
 		ChainId:           chainID,
 		ConfirmationCount: r.Uint64(),
@@ -113,6 +115,8 @@ func ChainParams(chainID int64) *types.ChainParams {
 		BallotThreshold:             fiftyPercent,
 		MinObserverDelegation:       sdkmath.LegacyNewDec(r.Int63()),
 		IsSupported:                 false,
+		GatewayAddress:              EthAddress().String(),
+		ConfirmationParams:          &confirmationParams,
 	}
 }
 
@@ -337,3 +341,15 @@ func OperationalFlags() types.OperationalFlags {
 		SignerBlockTimeOffset: ptr.Ptr(time.Second),
 	}
 }
+
+func ConfirmationParams(r *rand.Rand) types.ConfirmationParams {
+	randInboundCount := Uint64InRangeFromRand(r, 1, 200)
+	randOutboundCount := Uint64InRangeFromRand(r, 1, 200)
+
+	return types.ConfirmationParams{
+		SafeInboundCount:  randInboundCount,
+		FastInboundCount:  Uint64InRange(1, randInboundCount),
+		SafeOutboundCount: randOutboundCount,
+		FastOutboundCount: Uint64InRange(1, randOutboundCount),
+	}
+}

typescript/zetachain/zetacore/observer/confirmation_params_pb.d.ts

@@ -0,0 +1,59 @@
+// @generated by protoc-gen-es v1.3.0 with parameter "target=dts"
+// @generated from file zetachain/zetacore/observer/confirmation_params.proto (package zetachain.zetacore.observer, syntax proto3)
+/* eslint-disable */
+// @ts-nocheck
+
+import type { BinaryReadOptions, FieldList, JsonReadOptions, JsonValue, PartialMessage, PlainMessage } from "@bufbuild/protobuf";
+import { Message, proto3 } from "@bufbuild/protobuf";
+
+/**
+ * @generated from message zetachain.zetacore.observer.ConfirmationParams
+ */
+export declare class ConfirmationParams extends Message<ConfirmationParams> {
+  /**
+   * This is the safe number of confirmations to wait before an inbound is
+   * considered finalized.
+   *
+   * @generated from field: uint64 safe_inbound_count = 1;
+   */
+  safeInboundCount: bigint;
+
+  /**
+   * This is the number of confirmations for fast inbound observation, which is
+   * shorter than safe_inbound_count.
+   *
+   * @generated from field: uint64 fast_inbound_count = 2;
+   */
+  fastInboundCount: bigint;
+
+  /**
+   * This is the safe number of confirmations to wait before an outbound is
+   * considered finalized.
+   *
+   * @generated from field: uint64 safe_outbound_count = 3;
+   */
+  safeOutboundCount: bigint;
+
+  /**
+   * This is the number of confirmations for fast outbound observation, which is
+   * shorter than safe_outbound_count.
+   *
+   * @generated from field: uint64 fast_outbound_count = 4;
+   */
+  fastOutboundCount: bigint;
+
+  constructor(data?: PartialMessage<ConfirmationParams>);
+
+  static readonly runtime: typeof proto3;
+  static readonly typeName = "zetachain.zetacore.observer.ConfirmationParams";
+  static readonly fields: FieldList;
+
+  static fromBinary(bytes: Uint8Array, options?: Partial<BinaryReadOptions>): ConfirmationParams;
+
+  static fromJson(jsonValue: JsonValue, options?: Partial<JsonReadOptions>): ConfirmationParams;
+
+  static fromJsonString(jsonString: string, options?: Partial<JsonReadOptions>): ConfirmationParams;
+
+  static equals(a: ConfirmationParams | PlainMessage<ConfirmationParams> | undefined, b: ConfirmationParams | PlainMessage<ConfirmationParams> | undefined): boolean;
+}
+

typescript/zetachain/zetacore/observer/index.d.ts

@@ -1,6 +1,7 @@
 export * from "./ballot_pb";
 export * from "./blame_pb";
 export * from "./chain_nonces_pb";
+export * from "./confirmation_params_pb";
 export * from "./crosschain_flags_pb";
 export * from "./events_pb";
 export * from "./genesis_pb";

typescript/zetachain/zetacore/observer/params_pb.d.ts

@@ -5,6 +5,7 @@
 
 import type { BinaryReadOptions, FieldList, JsonReadOptions, JsonValue, PartialMessage, PlainMessage } from "@bufbuild/protobuf";
 import { Message, proto3 } from "@bufbuild/protobuf";
+import type { ConfirmationParams } from "./confirmation_params_pb.js";
 
 /**
  * @generated from message zetachain.zetacore.observer.ChainParamsList
@@ -40,7 +41,10 @@ export declare class ChainParams extends Message<ChainParams> {
   chainId: bigint;
 
   /**
-   * @generated from field: uint64 confirmation_count = 1;
+   * Deprecated(v28): use confirmation_params instead
+   *
+   * @generated from field: uint64 confirmation_count = 1 [deprecated = true];
+   * @deprecated
    */
   confirmationCount: bigint;
 
@@ -109,6 +113,13 @@ export declare class ChainParams extends Message<ChainParams> {
    */
   gatewayAddress: string;
 
+  /**
+   * Advanced confirmation parameters for chain to support fast observation
+   *
+   * @generated from field: zetachain.zetacore.observer.ConfirmationParams confirmation_params = 18;
+   */
+  confirmationParams?: ConfirmationParams;
+
   constructor(data?: PartialMessage<ChainParams>);
 
   static readonly runtime: typeof proto3;

x/observer/keeper/migrator.go

@@ -3,6 +3,7 @@ package keeper
 import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
+	v10 "github.com/zeta-chain/node/x/observer/migrations/v10"
 	v8 "github.com/zeta-chain/node/x/observer/migrations/v8"
 	v9 "github.com/zeta-chain/node/x/observer/migrations/v9"
 )
@@ -55,3 +56,8 @@ func (m Migrator) Migrate7to8(ctx sdk.Context) error {
 func (m Migrator) Migrate8to9(ctx sdk.Context) error {
 	return v9.MigrateStore(ctx, m.observerKeeper)
 }
+
+// Migrate9to10 migrates the store from consensus version 9 to 10
+func (m Migrator) Migrate9to10(ctx sdk.Context) error {
+	return v10.MigrateStore(ctx, m.observerKeeper)
+}

x/observer/migrations/v10/migrate.go

@@ -0,0 +1,48 @@
+package v10
+
+import (
+	errorsmod "cosmossdk.io/errors"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	"github.com/zeta-chain/node/x/observer/types"
+)
+
+type observerKeeper interface {
+	GetChainParamsList(ctx sdk.Context) (val types.ChainParamsList, found bool)
+	SetChainParamsList(ctx sdk.Context, chainParams types.ChainParamsList)
+}
+
+// MigrateStore migrates the x/observer module state from the consensus version 9 to version 10.
+// The migration sets existing 'confirmation_count' as default value for newly added fields:
+//   - 'safe_inbound_count'
+//   - 'fast_inbound_count'
+//   - 'safe_outbound_count'
+//   - 'fast_outbound_count'
+func MigrateStore(ctx sdk.Context, observerKeeper observerKeeper) error {
+	allChainParams, found := observerKeeper.GetChainParamsList(ctx)
+	if !found {
+		return errorsmod.Wrap(types.ErrChainParamsNotFound, "failed to get chain params")
+	}
+
+	// set new fields to the same value as 'confirmation_count'
+	for _, chainParams := range allChainParams.ChainParams {
+		if chainParams != nil {
+			chainParams.ConfirmationParams = &types.ConfirmationParams{
+				SafeInboundCount:  chainParams.ConfirmationCount,
+				FastInboundCount:  chainParams.ConfirmationCount,
+				SafeOutboundCount: chainParams.ConfirmationCount,
+				FastOutboundCount: chainParams.ConfirmationCount,
+			}
+		}
+	}
+
+	// validate the updated chain params list
+	if err := allChainParams.Validate(); err != nil {
+		return errorsmod.Wrap(types.ErrInvalidChainParams, err.Error())
+	}
+
+	// set the updated chain params list
+	observerKeeper.SetChainParamsList(ctx, allChainParams)
+
+	return nil
+}