From c3773476ed2513f79c7f77484eafddda741a2e52 Mon Sep 17 00:00:00 2001
From: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>
Date: Wed, 26 Apr 2023 16:21:56 -0400
Subject: [PATCH] feat: prep POB with ABCI++ 2.0 Vote Ext Types (#94)

---
 abci/types.go | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 abci/types.go

diff --git a/abci/types.go b/abci/types.go
new file mode 100644
index 0000000..a9f18bb
--- /dev/null
+++ b/abci/types.go
@@ -0,0 +1,58 @@
+/*
+NOTE: These types are TEMPORARY and will be removed once the Cosmos SDK v0.38
+alpha/RC tag is released. These types are simply used to prototype and develop
+against.
+*/
+//nolint
+package abci
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+const (
+	ResponseVerifyVoteExtension_UNKNOWN ResponseVerifyVoteExtension_VerifyStatus = 0
+	ResponseVerifyVoteExtension_ACCEPT  ResponseVerifyVoteExtension_VerifyStatus = 1
+	// Rejecting the vote extension will reject the entire precommit by the sender.
+	// Incorrectly implementing this thus has liveness implications as it may affect
+	// CometBFT's ability to receive 2/3+ valid votes to finalize the block.
+	// Honest nodes should never be rejected.
+	ResponseVerifyVoteExtension_REJECT ResponseVerifyVoteExtension_VerifyStatus = 2
+)
+
+type (
+	RequestExtendVote struct {
+		// the hash of the block  that this vote may be referring to
+		Hash []byte `protobuf:"bytes,1,opt,name=hash,proto3" json:"hash,omitempty"`
+		// the height of the extended vote
+		Height int64 `protobuf:"varint,2,opt,name=height,proto3" json:"height,omitempty"`
+	}
+
+	ResponseExtendVote struct {
+		VoteExtension []byte `protobuf:"bytes,1,opt,name=vote_extension,json=voteExtension,proto3" json:"vote_extension,omitempty"`
+	}
+
+	RequestVerifyVoteExtension struct {
+		// the hash of the block that this received vote corresponds to
+		Hash []byte `protobuf:"bytes,1,opt,name=hash,proto3" json:"hash,omitempty"`
+		// the validator that signed the vote extension
+		ValidatorAddress []byte `protobuf:"bytes,2,opt,name=validator_address,json=validatorAddress,proto3" json:"validator_address,omitempty"`
+		Height           int64  `protobuf:"varint,3,opt,name=height,proto3" json:"height,omitempty"`
+		VoteExtension    []byte `protobuf:"bytes,4,opt,name=vote_extension,json=voteExtension,proto3" json:"vote_extension,omitempty"`
+	}
+
+	ResponseVerifyVoteExtension_VerifyStatus int32
+
+	ResponseVerifyVoteExtension struct {
+		Status ResponseVerifyVoteExtension_VerifyStatus `protobuf:"varint,1,opt,name=status,proto3,enum=tendermint.abci.ResponseVerifyVoteExtension_VerifyStatus" json:"status,omitempty"`
+	}
+)
+
+type (
+	// ExtendVoteHandler defines a function type alias for extending a pre-commit vote.
+	ExtendVoteHandler func(sdk.Context, *RequestExtendVote) (*ResponseExtendVote, error)
+
+	// VerifyVoteExtensionHandler defines a function type alias for verifying a
+	// pre-commit vote extension.
+	VerifyVoteExtensionHandler func(sdk.Context, *RequestVerifyVoteExtension) (*ResponseVerifyVoteExtension, error)
+)