---
title: "ChannelCloseConfirm defines a rpc handler method for MsgChannelCloseConfirm."
method: POST
path: "/ibc.core.channel.v1.Msg/ChannelCloseConfirm"
tags: ["Msg"]
---

# ChannelCloseConfirm defines a rpc handler method for MsgChannelCloseConfirm.

`POST /ibc.core.channel.v1.Msg/ChannelCloseConfirm`

## Request body

- IbcCoreChannelV1MsgChannelCloseConfirm — MsgChannelCloseConfirm defines a msg sent by a Relayer to Chain B to acknowledge the change of channel state to CLOSED on Chain A.
  - `channel_id` string
  - `counterparty_upgrade_sequence` string, uint64
  - `port_id` string
  - `proof_height` IbcCoreClientV1Height — Normally the RevisionHeight is incremented at each height while keeping RevisionNumber the same. However some consensus algorithms may choose to reset the height in certain conditions e.g. hard forks, state-machine breaking changes In these cases, the RevisionNumber is incremented so that height continues to be monitonically increasing even as the RevisionHeight gets reset
    - `revision_height` string, uint64
    - `revision_number` string, uint64
  - `proof_init` string, byte
  - `signer` string

## Response `200`

A successful response.

- IbcCoreChannelV1MsgChannelCloseConfirmResponse — MsgChannelCloseConfirmResponse defines the Msg/ChannelCloseConfirm response type.

## Other responses

- `default` — An unexpected error response.

## Changes

- **2025-03-27** `4f349536c8f3` — 1 info
  - endpoint added
- **2025-02-24** `2ab9d24288c2` — 1 breaking
  - api path removed without deprecation
- **2024-08-14** `21c607e4fa20` — 1 info
  - endpoint added
- **2024-07-31** `19416a3f0cd1` — 1 breaking
  - api path removed without deprecation
- **2024-07-11** `ca7e84576c8e` — 1 info
  - endpoint added

[Full history](https://skmtc.dev/pokt-network/apis/http-api-console/changes/ibc.core.channel.v1.Msg/ChannelCloseConfirm/post.md)

---

[API](https://skmtc.dev/pokt-network/apis/http-api-console.md) · [All operations](https://skmtc.dev/pokt-network/apis/http-api-console/llms.txt) · [OpenAPI document](https://skmtc.dev/pokt-network/apis/http-api-console/revisions/671fab54b729?raw)