From 27069656be40081303b7e3888b37b5c23231c5df Mon Sep 17 00:00:00 2001
From: Julius Michaelis <gitter@liftm.de>
Date: Thu, 9 Jul 2020 17:33:12 +0900
Subject: add ipfs files chcid

---
 ipfs-api/src/client/internal.rs | 24 ++++++++++++++++++++++++
 ipfs-api/src/request/files.rs   | 16 ++++++++++++++++
 ipfs-api/src/response/files.rs  |  2 ++
 3 files changed, 42 insertions(+)

diff --git a/ipfs-api/src/client/internal.rs b/ipfs-api/src/client/internal.rs
index ef4e9f2..6c646cc 100644
--- a/ipfs-api/src/client/internal.rs
+++ b/ipfs-api/src/client/internal.rs
@@ -1257,6 +1257,30 @@ impl IpfsClient {
         .await
     }
 
+    /// Change the cid version or hash function of the root node of a given path.
+    ///
+    /// ```no_run
+    /// use ipfs_api::IpfsClient;
+    /// use std::fs::File;
+    ///
+    /// let client = IpfsClient::default();
+    /// let res = client.files_chcid("/test/", 1, Some("sha3-512"));
+    /// ```
+    ///
+    /// Not specifying a byte `count` writes the entire input.
+    ///
+    #[inline]
+    pub async fn files_chcid(
+        &self,
+        path: &str,
+        cid_version: i32,
+        hash: Option<&str>,
+    ) -> Result<response::FilesChcidResponse, Error>
+    {
+        self.request_empty(request::FilesChcid { path, cid_version, hash }, None)
+            .await
+    }
+
     /// List blocks that are both in the filestore and standard block storage.
     ///
     /// ```no_run
diff --git a/ipfs-api/src/request/files.rs b/ipfs-api/src/request/files.rs
index 564bd6c..6525a11 100644
--- a/ipfs-api/src/request/files.rs
+++ b/ipfs-api/src/request/files.rs
@@ -124,3 +124,19 @@ pub struct FilesWrite<'a> {
 impl<'a> ApiRequest for FilesWrite<'a> {
     const PATH: &'static str = "/files/write";
 }
+
+#[derive(Serialize)]
+pub struct FilesChcid<'a> {
+    #[serde(rename = "arg")]
+    pub path: &'a str,
+
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub hash: Option<&'a str>,
+
+    #[serde(rename = "cid-version")]
+    pub cid_version: i32,
+}
+
+impl<'a> ApiRequest for FilesChcid<'a> {
+    const PATH: &'static str = "/files/chcid";
+}
diff --git a/ipfs-api/src/response/files.rs b/ipfs-api/src/response/files.rs
index 069ba32..76dc4a1 100644
--- a/ipfs-api/src/response/files.rs
+++ b/ipfs-api/src/response/files.rs
@@ -54,6 +54,8 @@ pub struct FilesStatResponse {
 
 pub type FilesWriteResponse = ();
 
+pub type FilesChcidResponse = ();
+
 #[cfg(test)]
 mod tests {
     deserialize_test!(v0_files_ls_0, FilesLsResponse);
-- 
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