From 1e7c2bc07594143bc18e9f970dda704452a14fe4 Mon Sep 17 00:00:00 2001
From: Arnaud Mimart <33665250+amimart@users.noreply.github.com>
Date: Tue, 28 Feb 2023 13:55:06 +0100
Subject: [PATCH] feat(storage): add cursor bs58 encoding helpers

---
 contracts/cw-storage/src/cursor.rs | 15 +++++++++++++++
 contracts/cw-storage/src/lib.rs    |  1 +
 2 files changed, 16 insertions(+)
 create mode 100644 contracts/cw-storage/src/cursor.rs

diff --git a/contracts/cw-storage/src/cursor.rs b/contracts/cw-storage/src/cursor.rs
new file mode 100644
index 00000000..6764f1ad
--- /dev/null
+++ b/contracts/cw-storage/src/cursor.rs
@@ -0,0 +1,15 @@
+use crate::msg::{Cursor, ObjectId};
+use crate::ContractError;
+use cosmwasm_std::{StdError, StdResult};
+
+pub fn encode(id: ObjectId) -> Cursor {
+    bs58::encode(id).into_string()
+}
+
+pub fn decode(cursor: String) -> StdResult<Cursor> {
+    let raw = bs58::decode(cursor)
+        .into_vec()
+        .map_err(|err| StdError::parse_err("Cursor", err))?;
+
+    String::from_utf8(raw).map_err(|err| StdError::parse_err("Cursor", err))
+}
diff --git a/contracts/cw-storage/src/lib.rs b/contracts/cw-storage/src/lib.rs
index d838ea40..6d87cde9 100644
--- a/contracts/cw-storage/src/lib.rs
+++ b/contracts/cw-storage/src/lib.rs
@@ -1,5 +1,6 @@
 pub mod contract;
 pub mod crypto;
+mod cursor;
 mod error;
 pub mod msg;
 pub mod state;