From 2f48cac20796ed0892823cd33b615d15ffdcab22 Mon Sep 17 00:00:00 2001
From: Willem Wyndham <willem@ahalabs.dev>
Date: Tue, 21 Feb 2023 16:28:49 -0500
Subject: [PATCH] feat: copy `create_ledger_footprint` from CLI

This was in the utils.rs file in the cli and should be here
---
 soroban-env-host/src/storage.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/soroban-env-host/src/storage.rs b/soroban-env-host/src/storage.rs
index 0b18b65ba..093e8d47a 100644
--- a/soroban-env-host/src/storage.rs
+++ b/soroban-env-host/src/storage.rs
@@ -9,6 +9,7 @@
 
 use std::rc::Rc;
 
+use soroban_env_common::xdr::{self, LedgerFootprint};
 use soroban_env_common::Compare;
 
 use crate::budget::Budget;
@@ -116,6 +117,23 @@ impl Footprint {
             Err(ScHostStorageErrorCode::AccessToUnknownEntry.into())
         }
     }
+
+    pub fn create_ledger_footprint(&self) -> Result<LedgerFootprint, xdr::Error> {
+        let mut read_only: Vec<LedgerKey> = vec![];
+        let mut read_write: Vec<LedgerKey> = vec![];
+        let Footprint(m) = self;
+        for (k, v) in m {
+            let dest = match v {
+                AccessType::ReadOnly => &mut read_only,
+                AccessType::ReadWrite => &mut read_write,
+            };
+            dest.push((**k).clone());
+        }
+        Ok(LedgerFootprint {
+            read_only: read_only.try_into()?,
+            read_write: read_write.try_into()?,
+        })
+    }
 }
 
 #[derive(Clone)]