commit 0e3e11e3878e6d38bcd715df2fec91748da0a753
Author: Knaapchen <not@in.use>
Date:   Wed Aug 31 19:07:50 2022 +0200

    Initial version

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..3363a6a
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,96 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "fugg-fix-mapping"
+version = "0.1.0"
+dependencies = [
+ "parity-wasm",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
+
+[[package]]
+name = "parity-wasm"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be5e13c266502aadf83426d87d81a0f5d1ef45b8027f5a471c360abfe4bfae92"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+
+[[package]]
+name = "serde"
+version = "1.0.144"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.144"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94ed3a816fb1d101812f83e789f888322c34e291f894f19590dc310963e87a00"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.85"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e55a28e3aaef9d5ce0506d0a14dbba8054ddc7e499ef522dd8b26859ec9d4a44"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.99"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..23a5763
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "fugg-fix-mapping"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+parity-wasm = "0.42"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..6713980
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,77 @@
+use std::io::Read;
+use std::{io::Write, fs::File};
+use std::path::Path;
+use std::fs::OpenOptions;
+use std::collections::HashMap;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+struct FunctionFile {
+    imports: HashMap<String, String>,
+    exports: HashMap<String, String>    
+}
+
+fn main() {
+    let directory = Path::new("../fugg-fetch/out/55");
+
+    let input = directory.join("client-original.wasm");
+    let output = directory.join("client.wasm");
+    let functions_file = directory.join("functions.json");
+
+    let mut module = parity_wasm::deserialize_file(input).unwrap();
+    assert!(module.code_section().is_some());
+
+    let mut file = File::open(functions_file).unwrap();
+    let mut data = String::new();
+    file.read_to_string(&mut data).unwrap();
+
+    let functions: FunctionFile = serde_json::from_str(&data).expect("JSON was not well-formatted");
+    
+    println!("Functions: {:?}", functions);
+
+    const MODULE: &str = "env";
+
+    {
+        let import_section = module.import_section_mut().unwrap();
+
+        for entry in import_section.entries_mut() {
+            let nice_name = functions.imports.get(entry.field());
+
+            *entry.module_mut() = String::from(MODULE);
+            if let Some(nice_name) = nice_name {
+                println!("Import: Renaming {}::{} to {}::{}", entry.module(), entry.field(), MODULE, nice_name);
+
+                *entry.field_mut() = String::from(nice_name);
+            } else {
+                println!("Import: Unable to find nice name for {}::{}", entry.module(), entry.field());
+            }
+        }
+    }
+
+    {
+        let export_section = module.export_section_mut().unwrap();
+        
+        for entry in export_section.entries_mut() {
+            let nice_name = functions.exports.get(entry.field());
+
+            if let Some(nice_name) = nice_name {
+                println!("Export: Renaming {} to {}", entry.field(), nice_name);
+
+                *entry.field_mut() = String::from(nice_name);
+            } else {
+                println!("Export: Unable to find nice name for {}", entry.field());
+            }
+        }
+    }
+
+    let output_bytes = parity_wasm::serialize(module).unwrap();
+    let mut file = OpenOptions::new()
+        .write(true)
+        .create(true)
+        .open(output).unwrap();
+
+    file.write_all(&output_bytes).unwrap();
+
+
+}