update readme

README.md

@@ -381,6 +381,49 @@ test function expect_fail() {
 }
 ```
 
+# Leo Inputs
+
+Public and private inputs for a Leo program are specified in the `inputs/` directory. The syntax for an input file is a limited subset of the Leo program syntax. The default inputs file is `inputs/inputs.leo`.
+
+## Sections
+A Leo input file is made up of sections. Sections are defined by a section header in brackets followed by one or more input definitions. 
+
+Section headers specify the target file which must have a main function with matching input names and types defined in the same order.
+
+`inputs/inputs.leo`
+
+```rust
+[main] // <- section header
+a: private u32 = 1; // <- private input
+b: public u32  = 2; // <- public input
+```
+
+`src/main.leo`
+
+```rust
+function main(a: private u32, b: public u32) -> u32 {
+    let c: u32 = a + b;
+    return c
+}
+```
+
+## Input Definitions
+
+### Supported types
+```rust
+[main]
+a: bool  = true;       // <- booleans
+b: u8    = 2;          // <- integers
+c: field = 0;          // <- fields
+d: group = (0, 1)group // <- group tuples
+```
+
+### Arrays
+```rust
+[main]
+a: private u8[4]    = [0u8; 4];      // <- single
+b: private u8[2][3] = [[0u8; 2]; 3]; // <- multi-dimensional
+```
 
 # Leo CLI
 
@@ -395,6 +438,7 @@ leo new {$NAME}
 This will create a new directory with a given package name. The new package will have a directory structure as follows:
 ```
 - inputs # Your program inputs
+    - inputs.leo # Your program inputs for main.leo
 - outputs # Your program outputs
 - src
     - lib.leo # Your program library
@@ -455,6 +499,8 @@ leo prove
 ```
 Leo starts by checking the `target` directory for an existing `.leo.pk` file. If it doesn't exist, it will proceed to run `leo setup` and then continue.
 
+Next any input files in the `inputs` directory are parsed and all input values are passed to the program.
+
 Once again, Leo uses cryptographic randomness from your machine to produce the proof. The proof is stored in the `target` directory as `.leo.proof`:
 
 ```

leo/commands/prove.rs

@@ -53,7 +53,7 @@ impl CLI for ProveCommand {
         inputs_file_path.push(INPUTS_DIRECTORY_NAME);
         inputs_file_path.push(INPUTS_FILE_NAME);
 
-        // Fetch private inputs here
+        // Fetch program inputs here
         let inputs_file_string = LeoInputsParser::load_file(&inputs_file_path)?;
         program.parse_inputs(&inputs_file_path, &inputs_file_string)?;