Add Ethereum Execution Tests (#5)

* ecadd tests

* ecmul tests

* Add test utils

* Add test suit generator

* Remove old tests

* Update tests

* Fix ecadd

* Fix ecmul

* Handle modexp tests

* Add modexp tests

* Update call helper function

* Fix helper function

* Fix test utils

* Improve ecmul precompile

* Add test helper

* Add python script to test double and add algorithm (#13)

* Add montgomery reduction algorithm

* Add Rust playground crate

* Update montgomery reduction script

* Add Montgomery reduction precompile

* ecAdd refactor

* Montgomery fix

* Add montgomery inv & modexp

* Fix N'

* Fix REDC

* Fix Montgomery modular inverse

* Remove comments

* Fix prints

* Change to bytes comparison instead of decoded output

* Patch tests with extra check for errors in ecadd and ecmul

* Add EOL

* Update modexp precompile

* Finish optimizing ecAdd & ecMul

* Implement optimized montgomery invmod

* modexpGasCost

* Cleanup

* Last version of ecAdd, ecMul & modexp

* Fix modexp tests calldata

* Fix modexp tests to pass with actual vm state

* Update Montgomery precompile

* Add EOL

---------

Co-authored-by: IAvecilla <iavecilla@fi.uba.ar>
Co-authored-by: Nacho Avecilla <nachoavecilla@gmail.com>

playground/.gitignore

@@ -0,0 +1 @@
+/target

playground/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "playground"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+lambdaworks-math ={ git = "https://github.com/lambdaclass/lambdaworks"}

playground/src/main.rs

@@ -0,0 +1,16 @@
+use lambdaworks_math::{field::{fields::montgomery_backed_prime_fields::{IsModulus, U256PrimeField}, element::FieldElement}, unsigned_integer::element::{U256, UnsignedInteger}};
+
+#[derive(Clone, Debug)]
+struct AltBn128Modulus;
+impl IsModulus<U256> for AltBn128Modulus {
+    const MODULUS: U256 = UnsignedInteger::from_hex_unchecked(
+        "30644E72E131A029B85045B68181585D97816A916871CA8D3C208C16D87CFD47",
+    );
+}
+
+type AltBn128PrimeField = U256PrimeField<AltBn128Modulus>; 
+type AltBn128FieldElement = FieldElement<AltBn128PrimeField>;
+
+fn main() {
+    println!("{:?}", AltBn128FieldElement::from(3).value().to_string())
+}