diff --git a/src/cairo/Scarb.lock b/src/cairo/Scarb.lock
new file mode 100644
index 00000000..21c19920
--- /dev/null
+++ b/src/cairo/Scarb.lock
@@ -0,0 +1,6 @@
+# Code generated by scarb DO NOT EDIT.
+version = 1
+
+[[package]]
+name = "garaga"
+version = "0.1.0"
diff --git a/src/cairo/Scarb.toml b/src/cairo/Scarb.toml
new file mode 100644
index 00000000..e282801b
--- /dev/null
+++ b/src/cairo/Scarb.toml
@@ -0,0 +1,12 @@
+[package]
+name = "garaga"
+version = "0.1.0"
+licence = "MIT"
+keywords = ["zk", "snarks", "curve", "pairing", "groth16", "plonk", "bls", "elliptic", "signature"]
+description = "State-of-the-art Elliptic Curve operations and SNARKS verification for Cairo & Starknet"
+readme = "../../README.md"
+repository = "https://github.com/keep-starknet-strange/garaga"
+
+# See more keys and their definitions at https://docs.swmansion.com/scarb/docs/reference/manifest.html
+
+[dependencies]
diff --git a/src/cairo/src/definitions.cairo b/src/cairo/src/definitions.cairo
new file mode 100644
index 00000000..272041c9
--- /dev/null
+++ b/src/cairo/src/definitions.cairo
@@ -0,0 +1,165 @@
+use core::circuit::{u96, u384};
+
+struct G1Point {
+    x: u384,
+    y: u384,
+}
+
+struct Fq2 {
+    a0: u384,
+    a1: u384,
+}
+
+struct G2Point {
+    x: Fq2,
+    y: Fq2,
+}
+
+struct Curve {
+    p: u384, // Prime modulus
+    n: u384, // Order of the curve
+    a: u384, // Weierstrass a parameter in eqn: y^2 = x^3 + ax + b
+    b: u384, // Weierstrass b parameter in eqn: y^2 = x^3 + ax + b
+    g: u384, // Generator of Fp. (Used to verify square roots)
+    min_one: u384, // (-1) % p
+}
+
+const all_curves: [Curve; 5] = [BN254, BLS12_381, SECP256K1, SECP256R1, X25519];
+
+
+const BN254: Curve =
+    Curve {
+        p: u384 {
+            limb0: 0x6871ca8d3c208c16d87cfd47,
+            limb1: 0xb85045b68181585d97816a91,
+            limb2: 0x30644e72e131a029,
+            limb3: 0x0
+        },
+        n: u384 {
+            limb0: 0x79b9709143e1f593f0000001,
+            limb1: 0xb85045b68181585d2833e848,
+            limb2: 0x30644e72e131a029,
+            limb3: 0x0
+        },
+        a: u384 { limb0: 0x0, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        b: u384 { limb0: 0x3, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        g: u384 { limb0: 0x3, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        min_one: u384 {
+            limb0: 0x6871ca8d3c208c16d87cfd46,
+            limb1: 0xb85045b68181585d97816a91,
+            limb2: 0x30644e72e131a029,
+            limb3: 0x0
+        },
+    };
+
+const BLS12_381: Curve =
+    Curve {
+        p: u384 {
+            limb0: 0xb153ffffb9feffffffffaaab,
+            limb1: 0x6730d2a0f6b0f6241eabfffe,
+            limb2: 0x434bacd764774b84f38512bf,
+            limb3: 0x1a0111ea397fe69a4b1ba7b6
+        },
+        n: u384 {
+            limb0: 0xfffe5bfeffffffff00000001,
+            limb1: 0x3339d80809a1d80553bda402,
+            limb2: 0x73eda753299d7d48,
+            limb3: 0x0
+        },
+        a: u384 { limb0: 0x0, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        b: u384 { limb0: 0x4, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        g: u384 { limb0: 0x3, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        min_one: u384 {
+            limb0: 0xb153ffffb9feffffffffaaaa,
+            limb1: 0x6730d2a0f6b0f6241eabfffe,
+            limb2: 0x434bacd764774b84f38512bf,
+            limb3: 0x1a0111ea397fe69a4b1ba7b6
+        },
+    };
+
+const SECP256K1: Curve =
+    Curve {
+        p: u384 {
+            limb0: 0xfffffffffffffffefffffc2f,
+            limb1: 0xffffffffffffffffffffffff,
+            limb2: 0xffffffffffffffff,
+            limb3: 0x0
+        },
+        n: u384 {
+            limb0: 0xaf48a03bbfd25e8cd0364141,
+            limb1: 0xfffffffffffffffebaaedce6,
+            limb2: 0xffffffffffffffff,
+            limb3: 0x0
+        },
+        a: u384 { limb0: 0x0, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        b: u384 { limb0: 0x7, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        g: u384 { limb0: 0x3, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        min_one: u384 {
+            limb0: 0xfffffffffffffffefffffc2e,
+            limb1: 0xffffffffffffffffffffffff,
+            limb2: 0xffffffffffffffff,
+            limb3: 0x0
+        },
+    };
+
+const SECP256R1: Curve =
+    Curve {
+        p: u384 {
+            limb0: 0xffffffffffffffffffffffff, limb1: 0x0, limb2: 0xffffffff00000001, limb3: 0x0
+        },
+        n: u384 {
+            limb0: 0xa7179e84f3b9cac2fc632551,
+            limb1: 0xffffffffffffffffbce6faad,
+            limb2: 0xffffffff00000000,
+            limb3: 0x0
+        },
+        a: u384 {
+            limb0: 0xfffffffffffffffffffffffc, limb1: 0x0, limb2: 0xffffffff00000001, limb3: 0x0
+        },
+        b: u384 {
+            limb0: 0xcc53b0f63bce3c3e27d2604b,
+            limb1: 0xb3ebbd55769886bc651d06b0,
+            limb2: 0x5ac635d8aa3a93e7,
+            limb3: 0x0
+        },
+        g: u384 { limb0: 0x6, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        min_one: u384 {
+            limb0: 0xfffffffffffffffffffffffe, limb1: 0x0, limb2: 0xffffffff00000001, limb3: 0x0
+        },
+    };
+
+const X25519: Curve =
+    Curve {
+        p: u384 {
+            limb0: 0xffffffffffffffffffffffed,
+            limb1: 0xffffffffffffffffffffffff,
+            limb2: 0x7fffffffffffffff,
+            limb3: 0x0
+        },
+        n: u384 {
+            limb0: 0xa2f79cd65812631a5cf5d3ed,
+            limb1: 0x14def9de,
+            limb2: 0x1000000000000000,
+            limb3: 0x0
+        },
+        a: u384 {
+            limb0: 0xaaaaaaaaaaaaaa984914a144,
+            limb1: 0xaaaaaaaaaaaaaaaaaaaaaaaa,
+            limb2: 0x2aaaaaaaaaaaaaaa,
+            limb3: 0x0
+        },
+        b: u384 {
+            limb0: 0x5ed097b4260b5e9c7710c864,
+            limb1: 0x97b425ed097b425ed097b42,
+            limb2: 0x7b425ed097b425ed,
+            limb3: 0x0
+        },
+        g: u384 { limb0: 0x6, limb1: 0x0, limb2: 0x0, limb3: 0x0 },
+        min_one: u384 {
+            limb0: 0xffffffffffffffffffffffec,
+            limb1: 0xffffffffffffffffffffffff,
+            limb2: 0x7fffffffffffffff,
+            limb3: 0x0
+        },
+    };
+
diff --git a/src/cairo/src/lib.cairo b/src/cairo/src/lib.cairo
new file mode 100644
index 00000000..7cd771b4
--- /dev/null
+++ b/src/cairo/src/lib.cairo
@@ -0,0 +1,77 @@
+mod definitions;
+
+#[cfg(test)]
+mod tests {
+    use core::traits::TryInto;
+    use core::circuit::{
+        RangeCheck96, AddMod, MulMod, u96, CircuitElement, CircuitInput, CircuitDefinition,
+        circuit_add, circuit_sub, circuit_mul, circuit_inverse, EvalCircuitResult, FillInputResult,
+        InputAccumulatorTrait, CircuitDescriptorTrait, u384, CircuitOutputsTrait, CircuitModulus
+    };
+
+    #[test]
+    fn test_u96() {
+        let a: u96 = 0x123;
+        assert_eq!(a, 0x123);
+    }
+
+    #[test]
+    fn test_builtins() {
+        core::internal::require_implicit::<RangeCheck96>();
+        core::internal::require_implicit::<AddMod>();
+        core::internal::require_implicit::<MulMod>();
+    }
+
+    #[test]
+    fn test_circuit_success() {
+        let in1 = CircuitElement::<CircuitInput<0>> {};
+        let in2 = CircuitElement::<CircuitInput<1>> {};
+        let add = circuit_add(in1, in2);
+        let inv = circuit_inverse(add);
+        let sub = circuit_sub(inv, in2);
+        let mul = circuit_mul(inv, sub);
+        let circ = (mul,);
+        let inputs = circ.init();
+
+        let inputs = match inputs.fill_input([3, 0, 0, 0]) {
+            FillInputResult::More(new_inputs) => new_inputs,
+            FillInputResult::Done(_data) => { panic!("Expected more inputs") }
+        };
+        let data = match inputs.fill_input([6, 0, 0, 0]) {
+            FillInputResult::More(_new_inputs) => panic!("Expected Done"),
+            FillInputResult::Done(data) => data
+        };
+
+        let modulus = TryInto::<_, CircuitModulus>::try_into([7, 0, 0, 0]).unwrap();
+        let outputs = match circ.get_descriptor().eval(data, modulus) {
+            EvalCircuitResult::Success(outputs) => { outputs },
+            EvalCircuitResult::Failure((_, _)) => { panic!("Expected success") }
+        };
+
+        assert_eq!(outputs.get_output(add), u384 { limb0: 2, limb1: 0, limb2: 0, limb3: 0 });
+        assert_eq!(outputs.get_output(inv), u384 { limb0: 4, limb1: 0, limb2: 0, limb3: 0 });
+        assert_eq!(outputs.get_output(sub), u384 { limb0: 5, limb1: 0, limb2: 0, limb3: 0 });
+        assert_eq!(outputs.get_output(mul), u384 { limb0: 6, limb1: 0, limb2: 0, limb3: 0 });
+    }
+
+
+    #[test]
+    fn test_circuit_failure() {
+        let in0 = CircuitElement::<CircuitInput<0>> {};
+        let out0 = circuit_inverse(in0);
+        let circ = (out0,);
+        let inputs = circ.init();
+
+        let data = match inputs.fill_input([11, 0, 0, 0]) {
+            FillInputResult::More(_new_inputs) => panic!("Expected Done"),
+            FillInputResult::Done(data) => data
+        };
+
+        let modulus = TryInto::<_, CircuitModulus>::try_into([55, 0, 0, 0]).unwrap();
+
+        match circ.get_descriptor().eval(data, modulus) {
+            EvalCircuitResult::Failure((_, _)) => {},
+            EvalCircuitResult::Success(_outputs) => { panic!("Expected failure"); }
+        }
+    }
+}