How we connected an IBM quantum processor to the EVM using ZK-SNARKs (and patched memory collisions along the way)

Howdy everyone. I needed to share an structure challenge we've been working on to convey collectively two worlds with opposing mathematical rules: quantum computing and blockchain.

The essential drawback is understood: a blockchain demands strict determinism, whereas a quantum processor is pure chance and managed chaos. We needed to introduce true quantum entropy into an immutable report without breaking the network.

Here's how we structured the bridge:

1. Pure Entropy Era

We ran a Hadamard circuit immediately on a 127-qubit IBM physical processor.

By way of the Qiskit Runtime API, we obtained a signed "Quantum Witness Bundle."

We subjected this studying to a security suite of 38 exams, which it handed with a 100% success fee, mathematically confirming that it's really random noise of the very best high quality.

1. The ZK-SNARK "Flue"

Placing that fragile quantum knowledge instantly on-chain was unfeasible.

We compiled an ultra-compact circuit at Circom (with almost 5,000 nonlinear restrictions) that privately demonstrates that we've a legitimate post-quantum signature on a Merkle tree.

This is compressed right into a Groth16Verifier.sol verification contract that validates the check in milliseconds instantly on the grid, saving a fortune in fuel.

To generate the bottom parameters of the Groth16 protocol, we ran an area "Powers of Tau" ceremony after dealing with exterior community crashes.

1. Sensible Contract Shielding

Once we reached the Sensible Contracts layer, we detected a reminiscence collision vulnerability resulting from using dynamic memory.

We minimize it brief: we removed dynamic reminiscence and carried out the EIP-7201 normal.

We calculated the precise coordinates outdoors the network and embedded them as absolute hexadecimal constants, blinding potential attackers.

It is an institutional-grade ecosystem already in operation. I'd love to hear how other builders are approaching off-chain entropy injection in a trustless means, or if they see any attack vectors in the Witness Bundle's transition to SNARK.