Near-FusionSwap
Two chains, two locks, one secret.
$5,000
won at ETHGlobal Unite DeFi, on the 1inch Fusion+ track
- Polygon mainnet ↔ NEAR
- Atomic: settles or refunds
- 1inch Fusion+ cross-chain SDK
The problem
Moving tokens between Polygon and NEAR usually means trusting a bridge to hold your funds in the middle.
What I did
I wrote the Solidity escrow contracts with Foundry, the NEAR HTLC contracts and the NestJS backend for swaps and orders. A teammate built the frontend.
How it works
Lock on both chains
Hash time-locked contracts escrow the funds on Polygon and on NEAR, both locked to the same secret hash.
Reveal to claim
The user reveals the secret to claim on one chain. That reveal is exactly what the resolver needs to claim on the other.
Refund on timeout
If either side stalls, the time locks expire and both sides get their funds back. It settles completely or not at all.
Route through 1inch Fusion+
Orders go through the 1inch cross-chain SDK, with a NestJS backend handling swap and order logic.
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