Spacewalk is a trust-minimized cross-chain bridge connecting Stellar and Polkadot, built by Pendulum. It bridges XLM and Stellar fiat-backed stablecoins (EURC, AUDD, NGNC, TZS, BRL) into Polkadot/Kusama DeFi and back via a vault/collateral model, giving Stellar assets interoperability with Substrate chains. Live on Pendulum mainnet.