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Cross-chain dApps (decentralized applications) are enabled by smart contracts interoperability on heterogeneous blockchains. Previous work on cross-chain smart contract invocation has limitations in satisfying compatibility, atomicity, and security simultaneously. To address these limitations, this paper presents a new system AtomCI that enables atomic cross-chain smart contract invocations spanning heterogeneous blockchains. Our system AtomCI is enabled by a synergy of three proposed components: (1) Smart Contract Design Patterns, (2) Cross-chain Expression Protocol, and (3) Cross-chain Service Community, which is based on smart contracts and provides honest and auditable cross-chain service. We implement a prototype of AtomCI and analyze its security. Extensive results show that AtomCI imposes reasonable cost and latency of end-to-end cross-chain smart contract invocations, and has less …