A fun/interesting cross-chain questions: SC is a smart-contract Ethereum and P is a program on Solana.
Alice is supposed to send 1 Solana based token (SPL token) A to P, and has an ERC20 token E in SC. SC is supposed to release E if she does send A to P. Can you design it?
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AMB (arbitrary message bridge) can do it between two EVM chains for any existing and future token standard without changes in the code of the bridge and any permissions to relay messages. For Solana chain will need R&D in adapters on Solana side
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