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Addresses in Sway are similar to EVM addresses. The two major differences are:

1. Sway addresses are 32 bytes long (instead of 20)
2. Sway addresses are computed with the SHA-256 hash of the public key instead of the keccak-256 hash.

Contracts, on the other hand, are uniquely identified with a contract ID rather than an address. A contract's ID is also 32 bytes long and is calculated here .