Accounts
Tezos uses these types of accounts:
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Classic accounts (also known as implicit accounts) store tez (ꜩ) and tickets. These accounts have addresses that start with "tz1", "tz2", "tz3" or "tz4." Any wallet application or the Octez command-line tool can create implicit accounts.
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Smart contract accounts (also known as originated accounts) store immutable code, mutable storage, tez (ꜩ), and tickets. Smart contracts have addresses that start with "KT1." See Smart contracts.
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Smart Rollup accounts are another type of originated account. Their addresses start with
SR1
. They have a tree of commitments attached to them. See Smart Optimistic Rollups.