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A transaction that updates the properties of an existing account. The network will store the latest updates on the account. If you would like to retrieve the state of an account in the past, you can query a mirror node.
You cannot add an EVM Address from Public Key to an existing account. The alias is set only at account creation via setECDSAKeyWithAlias() / setKeyWithAlias() (or the equivalent in your SDK). AccountUpdateTransaction has no functional alias setter, so it cannot add or change an account’s EVM Address from Public Key. (Some SDKs, such as Java, expose a deprecated setAliasKey that has no on-wire effect.)If your existing account does not have an EVM Address from Public Key and you need EVM compatibility, the recommended path is to create a new ECDSA account with the EVM address set at creation and migrate assets and state. See Create an Account for the recommended pattern.Rotating keys with CryptoUpdateTransaction does not update the EVM address. The original EVM Address from Public Key remains tied to the original ECDSA public key.
Account Properties

Account Properties

Transaction Fees
  • The sender pays for the token association fee and the rent for the first auto-renewal period.
  • Please see the transaction and query fees table for the base transaction fee.
  • Please use the Hedera fee estimator to estimate the cost of your transaction fee.
Transaction Signing Requirements
  • The account key(s) are required to sign the transaction.
  • If you are updating the keys on the account, the OLD KEY and NEW KEY must sign.
    • If either is a key list, the key list keys are all required to sign.
    • If either is a threshold key, the threshold value is required to sign.
  • If you do not have the required signatures, the network will throw an INVALID_SIGNATURE error.

Maximum Auto-Associations and Fees

Accounts have a property, maxAutoAssociations, and the property’s value determines the maximum number of automatic token associations allowed.
The sender pays the maxAutoAssociations fee and the rent for the first auto-renewal period for the association. This is in addition to the typical transfer fees. This ensures the receiver can receive tokens without association and makes it a smoother transfer process.
Reference: HIP-904

Methods

Get transaction values

Return the properties of an account create transaction.