Nonce for this access key, used for tx nonce generation. When access key is created, nonce
is set to (block_height - 1) * 1e6 to avoid tx hash collision on access key re-creation.
See https://github.com/near/nearcore/issues/3779 for more details.
Defines permissions for this access key.
Access key provides limited access to an account. Each access key belongs to some account and is identified by a unique (within the account) public key. One account may have large number of access keys. Access keys allow to act on behalf of the account by restricting transactions that can be issued.
account_id,public_keyis a key in the state