NEAR uses human readable account IDs instead of a public key hash. For a 20-minute video explanation, see this Lunch and Learn on YouTube.
Account ID Rules
- minimum length is 2
- maximum length is 64
Account IDconsists of
Account ID partsseparated by
Account ID partconsists of lowercase alphanumeric symbols separated by either
Account names are similar to a domain names. Anyone can create a top-level account (TLA) without separators, e.g.
near can create
alice.near. And only
alice.near can create
app.alice.near and so on. Note,
near can NOT create
Regex for a full account ID, without checking for length:
Top-level account names (TLAs) are very valuable as they provide root of trust and discoverability for companies, applications and users. To allow for fair access to them, the top-level account names that are shorter than
MIN_ALLOWED_TOP_LEVEL_ACCOUNT_LENGTH characters (32 at time of writing) will be auctioned off.
REGISTRAR_ACCOUNT_ID account can create new top-level accounts that are shorter than
REGISTRAR_ACCOUNT_ID implements a standard
Account Naming interface which allow it to create new accounts.
We are not going to deploy the
registrar auction at launch. Instead we will allow it to be deployed by the Near Foundation at some point in the future.
mainnet accounts use a
near top-level account name (ex
example.near) and all
testnet accounts use a
testnet top-level account (ex.
As stated before, account names on NEAR follow a similar naming pattern to that of website domains with similar rules. Accounts can create as many subaccounts as they wish, and only the parent account can create a subaccount. For example,
example.near can create
subaccount2.example.near but CAN NOT create
subaccount.example.near can create
sub.subaccount.example.near in the same way
test.near can NOT create
subaccount.example.near. Only the direct parent account has permission to create a subaccount.
Implicit accounts work similarly to Bitcoin/Ethereum accounts. They allow you to reserve an account ID before it's created by generating a ED25519 key-pair locally. This key-pair has a public key that maps to 64 character hex representation which becomes the account ID.
- Public key in base58:
- Implicit Account:
[ Click here ] for more information as well as a guide on implicit account creation.
Dev accounts are special accounts made automatically by tools like near-cli and the wallet to help you automate testing and deploying of contracts. Since every account can have a contract, but re-deploying contracts DOES NOT create new state, you often want to deploy to a completely different account when testing.
Note: When deploying multiple test examples and creating new dev accounts, you will need to "Sign Out" of the NEAR Wallet on any
localhostexamples and "Sign In" again! Signing in adds an access key to your account and saves the private key in localStorage so the app can call contract methods without asking for approval again. BUT! There's a chance you're now trying to interact with a contract that is deployed on a completely different dev account.
How to create a dev account
When you run the command
dev-deployfrom near-cli, it looks for a file here
/neardev/dev-accountwith the dev account ID to deploy to.
If it doesn't find one, it creates a dev-account (using our cloud helper service for creating test accounts) and then creates the folder for you with the
It will also create the associated credentials, a public and private keypair here:
~/.near-credentials/default/[dev-account-id].json. Go ahead and try it:
- Replace dev-account-id with the account ID here
/neardev/dev-accountand open the json file up in your editor of choice (code for VS Code).
How do I get another one
- Delete the folder
near dev-deploy [wasmFile default="/out/main.wasm"]and you'll see a new dev account was created in
neardevand credentials are also stored for you.
Ok I have a dev account, so what?
These accounts and associated keypairs found in the json file are super useful for automating your testing.
Many examples in the NEAR ecosystem use some sort of
yarn dev:deployscript that deploys contracts and maybe even run some tests. It's important to know how these accounts are created, where their credentials are stored and how you can use them yourself.
NEAR uses human readable account IDs instead of a public key hash as the account identifier and many keys (public/private key pairs) can be created for each account that we call "Access Keys". Currently, there are two types of access keys;
Full Access Keys
As the name suggests,
FullAccess keys have full control of an account similar to having administrator privileges on your operating system. With this key you have the ability to perform any of the eight action types on NEAR without any limitations.
- Create Account
- Delete Account
- Add Key
- Delete Key
- Deploy Contract
- Function Call
- Transfer Ⓝ
- Stake Ⓝ (for validators)
See our action specifications section for more details.
Function Call Keys
FunctionCall key is unique as it only has permission to call a smart contract's method(s) that do not attach Ⓝ as a deposit (i.e. payable functions). These keys have the following three attributes:
allowance- the amount of Ⓝ the key is allowed to spend on gas fees (optional - default:
receiver_id- contract the key is allowed to call methods on (required)
method_names- contract methods the key is allowed to call (optional) Note: If
allowanceis omitted the default will be
nulland key will only be allowed to call view methods. Allowance can not be added after key is created.
Note: If no specific method names are specified, all methods may be called.
The easiest way to create a
FunctionCall key with your dApp is to prompt users to sign in using NEAR Wallet via
WalletConnection. This prompts users to authorize access and upon approval a
FunctionCall key is created. This key is only allowed to call methods on the contract that redirected the user to NEAR Wallet with a default allowance of 0.25 Ⓝ to cover gas costs for transactions. As non-monetary transactions are performed with this key, you will notice the allowance decreases and once 0.25 Ⓝ is burnt a new key will need to be created. If a request is made to transfer ANY amount of tokens with a
FunctionCall key, the user will be redirected back to wallet to authorize this transaction. You can see this functionality in action by trying out NEAR Guestbook.
Another way to create a
FunctionAccess key is to use
add-key command. With
near-cli you can be more specific with your
FunctionCall key by only allowing it to call specific contract methods as well as make adjustments to the allowance amount.
FunctionCall access keys are a powerful usability feature of NEAR opening up many possibilities. Not only can you eliminate the need for users to authorize small transactions over and over again but you could even allow a user to interact with the blockchain without ever having to create an account. This can be accomplished by having the dApp automatically create a
FunctionCall key that points to itself with a single click on your front-end allowing anyone to interact with your dApp seamlessly.
Compared to Ethereum
If you're familiar with development on Ethereum, it's worth making a quick note about how accounts are different. The image below summarizes some key differences.
image source: medium.com/@clinder
Accounts and Contracts
Each NEAR account can only hold 1 smart contract. For applications where users should be able to organize multiple contracts you can create "subaccounts" whose "master account" is the user account. The format of a subaccount would include a dot in the name like
contract2.user-A-account, etc. NEAR restricts the creation of accounts with a dot in the name such that these accounts can only by created by
user-A-account, as if the user account is a top-level domain like
your-company.com if you're familiar with this model.
Using NEAR CLI you could deploy new contracts to your account like this:
near deploy --wasm-file path/to/contract.wasm --account-id contractAccount.developerAccount.testnet --master-account yourAccount.testnet
Note for this to work you will need to login with NEAR CLI and authorize it to use the master account (
YOUR_ACCOUNT.testnet) on your behalf. Learn more about NEAR CLI here
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