Update token docs (#360)
This commit is contained in:
parent
0c8981731b
commit
05999a91ed
|
@ -24,7 +24,7 @@ The Token Program's source is available on
|
|||
|
||||
The on-chain Token Program is written in Rust and available on crates.io as
|
||||
[spl-token](https://docs.rs/spl-token). The program's [instruction interface
|
||||
documentation](https://docs.rs/spl-token/1.0.2/spl_token/instruction/enum.TokenInstruction.html)
|
||||
documentation](https://docs.rs/spl-token/2.0.1/spl_token/instruction/enum.TokenInstruction.html)
|
||||
can also be found there.
|
||||
|
||||
Auto-generated C bindings are also available for the on-chain Token Program and
|
||||
|
@ -33,7 +33,7 @@ available
|
|||
|
||||
[Javascript
|
||||
bindings](https://github.com/solana-labs/solana-program-library/blob/master/token/js/client/token.js)
|
||||
are available that support loading the Token Program on to a chain and issuing
|
||||
are available that support loading the Token Program on to a chain and issue
|
||||
instructions.
|
||||
|
||||
## Command-line Utility
|
||||
|
@ -159,24 +159,27 @@ CqAxDdBRnawzx9q4PYM3wrybLHBhDZ4P6BTV13WsRJYJ AQoKYV7tYpTrFZN6P5oUufbQKAUr9mNYGe1
|
|||
### Creating a new token type
|
||||
|
||||
A new token type can be created by initializing a new Mint with the
|
||||
`InitializeMint` instruction. The Mint is used to create or "Mint" new tokens,
|
||||
`InitializeMint` instruction. The Mint is used to create or "mint" new tokens,
|
||||
and these tokens are stored in Accounts. A Mint is associated with each
|
||||
Account, which means that the total supply of a particular token type is equal
|
||||
to the balances of all the associated Accounts.
|
||||
|
||||
A Mint can either be configured with a fixed-supply or non-fixed supply. The
|
||||
total supply of a fixed-supply Mint is determined during initialization and
|
||||
deposited into a provided destination account. A non-fixed-supply Mint also has
|
||||
an owner associated with it who has the authority to create new tokens in the
|
||||
future with the `MintTo` instruction. Both types of Mints can `Burn` tokens to
|
||||
decrease supply.ß
|
||||
|
||||
It's important to note that the `InitializeMint` instruction does not require
|
||||
the Solana account being initialized also be a signer. The `InitializeMint`
|
||||
instruction should be atomically processed with the system instruction that
|
||||
creates the Solana account by including both instructions in the same
|
||||
transaction.
|
||||
|
||||
Once a Mint is initialized, the `mint_authority` can create new tokens using the
|
||||
`MintTo` instruction. As long as a Mint contains a valid `mint_authority`, the
|
||||
Mint is considered to have a non-fixed supply, and the `mint_authority` can
|
||||
create new tokens with the `MintTo` instruction at any time. The `SetAuthority`
|
||||
instruction can be used to irreversibly set the Mint's authority to `None`,
|
||||
rendering the Mint's supply fixed. No further tokens can ever be Minted.
|
||||
|
||||
Token supply can be reduced at any time by issuing a `Burn` instruction which
|
||||
removes and discards tokens from an Account.
|
||||
|
||||
### Creating accounts
|
||||
|
||||
Accounts hold token balances and are created using the `InitializeAccount`
|
||||
|
@ -205,13 +208,13 @@ to another Account, effectively removing the token from circulation permanently.
|
|||
|
||||
Account owners may delegate authority over some or all of their token balance
|
||||
using the `Approve` instruction. Delegated authorities may transfer or burn up
|
||||
to the amount they've been delegated. Authority delegation may be revoked by
|
||||
the Account's owner via the `Revoke` instruction.
|
||||
to the amount they've been delegated. Authority delegation may be revoked by the
|
||||
Account's owner via the `Revoke` instruction.
|
||||
|
||||
### Multisignatures
|
||||
|
||||
M of N multisignatures are supported and can be used in place of Mint owners, or
|
||||
Account owners or delegates. Multisignature owners or delegates must be
|
||||
M of N multisignatures are supported and can be used in place of Mint
|
||||
authorities or Account owners or delegates. Multisignature authorities must be
|
||||
initialized with the `InitializeMultisig` instruction. Initialization specifies
|
||||
the set of N public keys that are valid and the number M of those N that must be
|
||||
present as instruction signers for the authority to be legitimate.
|
||||
|
@ -222,6 +225,15 @@ require the Solana account being initialized also be a signer. The
|
|||
instruction that creates the Solana account by including both instructions in
|
||||
the same transaction.
|
||||
|
||||
### Freezing accounts
|
||||
|
||||
The Mint may also contain a `freeze_authority` can be used to issue
|
||||
`FreezeAccount` instructions that will render an Account unusable. Token
|
||||
instructions that include a frozen account will fail until the Account is thawed
|
||||
using the `ThawAccount` instruction. The `SetAuthority` instruction can be used
|
||||
to change a Mint's `freeze_authority`. If a Mint's `freeze_authority` is set to
|
||||
`None` then account freezing is permanently disabled
|
||||
|
||||
### Wrapping SOL
|
||||
|
||||
The Token Program can be used to wrap native SOL. Doing so allows native SOL to
|
||||
|
@ -242,9 +254,16 @@ These accounts have a few unique behaviors
|
|||
- Burning is not supported
|
||||
- When closing an Account the balance may be non-zero.
|
||||
|
||||
### Rent-exemption
|
||||
|
||||
To ensure a reliable calculation of supply, a consistency valid Mint, and
|
||||
consistently valid Multisig accounts all Solana accounts holding a Account,
|
||||
Mint, or Multisig must contain enough SOL to be considered (rent
|
||||
exempt)[https://docs.solana.com/implemented-proposals/rent]
|
||||
|
||||
### Closing accounts
|
||||
|
||||
An account may be closed using the `CloseAccount` instruction. When closing an
|
||||
Account, all remaining SOL will be transferred to another Solana account
|
||||
(doesn't have to be associated with the Token Program). Non-native accounts
|
||||
must have a balance of zero to be closed.
|
||||
(doesn't have to be associated with the Token Program). Non-native Accounts must
|
||||
have a balance of zero to be closed.
|
||||
|
|
Loading…
Reference in New Issue