87 lines
2.6 KiB
Go
87 lines
2.6 KiB
Go
/*
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Balance contract is a contract deployed in FrostFS sidechain.
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Balance contract stores all FrostFS account balances. It is a NEP-17 compatible
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contract, so it can be tracked and controlled by N3 compatible network
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monitors and wallet software.
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This contract is used to store all micro transactions in the sidechain, such as
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data audit settlements or container fee payments. It is inefficient to make such
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small payment transactions in the mainchain. To process small transfers, balance
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contract has higher (12) decimal precision than native GAS contract.
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FrostFS balances are synchronized with mainchain operations. Deposit produces
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minting of FROSTFS tokens in Balance contract. Withdraw locks some FROSTFS tokens
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in a special lock account. When FrostFS contract transfers GAS assets back to the
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user, the lock account is destroyed with burn operation.
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# Contract notifications
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Transfer notification. This is a NEP-17 standard notification.
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Transfer:
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- name: from
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type: Hash160
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- name: to
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type: Hash160
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- name: amount
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type: Integer
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TransferX notification. This is an enhanced transfer notification with details.
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TransferX:
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- name: from
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type: Hash160
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- name: to
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type: Hash160
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- name: amount
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type: Integer
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- name: details
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type: ByteArray
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Lock notification. This notification is produced when a lock account is
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created. It contains information about the mainchain transaction that has produced
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the asset lock, the address of the lock account and the FrostFS epoch number until which the
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lock account is valid. Alphabet nodes of the Inner Ring catch notification and initialize
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Cheque method invocation of FrostFS contract.
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Lock:
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- name: txID
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type: ByteArray
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- name: from
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type: Hash160
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- name: to
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type: Hash160
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- name: amount
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type: Integer
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- name: until
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type: Integer
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Mint notification. This notification is produced when user balance is
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replenished from deposit in the mainchain.
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Mint:
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- name: to
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type: Hash160
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- name: amount
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type: Integer
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Burn notification. This notification is produced after user balance is reduced
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when FrostFS contract has transferred GAS assets back to the user.
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Burn:
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- name: from
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type: Hash160
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- name: amount
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type: Integer
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# Contract storage scheme
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| Key | Value | Description |
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|-----------------------|------------|----------------------------------|
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| `netmapScriptHash` | Hash160 | netmap contract hash |
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| `containerScriptHash` | Hash160 | container contract hash |
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| circulationKey | int | the token circulation key value |
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*/
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package balance
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