# Quota
TIP
Quota and related topics are described in this page.
Definition of Terms:
- Quota： In Vite network, CPU cycles, storage space and network bandwidth consumed in transactions are paid by quota, instead of transaction fees or gas.
- UT： Unit Transaction. 1 UT is equivalent to the quota amount consumed in one transfer transaction without comment.
- PoW： Abbr. of "Proof of Work", representing a certain amount of computational work that has been performed
- Stake： Lock up an certain amount of VITE in account in exchange for quota
- Staking address：The address of the account from which the staking transaction is initiated
- Quota beneficiary：The account receiving quota
# What is Quota
In Ethereum, in order to have transaction executed quickly, user usually has to offer miner a competitive gas fee. The higher the fee is offered, the sooner the transaction will be executed. This is a typical bidding model, where system's processing capacity and pending transaction amount are balanced by gas price. This model works fine in Ethereum, however, it is not easy for a user to determine what price is "competitive but not exaggerated" at a certain time. Too low or too high offering will cause market failure. Moreover, Ethereum's gas is associated with transactions, there is no measurement to allocate computational resources efficiently at account level.
Vite does not charge transaction fee. Instead, an amount of quota is consumed when sending transaction. All operations, including transfer, deploying smart contract, calling smart contract, issuing token, registering SBP, retrieving mining rewards, voting and staking, consume quota. To meet this requirement, a unique quota generation and consumption model is implemented in Vite network.
To get quota for your account, you can
- Obtain a piece of small, one-time quota by calculating a PoW puzzle upon sending transaction, or
- Stake VITE coin
Staking Recommended
Calculating PoW is sufficient if you intend to send only a few transactions. But if many transactions are to be sent in a short time, you should stake.
We recommend you stake.
# Quota Consumption Rules
The following table lists quota consumption of common transactions:
| Transaction Type | Quota Consumed | In Unit Transaction (UT) | Minimum Staking Amount（VITE） |
|---|---|---|---|
| Send a transfer without comment | 21000 | 1 | 134 |
| Receive a transaction | 21000 | 1 | 134 |
| Create smart contract | 31000 | 1.4762 | 267 |
| Register SBP | 168000 | 8 | 1067 |
| Update block creation address | 168000 | 8 | 1067 |
| Update SBP reward retrieval address | 168000 | 8 | 1067 |
| Cancel SBP registration | 126000 | 6 | 534 |
| Retrieve SBP rewards | 147000 | 7 | 934 |
| Vote | 84000 | 4 | 534 |
| Cancel voting | 52500 | 2.5 | 400 |
| Stake for quota | 105000 | 5 | 667 |
| Cancel staking | 105000 | 5 | 667 |
| Stake for quota with callback | 115500 | 5.5 | 800 |
| Cancel staking with callback | 115500 | 5.5 | 800 |
| Issue new token | 189000 | 9 | 1200 |
| Re-issue an additional amount of token | 126000 | 6 | 800 |
| Burn token | 115500 | 5.5 | 800 |
| Transfer token ownership | 136500 | 6.5 | 934 |
| Change token type | 115500 | 5.5 | 800 |
| Query token information | 31500 | 1.5 | 267 |
In addition, each character in comment field of transaction consumes 68 quota.
For example, sending a transfer transaction with comment of '0x0001' (two hexadecimal characters) will consume
1.0065 UT. Additional Quota Cost
- Due to implementation of VEP-8, a 2-char prefix that takes additional 136 quota will be added to your comment if you send a transaction with comment in Vite official wallet.
- If Response Latency is assigned upon smart contract creation, an additional quota of
will be charged for response transactions of the contract. Response latency defines a waiting number that specifies in how many confirmations the contract will produce a response transaction for request.
# Quota Calculation
Quota is calculated by the following formulas:
: Quota received through PoW. Valid only for the current transaction: Quota received through staking. This quota is recovered every snapshot block, and, if not used, is able to accumulate for up to 75 snapshot blocks : Quota cap of account : Quota factor, related to total quota consumed in last 74 snapshot blocks : Difficulty of PoWpuzzle that has been resolved: Calculation weight of PoW: Staking amount of account : Calculation weight of staking
In Vite network, quota cap and calculation weights are constants:
= 1000000 = 6.259408129e-10 = 4.201037667e-24
Quota factor is calculated by the following formula:
$$ Qc = \begin{cases} 1, & \text{for } g \leq 1050000 \ 2-e^{8.260667775706495e-09 \times (g - 1050000)}, & \text{for } 1050000 < g \leq 2100000 \ e^{1.6949794096275418e-10 \times (2100000-g)}-0.9, & \text{for } g > 2100000 \ \end{cases} $$
: Average quota consumed in last 74 snapshot blocks
UTPS: Unit transactions per second, referring to the number of unit transactions that an account can send in one second
UTPE: Unit transactions per epoch, referring to the number of unit transactions that an account can send in 75 snapshot blocks
The available quota of an account depends on UTPS and quota consumption during the last 74 snapshot blocks. For example, Account A receives 1 UTPS quota through staking, no transaction occurs during the last 74 snapshot blocks, in this case, the available quota of Account A is 75 UT.
The actual available quota of an account upon sending transaction depends on UTPS, quota consumption during last 74 snapshot blocks and PoW .
For example, Account B receives 1 UTPS quota through staking, no transaction occurs during the last 74 snapshot blocks, while he also calculated a PoW equivalent to 2 UT, in this case, the actual available quota of Account B is 77 UT.
Quota Cap
For a single transaction, the maximum quota can be consumed is defined as 47.62 UT.
For convenience in calculation, it is practical to calculate value of
| UTPS | UTPE | Approximately equivalent to how much VITE staked without calculating PoW | Approximately equivalent to how difficult the PoW calculated without staking | ||
|---|---|---|---|---|---|
| 0.0 | 0 | 0 | 0 | 0 | 0 |
| 280 | 1/75 | 1 | 134 | 894654 | |
| 560 | 2/75 | 2 | 267 | 1789307 | |
| 840 | 3/75 | 3 | 400 | 2683961 | |
| 1120 | 4/75 | 4 | 534 | 3578615 | |
| 1400 | 5/75 | 5 | 667 | 4473270 | |
| 1680 | 6/75 | 6 | 800 | 5367925 | |
| 1960 | 7/75 | 7 | 934 | 6262581 | |
| 2240 | 8/75 | 8 | 1067 | 7157239 | |
| 2520 | 9/75 | 9 | 1200 | 8051897 | |
| 2800 | 10/75 | 10 | 1334 | 8946557 | |
| 3080 | 11/75 | 11 | 1467 | 9841218 | |
| 3360 | 12/75 | 12 | 1600 | 10735880 | |
| 3640 | 13/75 | 13 | 1733 | 11630544 | |
| 3920 | 14/75 | 14 | 1867 | 12525211 | |
| 4200 | 15/75 | 15 | 2000 | 13419879 | |
| 4480 | 16/75 | 16 | 2133 | 14314549 | |
| 4760 | 17/75 | 17 | 2267 | 15209221 | |
| 5040 | 18/75 | 18 | 2400 | 16103896 | |
| 5320 | 19/75 | 19 | 2533 | 16998573 | |
| 5600 | 20/75 | 20 | 2667 | 17893253 | |
| 5880 | 21/75 | 21 | 2800 | 18787936 | |
| 6160 | 22/75 | 22 | 2933 | 19682622 | |
| 6440 | 23/75 | 23 | 3066 | 20577310 | |
| 6720 | 24/75 | 24 | 3200 | 21472002 | |
| 7000 | 25/75 | 25 | 3333 | 22366698 | |
| 7280 | 26/75 | 26 | 3466 | 23261397 | |
| 7560 | 27/75 | 27 | 3600 | 24156099 | |
| 7840 | 28/75 | 28 | 3733 | 25050806 | |
| 8120 | 29/75 | 29 | 3866 | 25945516 | |
| 8400 | 30/75 | 30 | 4000 | 26840230 | |
| 8680 | 31/75 | 31 | 4133 | 27734949 | |
| 8960 | 32/75 | 32 | 4266 | 28629672 | |
| 9240 | 33/75 | 33 | 4400 | 29524399 | |
| 9520 | 34/75 | 34 | 4533 | 30419131 | |
| 9800 | 35/75 | 35 | 4666 | 31313868 | |
| 10080 | 36/75 | 36 | 4799 | 32208609 | |
| 10360 | 37/75 | 37 | 4933 | 33103356 | |
| 10640 | 38/75 | 38 | 5066 | 33998108 | |
| 10920 | 39/75 | 39 | 5199 | 34892865 | |
| 11200 | 40/75 | 40 | 5333 | 35787628 | |
| 11480 | 41/75 | 41 | 5466 | 36682396 | |
| 11760 | 42/75 | 42 | 5599 | 37577171 | |
| 12040 | 43/75 | 43 | 5733 | 38471951 | |
| 12320 | 44/75 | 44 | 5866 | 39366737 | |
| 12600 | 45/75 | 45 |