Grid Billing
Table of Contents
 Introduction
 Resources to Update
 Node Contract
 Rent Contract
 Name Contract
 Public IP
 Network Usage
 Billing History
Introduction
In this section, we explain how the billing works on the TFGrid by showing different examples such as node, rent and name contracts as well as public IP and network usage.
Resources to Update
Some of the used resources should be updated whenever you try to do these calculations, these resources are the TFT price and the cloud units (SU and CU).
Current TFT Price
TFT price can be retrieved directly through Stellar or from the Dashboard, through the price available in the header.
Current Cloud Units Values
The current cloud units values can be retrieved directly from TChain with the Polkadot UI and the current chain state.
 On the page
Chain State
, selecttfgridModule
as theselected state query
 Select
pricingPolicies(u32): Option<PalletTfgridPricingPolicy>
 Enter the value of the default pricing policy, which is
1
, or enter the value of any other policy if you need to use a custom one  Press
Enter
Note: Values on chain are expressed as "units USD per hour", where "1 unit USD" == 10.000.000 (or 1e7)
Node Contract
For this example, we will assume that the resources for this deployment are the following:
CRU: 2
MRU: 2
SRU: 15
HRU: 0
Calculating the CU
Let's calculate the CU of this deployment.
For our example, the CU value is 10 mUSD/h
. Make sure that this value is updated according to the current values.
CU = min( max(MRU/4, CRU/2), max(MRU/8, CRU), max(MRU/2, CRU/4) )
= min( max(2/4, 2/2), max(2/8, 2), max(2/2, 2/4) )
= min( max(0.5, 1), max(0.25, 2), max(1, 0.5) )
= min( 1, 2, 1 )
= 1
CU cost/hour = CU * CU pricing
= 1 * 10 mUSD/h
= 10 mUSD/h
Calculating the SU
Let's calculate the SU of this deployment.
The current SU value is 5 mUSD/h
. Make sure that this value is updated according to the current values.
SU = HRU/1200 + SRU/200
= 0/1200 + 15/200
= 0 + 0.075
= 0.075
SU cost/hour = SU * SU pricing
= 0.075 * 5 mUSD/h
= 0.375 mUSD/h
Calculating the Billing Rate for the Contract
Let's calculate the billing rate by combining the CU and SU from above.
For this example, the current TFT value is 0.011 USD
. Make sure that this value is updated according to the current TFT value.
Contract cost/hour = CU cost/hour + SU cost/hour
= 10 mUSD/h + 0.375 mUSD/h
= 10.375 mUSD/h
= 0.010375 USD/h
= 0.010375 * 24 * 30
= 7.47 USD/month
= 679.090909 TFT/month
= 0.943182 TFT/hour
Applying the Discounts
Before assuming that the price above is the final price, check first if your twin is eligible for any of the available staking discount levels. To understand more about discount levels, please read this section.
For this example, we assume that this twin has 18 months worth of TFTs staked, so the user will be eligible for a Gold discount level (60% discount).
The 60% discount is thus equivalent to paying only 40% of the total price, as shown below:
Cost with 60% discount = 0.943182 * 0.4
= 0.377273 TFT/hour
Rent Contract
Getting the Resources
You can get the resources of a node using different methods. You can use Grid Proxy, GraphQL and the Polkadot UI.

Using Grid Proxy
 Grid Proxy API
 Go to the section nodes endpoint
 Click on
Try it out
 Write the node ID
 Click on
Execute
 Grid Proxy URL
 You can use the following URL and replace <node_id> by the node ID:
https://gridproxy.grid.tf/nodes/<node_id>
 You can use the following URL and replace <node_id> by the node ID:
 Grid Proxy API

Using GraphQL
Navigate to ThreeFold's GraphQL, then use the following query and replace the node id with the desired node id.
query MyQuery { nodes(where: {nodeID_eq: 83}) { id farmingPolicyId resourcesTotal { cru mru sru hru } } }

TFChain and Polkadot UI
 On the page Chain State of the polakdot UI, select
tfgridModule
as theselected state query
 Select
nodes(u32): Option<TfchainSupportNode>
 Enter the node ID
 Press
Enter
 On the page Chain State of the polakdot UI, select
For our example, these are the resources for node 83
that will be used for the calculations.
CRU = 4
SRU = 119.24
HRU = 1863
MRU = 15.55
Calculating the CU
Let's calculate the CU of this deployment.
For our example, the CU value is 10 mUSD/h
. Make sure that this value is updated according to the current values.
CU = min( max(MRU/4, CRU/2), max(MRU/8, CRU), max(MRU/2, CRU/4) )
= min( max(15.55/4, 4/2), max(15.55/8, 4), max(15.55/2, 4/4) )
= min( max(3.8875, 2), max(1.94375, 4), max(7.775, 1) )
= min( 3.8875, 4, 7.775 )
= 3.8875
CU cost/hour = CU * CU pricing
= 3.8875 * 10 mUSD/h
= 38.875 mUSD/h
Calculating the SU
For our example, the SU value is 5 mUSD/h
. Make sure that this value is updated according to the current values.
SU = HRU/1200 + SRU/200
= 1863/1200 + 119.24/200
= 1.5525 + 0.5962
= 2.1487
SU cost/hour = SU * SU pricing
= 2.1487 * 5 mUSD/h
= 10.7435 mUSD/h
Calculating the Billing Rate for the Contract
For our example, the current TFT value is 0.011 USD
. Make sure that this value is updated according to the current values.
Contract cost/hour = CU cost/hour + SU cost/hour
= 38.875 mUSD/h + 10.7435 mUSD/h
= 49.6185 mUSD/h
= 0.0496185 USD/h
= (0.0496185 * 24 * 30)
= 35.72532 USD/month
= 3247.75636 TFT/month
Applying the Dedicated Node Discount
There's a default 50%
discount for renting a node, this discount is not related to the staking discount. For more information on dedicated node discounts, please read this section.
Cost with 50% discount = 35.72532 * 0.5
= 17.86266 TFT/month
Applying the Staking Discount
Before assuming that the price above is the final price, check first if your twin is eligible for any of the available staking discount levels. To understand more about discount levels, please read this section.
For this example, let's assume that this twin has 18 months worth of TFTs staked, so the user will be eligible for a Gold discount level (60% discount).
Cost with 60% discount = 17.86266 * 0.4
= 7.145064 TFT/month
Name Contract
Let's calculate the cost of a name contract.
For our example, we use the following value from the Pricing Policy.
This value can then be converted to USD.
uniqueName in USD = 2500 / 10000000
= 0.00025 USD/hour
Since the current TFT conversion rate is 1 USD = 100 TFT
, we have the following:
uniqueName in TFT = 0.00025 * 100
= 0.025 TFT/hour
Applying the Staking Discount
Before assuming that the price above is the final price, check first if your twin is eligible for any of the available staking discount levels. To understand more about discount levels, please read this section.
For this example, let's assume that this twin has 18 months worth of TFTs staked, so the user will be eligible for a Gold discount level (60% discount).
Cost with 60% discount = 0.025 * 0.4
= 0.01 TFT/hour
Public IP
Let's calculate the cost of public IPs.
For our example, we use the following value from the Pricing Policy.
This value can then be converted to USD.
Public IP in USD = 40000 / 10000000
= 0.004 USD/hour
Since the current TFT conversion rate is 1 USD = 100 TFT
, we have the following:
Public IP in TFT = 0.004 * 100
= 0.4 TFT/hour
Applying the Staking Discount
Before assuming that the price above is the final price, check first if your twin is eligible for any of the available staking discount levels. To understand more about discount levels, please read this section.
For this example, let's assume that this twin has 18 months worth of TFTs staked, so the user will be eligible for a Gold discount level (60% discount).
Cost with 60% discount = 0.4 * 0.4
= 0.16 TFT/hour
Note: This value gets added to the billing rate of your deployment.
Network Usage
Network Usage is calculated for deployments with public IPs. It's reported every hour and its cost can be calculated approximately as follows, where the data usage is the value of data sent and received:
network usage = data usage * NU value
Data Usage
To start, let's calculate the data usage. This can be tracked with a network tool like nload, where the total amount of data sent and received can be displayed.
NU Value
Let's find the NU value of this deployment.
For our example, we use the following value from the Pricing Policy.
This value can then be converted to USD.
NU price in USD = 15000 / 10000000
= 0.0015 USD/hour
Since in our example the current TFT conversion rate is 1 USD = 100 TFT
, we have the following:
NU price in TFT = 0.0015 * 100
= 0.15 TFT/hour
Applying the Staking Discount
Before assuming that the price above is the final price, check first if your twin is eligible for any of the available staking discount levels. To understand more about discount levels, please read this section.
For this example, let's assume that this twin has 18 months worth of TFTs staked, so the user will be eligible for a Gold discount level (60% discount).
Cost with 60% discount = 0.15 * 0.4
= 0.06 TFT/hour
As an example, let's assume that we used a total of 10GB in the last hour, so the next hour the billing rate should be updated to:
Total network usage = 10GB * 0.06 TFT/hour
= 0.6 TFT/hour
The billing rate in the next hour should be the following:
hourly billing rate = actual cost of the deployment + total network usage
Note: The calculated value will always be an approximation since it's not possible to manually calculate the exact value of the data used.
Billing History
Since the billing rate gets updated hourly, you can check the billing history from GraphQL using the following query. Make sure to enter the proper contract ID.
query MyQuery {
contractBillReports(where: {contractID_eq: ""}) {
contractID
amountBilled
discountReceived
timestamp
}
}