# MRV aggregation and splitting for minting tokens

For a demo example of following steps, here is the policy timestamp: **1675266693.102366003**

### Adding aggregateDocumentBlock in separate containerAdding aggregateDocumentBlock in separate container**Task**

MRV documents feature a numerical measurement field. The values in this field are periodically aggregated, in this example we will use 1 minute period.

The purpose of the aggregation is to mint tokens, in this example 1 token will be minted for each part which equal to 1000 of the aggregated value.

### **Preparation**

Create a token and 2 schemas (**User** and **Report**). For simplicity the token will not require a KYC.

Build the first part of the document entry:

<figure><img src="/files/0x284lgbPt3xQV9xciFJ" alt=""><figcaption></figcaption></figure>

*(Please see* *examples* [*2* ](/technical-information/library-of-policy-examples/data-input-via-forms-using-roles-to-partition-user-activities.md)*and* [*3*](/technical-information/library-of-policy-examples/token-operations.md) *for more detailed description of this)*

#### **Aggregate:**

1. Add ‘**aggregateDocumentBlock**' after saving the document in the database. This is the block which would accumulate documents/values until the condition is met (which in this case is the event from the timer).

1.1 Put '**aggregateDocumentBlock**' in a separate container to avoid it from interfering with the working of '**interfaceStepBlock**'

<figure><img src="/files/BbOHodX6pQS681JbVcYc" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/iclJWqVEgV3YKjWShxCt" alt=""><figcaption></figcaption></figure>

1.2 Pass the document to the ‘***aggregateDocumentBlock***' after it is saved.

<figure><img src="/files/c64WPpAPnRuqbFyLn3JB" alt=""><figcaption></figcaption></figure>

2. Timer is a separate block called '***timerBlock***'

2.1 For each user there is a separate timer execution context (i.e., each user has an independent timer). For this it requires a document owned by the user to be passed into this. To ensure this, let’s add the timer immediately after user registration.

<figure><img src="/files/XFAxoz6PfYuiwQN3FRtt" alt=""><figcaption></figcaption></figure>

2.2 Set the timer to trigger every minute

<figure><img src="/files/HDSgIVufcMDpFJy20SpV" alt=""><figcaption></figcaption></figure>

2.3 Now after the timer is launched, it would create a ‘**TimerEvent**’ periodically every minute. And then connect it with ‘***aggregateDocumentBlock***':

<figure><img src="/files/2kNne3ULAW2ML5THYU8j" alt=""><figcaption></figcaption></figure>

#### **Split:**

1. To split the document into equal parts, add '***splitBlock***'

1.1 Add '***splitBlock***' immediately after the '***aggregateDocumentBlock***'

<figure><img src="/files/h8eD8ZVbn5woDL5FH3p7" alt=""><figcaption></figcaption></figure>

1.2 Configure the document field which would be used for splitting/aggregation

<figure><img src="/files/CuhcGYTB49LOWgRuZwxy" alt=""><figcaption></figcaption></figure>

1.3 Set a ‘**Threshold**’ to configure the value for splitting the document.

<figure><img src="/files/K8dh0jzf8fRqFqw6oRnF" alt=""><figcaption></figcaption></figure>

Setting the Threshold for split

#### **Mint:**

Add '***mintDocumentBlock***' immediately after ‘***splitBlock***' to mint tokes and configure the minting rule

<figure><img src="/files/477Yby7wVKEoR4Q5hkhp" alt=""><figcaption></figcaption></figure>


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