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Research Preview — This API is under development.

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Area

Calculate the area of a polygon in square meters. 
POST /compute/v0/area

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Request Body

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chainId
number
required
Target chain ID (e.g., 84532 for Base Sepolia, 8453 for Base).
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geometry
Input
required
The polygon geometry to measure.
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schema
string
required
EAS schema UID to issue the attestation against.
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recipient
string
Ethereum address to receive the attestation. Defaults to zero address if not provided.

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Example Request

curl -X POST https://api.astral.global/compute/v0/area \
  -H "Content-Type: application/json" \
  -d '{
    "chainId": 84532,
    "geometry": "0xpolygon...",
    "schema": "0xschema...",
    "recipient": "0xdef456..."
  }'

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Example Response

{
  "result": 5432.10,
  "units": "square_meters",
  "operation": "area",
  "timestamp": 1706400000,
  "inputRefs": [
    "0xpolygon..."
  ],
  "attestation": {
    "schema": "0x...",
    "attester": "0x...",
    "recipient": "0xdef456...",
    "data": "0x...",
    "signature": "0x..."
  },
  "delegatedAttestation": {
    "signature": "0x...",
    "attester": "0x...",
    "deadline": 1706403600
  }
}

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Notes

  • Uses PostGIS ST_Area function with geodetic calculation
  • Result is in square meters with square centimeter precision
  • Only valid for polygon geometries

SDK Method

See astral.compute.area()