curl --request POST \
  --url https://test-api.shodai.network/v0/agreements/validate-template \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "metadata": {
    "templateId": "did:template:service-retainer-v0-1",
    "name": "Service Retainer"
  },
  "variables": {
    "serviceProviderRepresentative": {
      "type": "address",
      "subtype": "participant",
      "validation": {
        "required": true
      }
    },
    "clientRepresentative": {
      "type": "address",
      "subtype": "participant",
      "validation": {
        "required": true
      }
    },
    "retainerTitle": {
      "type": "string",
      "validation": {
        "required": true
      }
    }
  },
  "content": {
    "type": "md",
    "data": "# ${variables.retainerTitle}\n\nService agreement between provider and client."
  },
  "execution": {
    "initialize": {
      "initialState": "AWAITING_PAYMENT",
      "data": {}
    },
    "states": {
      "AWAITING_PAYMENT": {
        "description": "Waiting for initial payment proof."
      },
      "WORK_IN_PROGRESS": {
        "description": "Provider is performing the service."
      }
    },
    "inputs": {
      "submitInitialPaymentProof": {
        "issuer": {
          "type": "participant",
          "variable": "clientRepresentative"
        },
        "schema": {
          "paymentReference": {
            "type": "string",
            "validation": {
              "required": true
            }
          }
        }
      }
    },
    "transitions": [
      {
        "from": "AWAITING_PAYMENT",
        "to": "WORK_IN_PROGRESS",
        "conditions": [
          {
            "input": "submitInitialPaymentProof"
          }
        ]
      }
    ]
  }
}
'

const options = {
  method: 'POST',
  headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    metadata: {templateId: 'did:template:service-retainer-v0-1', name: 'Service Retainer'},
    variables: {
      serviceProviderRepresentative: {type: 'address', subtype: 'participant', validation: {required: true}},
      clientRepresentative: {type: 'address', subtype: 'participant', validation: {required: true}},
      retainerTitle: {type: 'string', validation: {required: true}}
    },
    content: {
      type: 'md',
      data: '# ${variables.retainerTitle}\n\nService agreement between provider and client.'
    },
    execution: {
      initialize: {initialState: 'AWAITING_PAYMENT', data: {}},
      states: {
        AWAITING_PAYMENT: {description: 'Waiting for initial payment proof.'},
        WORK_IN_PROGRESS: {description: 'Provider is performing the service.'}
      },
      inputs: {
        submitInitialPaymentProof: {
          issuer: {type: 'participant', variable: 'clientRepresentative'},
          schema: {paymentReference: {type: 'string', validation: {required: true}}}
        }
      },
      transitions: [
        {
          from: 'AWAITING_PAYMENT',
          to: 'WORK_IN_PROGRESS',
          conditions: [{input: 'submitInitialPaymentProof'}]
        }
      ]
    }
  })
};

fetch('https://test-api.shodai.network/v0/agreements/validate-template', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "data": {
    "templateId": "did:template:service-retainer-v0-1",
    "participantVariableKeys": [
      "serviceProviderRepresentative",
      "clientRepresentative"
    ],
    "inputIds": [
      "submitInitialPaymentProof"
    ],
    "stateIds": [
      "AWAITING_PAYMENT",
      "WORK_IN_PROGRESS"
    ],
    "warnings": []
  },
  "meta": {
    "apiVersion": "v0",
    "requestId": "req_123"
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing API credential",
    "requestId": "<string>",
    "details": "<unknown>"
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing API credential",
    "requestId": "<string>",
    "details": "<unknown>"
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing API credential",
    "requestId": "<string>",
    "details": "<unknown>"
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing API credential",
    "requestId": "<string>",
    "details": "<unknown>"
  }
}