Solana Check Whether an Account Is Rent Exempt

arazzo: 1.0.1
info:
  title: Solana Check Whether an Account Is Rent Exempt
  summary: Read an account's size and lamports, then look up the rent-exempt minimum for that size.
  description: >-
    Solana charges rent against accounts that do not hold a minimum balance for
    their data size, and an account that falls below that threshold can be
    purged. The workflow reads the account to learn how many bytes it occupies
    and how many lamports it currently holds, then asks the cluster for the
    minimum balance required to make an account of exactly that size rent
    exempt, giving the caller both numbers to compare. Every step spells out its
    JSON-RPC request inline so the flow can be read and executed without opening
    the underlying OpenAPI description.
  version: 1.0.0
sourceDescriptions:
- name: accountsApi
  url: ../openapi/solana-accounts-api-openapi.yml
  type: openapi
workflows:
- workflowId: account-rent-exemption
  summary: Compare an account's lamport balance against the rent-exempt minimum for its size.
  description: >-
    Resolves an account's data size and balance, then resolves the rent-exempt
    threshold for that size.
  inputs:
    type: object
    required:
    - address
    properties:
      address:
        type: string
        description: Base58-encoded public key of the account to inspect.
  steps:
  - stepId: readAccount
    description: >-
      Read the account to capture the lamports it holds, the program that owns
      it, and the size of its data, which is what the rent calculation keys on.
    operationId: getAccountInfo
    requestBody:
      contentType: application/json
      payload:
        jsonrpc: "2.0"
        id: 1
        method: getAccountInfo
        params:
        - $inputs.address
        - encoding: base64
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.result.value
      type: jsonpath
    outputs:
      lamports: $response.body#/result/value/lamports
      owner: $response.body#/result/value/owner
      space: $response.body#/result/value/space
      executable: $response.body#/result/value/executable
      rentEpoch: $response.body#/result/value/rentEpoch
  - stepId: rentExemptMinimum
    description: >-
      Look up the minimum lamport balance that makes an account of this exact
      data size rent exempt. Comparing this against the account's lamports tells
      the caller whether the account is safe or needs topping up.
    operationId: getMinimumBalanceForRentExemption
    requestBody:
      contentType: application/json
      payload:
        jsonrpc: "2.0"
        id: 1
        method: getMinimumBalanceForRentExemption
        params:
        - $steps.readAccount.outputs.space
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      minimumLamports: $response.body#/result/value
  outputs:
    lamports: $steps.readAccount.outputs.lamports
    space: $steps.readAccount.outputs.space
    owner: $steps.readAccount.outputs.owner
    rentExemptMinimumLamports: $steps.rentExemptMinimum.outputs.minimumLamports