Formance Ledger API

openapi: 3.0.3
info:
  title: Formance Platform Auth Ledger API
  description: Open-source financial infrastructure for money movement. This specification describes the REST surface of the Formance Platform across its modules - Ledger (v2), Payments, Orchestration / Flows (v2), Wallets, Reconciliation, Auth, Webhooks, and Search - as exposed by Formance Cloud. All resource modules are served under a per-module path prefix (for example `/api/ledger`, `/api/payments`) on a single stack host and are secured with OAuth2 client-credentials Bearer tokens issued by the Auth module.
  termsOfService: https://www.formance.com/terms
  contact:
    name: Formance
    url: https://www.formance.com
  license:
    name: MIT
    url: https://github.com/formancehq/ledger/blob/main/LICENSE
  version: v1
servers:
- url: https://{organization}.{environment}.formance.cloud
  description: Formance Cloud stack host
  variables:
    organization:
      default: sandbox
      description: Your organization / stack slug.
    environment:
      default: eu.sandbox
      description: The Formance Cloud environment / region for the stack.
security:
- oauth2: []
tags:
- name: Ledger
  description: Programmable double-entry ledger (v2).
paths:
  /api/ledger/v2:
    get:
      operationId: v2ListLedgers
      tags:
      - Ledger
      summary: List ledgers
      responses:
        '200':
          description: List of ledgers.
  /api/ledger/v2/{ledger}:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2GetLedger
      tags:
      - Ledger
      summary: Get a ledger
      responses:
        '200':
          description: Ledger.
    post:
      operationId: v2CreateLedger
      tags:
      - Ledger
      summary: Create a ledger
      responses:
        '204':
          description: Ledger created.
  /api/ledger/v2/{ledger}/_info:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2GetLedgerInfo
      tags:
      - Ledger
      summary: Get information about a ledger
      responses:
        '200':
          description: Ledger info.
  /api/ledger/v2/{ledger}/_bulk:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    post:
      operationId: v2CreateBulk
      tags:
      - Ledger
      summary: Bulk request
      responses:
        '200':
          description: Bulk result.
  /api/ledger/v2/{ledger}/accounts:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2ListAccounts
      tags:
      - Ledger
      summary: List accounts from a ledger
      responses:
        '200':
          description: Cursor of accounts.
    head:
      operationId: v2CountAccounts
      tags:
      - Ledger
      summary: Count the accounts from a ledger
      responses:
        '204':
          description: Count returned in Count header.
  /api/ledger/v2/{ledger}/accounts/{address}:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    - name: address
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2GetAccount
      tags:
      - Ledger
      summary: Get account by its address
      responses:
        '200':
          description: Account.
  /api/ledger/v2/{ledger}/accounts/{address}/metadata:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    - name: address
      in: path
      required: true
      schema:
        type: string
    post:
      operationId: v2AddMetadataToAccount
      tags:
      - Ledger
      summary: Add metadata to an account
      responses:
        '204':
          description: Metadata added.
  /api/ledger/v2/{ledger}/transactions:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2ListTransactions
      tags:
      - Ledger
      summary: List transactions from a ledger
      responses:
        '200':
          description: Cursor of transactions.
    post:
      operationId: v2CreateTransaction
      tags:
      - Ledger
      summary: Create a new transaction
      description: Post a double-entry transaction to the ledger. Provide either explicit `postings` (source, destination, amount, asset) or a `script` expressed in Numscript to compute complex multi-party money flows.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/V2PostTransaction'
      responses:
        '200':
          description: Transaction created.
    head:
      operationId: v2CountTransactions
      tags:
      - Ledger
      summary: Count the transactions from a ledger
      responses:
        '204':
          description: Count returned in Count header.
  /api/ledger/v2/{ledger}/transactions/{id}:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    - name: id
      in: path
      required: true
      schema:
        type: integer
        format: bigint
    get:
      operationId: v2GetTransaction
      tags:
      - Ledger
      summary: Get transaction by its ID
      responses:
        '200':
          description: Transaction.
  /api/ledger/v2/{ledger}/transactions/{id}/metadata:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    - name: id
      in: path
      required: true
      schema:
        type: integer
        format: bigint
    post:
      operationId: v2AddMetadataOnTransaction
      tags:
      - Ledger
      summary: Set the metadata of a transaction by its ID
      responses:
        '204':
          description: Metadata set.
  /api/ledger/v2/{ledger}/transactions/{id}/revert:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    - name: id
      in: path
      required: true
      schema:
        type: integer
        format: bigint
    post:
      operationId: v2RevertTransaction
      tags:
      - Ledger
      summary: Revert a ledger transaction by its ID
      responses:
        '201':
          description: Reverting transaction created.
  /api/ledger/v2/{ledger}/aggregate/balances:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2GetBalancesAggregated
      tags:
      - Ledger
      summary: Get the aggregated balances from selected accounts
      responses:
        '200':
          description: Aggregated balances.
  /api/ledger/v2/{ledger}/volumes:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2GetVolumesWithBalances
      tags:
      - Ledger
      summary: Get list of volumes with balances for (account/asset)
      responses:
        '200':
          description: Cursor of volumes with balances.
  /api/ledger/v2/{ledger}/logs:
    parameters:
    - name: ledger
      in: path
      required: true
      schema:
        type: string
    get:
      operationId: v2ListLogs
      tags:
      - Ledger
      summary: List the logs from a ledger
      responses:
        '200':
          description: Cursor of logs.
components:
  schemas:
    V2Posting:
      type: object
      required:
      - amount
      - asset
      - destination
      - source
      properties:
        amount:
          type: integer
          format: bigint
          example: 100
        asset:
          type: string
          example: USD/2
        destination:
          type: string
          example: users:001
        source:
          type: string
          example: world
    V2PostTransaction:
      type: object
      properties:
        timestamp:
          type: string
          format: date-time
        postings:
          type: array
          items:
            $ref: '#/components/schemas/V2Posting'
        script:
          type: object
          description: A Numscript program and its variables.
          properties:
            plain:
              type: string
              example: "send [USD/2 100] (\n  source = @world\n  destination = @users:001\n)\n"
            vars:
              type: object
              additionalProperties: true
        reference:
          type: string
        metadata:
          type: object
          additionalProperties:
            type: string
  securitySchemes:
    oauth2:
      type: oauth2
      description: 'OAuth2 client-credentials flow. Exchange a client id and secret at `/api/auth/oauth/token` for a Bearer access token, then send it as `Authorization: Bearer <token>`.'
      flows:
        clientCredentials:
          tokenUrl: https://{organization}.{environment}.formance.cloud/api/auth/oauth/token
          scopes:
            ledger:read: Read ledger resources
            ledger:write: Write ledger resources
            payments:read: Read payments resources
            payments:write: Write payments resources
            wallets:read: Read wallets resources
            wallets:write: Write wallets resources