{
  "openapi": "3.0.3",
  "info": {
    "title": "DChain Node API",
    "version": "0.4.0",
    "description": "API for reading blockchain state, submitting transactions, and using the relay mailbox. All token amounts are in micro-tokens (µT). 1 T = 1 000 000 µT."
  },
  "servers": [{ "url": "/" }],
  "tags": [
    { "name": "chain", "description": "V2 chain-compatible endpoints" },
    { "name": "explorer", "description": "Block explorer read API" },
    { "name": "relay", "description": "Encrypted relay mailbox" }
  ],
  "paths": {
    "/api/netstats": {
      "get": {
        "tags": ["explorer"],
        "summary": "Network statistics",
        "responses": {
          "200": {
            "description": "Aggregate chain stats",
            "content": { "application/json": { "schema": { "$ref": "#/components/schemas/NetStats" } } }
          }
        }
      }
    },
    "/api/blocks": {
      "get": {
        "tags": ["explorer"],
        "summary": "Recent blocks",
        "parameters": [
          { "name": "limit", "in": "query", "schema": { "type": "integer", "default": 20, "maximum": 100 } }
        ],
        "responses": {
          "200": {
            "description": "Array of recent block summaries",
            "content": { "application/json": { "schema": { "type": "array", "items": { "$ref": "#/components/schemas/BlockSummary" } } } }
          }
        }
      }
    },
    "/api/block/{index}": {
      "get": {
        "tags": ["explorer"],
        "summary": "Block by index",
        "parameters": [
          { "name": "index", "in": "path", "required": true, "schema": { "type": "integer", "format": "uint64" } }
        ],
        "responses": {
          "200": { "description": "Block detail", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/BlockDetail" } } } },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/txs/recent": {
      "get": {
        "tags": ["explorer"],
        "summary": "Recent transactions",
        "parameters": [
          { "name": "limit", "in": "query", "schema": { "type": "integer", "default": 20, "maximum": 100 } }
        ],
        "responses": {
          "200": {
            "description": "Recent transactions",
            "content": { "application/json": { "schema": { "type": "array", "items": { "$ref": "#/components/schemas/TxListEntry" } } } }
          }
        }
      }
    },
    "/api/tx/{txid}": {
      "get": {
        "tags": ["explorer"],
        "summary": "Transaction by ID",
        "parameters": [
          { "name": "txid", "in": "path", "required": true, "schema": { "type": "string" } }
        ],
        "responses": {
          "200": { "description": "Transaction detail", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/TxDetail" } } } },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/tx": {
      "post": {
        "tags": ["explorer"],
        "summary": "Submit a signed transaction",
        "requestBody": {
          "required": true,
          "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Transaction" } } }
        },
        "responses": {
          "200": { "description": "Accepted", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/SubmitTransactionResponse" } } } },
          "400": { "$ref": "#/components/responses/Error" },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/address/{addr}": {
      "get": {
        "tags": ["explorer"],
        "summary": "Address balance and transactions",
        "description": "Accepts a DC... wallet address or hex Ed25519 public key.",
        "parameters": [
          { "name": "addr", "in": "path", "required": true, "schema": { "type": "string" }, "description": "DC... address or hex pub key" },
          { "name": "limit", "in": "query", "schema": { "type": "integer", "default": 50 } },
          { "name": "offset", "in": "query", "schema": { "type": "integer", "default": 0 } }
        ],
        "responses": {
          "200": { "description": "Address detail", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/AddressDetail" } } } },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/node/{pubkey}": {
      "get": {
        "tags": ["explorer"],
        "summary": "Node reputation and stats",
        "parameters": [
          { "name": "pubkey", "in": "path", "required": true, "schema": { "type": "string" }, "description": "Hex Ed25519 pub key or DC... address" },
          { "name": "window", "in": "query", "schema": { "type": "integer", "default": 200 }, "description": "Number of recent blocks to scan for rewards" }
        ],
        "responses": {
          "200": { "description": "Node stats", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/NodeStats" } } } },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/api/relays": {
      "get": {
        "tags": ["explorer"],
        "summary": "Registered relay nodes",
        "description": "Returns all nodes that have submitted an REGISTER_RELAY transaction.",
        "responses": {
          "200": {
            "description": "List of relay nodes",
            "content": { "application/json": { "schema": { "type": "array", "items": { "$ref": "#/components/schemas/RegisteredRelayInfo" } } } }
          }
        }
      }
    },
    "/api/validators": {
      "get": {
        "tags": ["explorer"],
        "summary": "Active validator set",
        "description": "Returns the current on-chain validator set. The set changes via ADD_VALIDATOR / REMOVE_VALIDATOR transactions.",
        "responses": {
          "200": {
            "description": "Active validators",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "count": { "type": "integer" },
                    "validators": {
                      "type": "array",
                      "items": {
                        "type": "object",
                        "properties": {
                          "pub_key": { "type": "string" },
                          "address": { "type": "string" }
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/api/identity/{pubkey}": {
      "get": {
        "tags": ["explorer"],
        "summary": "Identity info (Ed25519 + X25519 keys)",
        "description": "Returns identity info for a pub key or DC address. x25519_pub is populated only if the identity has submitted a REGISTER_KEY transaction with an X25519 key.",
        "parameters": [
          { "name": "pubkey", "in": "path", "required": true, "schema": { "type": "string" }, "description": "Hex Ed25519 pub key or DC... address" }
        ],
        "responses": {
          "200": { "description": "Identity info", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/IdentityInfo" } } } },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/relay/send": {
      "post": {
        "tags": ["relay"],
        "summary": "Send an encrypted message via the relay node",
        "description": "The relay node seals the message using its own X25519 keypair (sender = relay node) and broadcasts it on gossipsub. No on-chain fee is attached.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["recipient_pub", "msg_b64"],
                "properties": {
                  "recipient_pub": { "type": "string", "description": "Hex X25519 public key of the recipient" },
                  "msg_b64": { "type": "string", "description": "Base64-encoded plaintext message" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Message sent",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "id": { "type": "string", "description": "Envelope ID" },
                    "recipient_pub": { "type": "string" },
                    "status": { "type": "string", "example": "sent" }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/Error" },
          "503": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/relay/broadcast": {
      "post": {
        "tags": ["relay"],
        "summary": "Broadcast a pre-sealed envelope",
        "description": "Light clients that seal their own NaCl-box envelopes use this to publish without a direct libp2p connection. The node stores it in the mailbox and gossips it.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["envelope"],
                "properties": {
                  "envelope": { "$ref": "#/components/schemas/Envelope" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Broadcast accepted",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "id": { "type": "string" },
                    "status": { "type": "string", "example": "broadcast" }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/Error" },
          "503": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/relay/inbox": {
      "get": {
        "tags": ["relay"],
        "summary": "List inbox envelopes",
        "description": "Returns envelopes stored for the given X25519 public key. Envelopes remain encrypted — the relay cannot read them.",
        "parameters": [
          { "name": "pub", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Hex X25519 public key of the recipient" },
          { "name": "since", "in": "query", "schema": { "type": "integer", "format": "int64" }, "description": "Unix timestamp — return only messages after this time" },
          { "name": "limit", "in": "query", "schema": { "type": "integer", "default": 50 } }
        ],
        "responses": {
          "200": {
            "description": "Inbox contents",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "pub": { "type": "string" },
                    "count": { "type": "integer" },
                    "has_more": { "type": "boolean" },
                    "items": { "type": "array", "items": { "$ref": "#/components/schemas/InboxItem" } }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/relay/inbox/count": {
      "get": {
        "tags": ["relay"],
        "summary": "Count inbox envelopes",
        "parameters": [
          { "name": "pub", "in": "query", "required": true, "schema": { "type": "string" } }
        ],
        "responses": {
          "200": {
            "description": "Envelope count",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "pub": { "type": "string" },
                    "count": { "type": "integer" }
                  }
                }
              }
            }
          }
        }
      }
    },
    "/relay/inbox/{envID}": {
      "delete": {
        "tags": ["relay"],
        "summary": "Delete an envelope from the inbox",
        "parameters": [
          { "name": "envID", "in": "path", "required": true, "schema": { "type": "string" } },
          { "name": "pub", "in": "query", "required": true, "schema": { "type": "string" }, "description": "X25519 pub key of the inbox owner" }
        ],
        "responses": {
          "200": {
            "description": "Deleted",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "id": { "type": "string" },
                    "status": { "type": "string", "example": "deleted" }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/relay/contacts": {
      "get": {
        "tags": ["relay"],
        "summary": "Incoming contact requests",
        "description": "Returns all CONTACT_REQUEST records for the given Ed25519 pub key, including pending, accepted, and blocked.",
        "parameters": [
          { "name": "pub", "in": "query", "required": true, "schema": { "type": "string" }, "description": "Hex Ed25519 pub key" }
        ],
        "responses": {
          "200": {
            "description": "Contact list",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "pub": { "type": "string" },
                    "count": { "type": "integer" },
                    "contacts": { "type": "array", "items": { "$ref": "#/components/schemas/ContactInfo" } }
                  }
                }
              }
            }
          },
          "400": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/v2/chain/accounts/{account_id}/transactions": {
      "get": {
        "tags": ["chain"],
        "summary": "Account transactions",
        "parameters": [
          { "name": "account_id", "in": "path", "required": true, "schema": { "type": "string" } },
          { "name": "limit", "in": "query", "schema": { "type": "integer", "default": 100, "minimum": 1, "maximum": 1000 } },
          { "name": "order", "in": "query", "schema": { "type": "string", "enum": ["desc", "asc"], "default": "desc" } },
          { "name": "after_block", "in": "query", "schema": { "type": "integer", "format": "uint64" } },
          { "name": "before_block", "in": "query", "schema": { "type": "integer", "format": "uint64" } }
        ],
        "responses": {
          "200": { "description": "Transactions", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ChainTransactionsResponse" } } } },
          "400": { "$ref": "#/components/responses/Error" },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/v2/chain/transactions/{tx_id}": {
      "get": {
        "tags": ["chain"],
        "summary": "Transaction by ID",
        "parameters": [
          { "name": "tx_id", "in": "path", "required": true, "schema": { "type": "string" } }
        ],
        "responses": {
          "200": { "description": "Transaction detail", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ChainTransactionDetailResponse" } } } },
          "404": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/v2/chain/transactions": {
      "post": {
        "tags": ["chain"],
        "summary": "Submit transaction",
        "requestBody": {
          "required": true,
          "content": { "application/json": { "schema": { "$ref": "#/components/schemas/SubmitTransactionRequest" } } }
        },
        "responses": {
          "200": { "description": "Accepted", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/SubmitTransactionResponse" } } } },
          "400": { "$ref": "#/components/responses/Error" },
          "500": { "$ref": "#/components/responses/Error" }
        }
      }
    },
    "/v2/chain/transactions/draft": {
      "post": {
        "tags": ["chain"],
        "summary": "Build unsigned TRANSFER draft",
        "requestBody": {
          "required": true,
          "content": { "application/json": { "schema": { "$ref": "#/components/schemas/DraftTransactionRequest" } } }
        },
        "responses": {
          "200": { "description": "Draft", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/DraftTransactionResponse" } } } },
          "400": { "$ref": "#/components/responses/Error" }
        }
      }
    }
  },
  "components": {
    "responses": {
      "Error": {
        "description": "Error response",
        "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } }
      }
    },
    "schemas": {
      "ErrorResponse": {
        "type": "object",
        "properties": { "error": { "type": "string" } },
        "required": ["error"]
      },
      "NetStats": {
        "type": "object",
        "properties": {
          "height": { "type": "integer" },
          "total_txs": { "type": "integer" },
          "total_transfers": { "type": "integer" },
          "total_relay_proofs": { "type": "integer" },
          "avg_block_time_ms": { "type": "number" },
          "tps": { "type": "number" },
          "total_supply_ut": { "type": "integer", "format": "uint64" }
        }
      },
      "BlockSummary": {
        "type": "object",
        "properties": {
          "index": { "type": "integer", "format": "uint64" },
          "hash": { "type": "string" },
          "time": { "type": "string", "format": "date-time" },
          "validator": { "type": "string", "description": "DC... address" },
          "tx_count": { "type": "integer" },
          "total_fees_ut": { "type": "integer", "format": "uint64" }
        }
      },
      "BlockDetail": {
        "allOf": [
          { "$ref": "#/components/schemas/BlockSummary" },
          {
            "type": "object",
            "properties": {
              "prev_hash": { "type": "string" },
              "validator_addr": { "type": "string" },
              "transactions": {
                "type": "array",
                "items": {
                  "type": "object",
                  "properties": {
                    "id": { "type": "string" },
                    "type": { "type": "string" },
                    "from": { "type": "string" },
                    "to": { "type": "string" },
                    "amount_ut": { "type": "integer", "format": "uint64" },
                    "fee_ut": { "type": "integer", "format": "uint64" }
                  }
                }
              }
            }
          }
        ]
      },
      "TxListEntry": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "type": { "type": "string", "enum": ["TRANSFER","REGISTER_KEY","RELAY_PROOF","REGISTER_RELAY","CONTACT_REQUEST","ACCEPT_CONTACT","BLOCK_CONTACT","ADD_VALIDATOR","REMOVE_VALIDATOR","HEARTBEAT","BIND_WALLET","SLASH","OPEN_PAY_CHAN","CLOSE_PAY_CHAN","BLOCK_REWARD"] },
          "from": { "type": "string" },
          "from_addr": { "type": "string" },
          "to": { "type": "string" },
          "to_addr": { "type": "string" },
          "amount_ut": { "type": "integer", "format": "uint64" },
          "amount": { "type": "string", "description": "Human-readable token amount" },
          "fee_ut": { "type": "integer", "format": "uint64" },
          "fee": { "type": "string" },
          "time": { "type": "string", "format": "date-time" },
          "block_index": { "type": "integer", "format": "uint64" },
          "block_hash": { "type": "string" }
        }
      },
      "TxDetail": {
        "allOf": [
          { "$ref": "#/components/schemas/TxListEntry" },
          {
            "type": "object",
            "properties": {
              "block_time": { "type": "string", "format": "date-time" },
              "payload": { "description": "Decoded payload JSON (type-specific)" },
              "payload_hex": { "type": "string" },
              "signature_hex": { "type": "string" }
            }
          }
        ]
      },
      "AddressDetail": {
        "type": "object",
        "properties": {
          "address": { "type": "string" },
          "pub_key": { "type": "string" },
          "balance_ut": { "type": "integer", "format": "uint64" },
          "balance": { "type": "string" },
          "tx_count": { "type": "integer" },
          "offset": { "type": "integer" },
          "limit": { "type": "integer" },
          "has_more": { "type": "boolean" },
          "next_offset": { "type": "integer" },
          "transactions": { "type": "array", "items": { "$ref": "#/components/schemas/TxListEntry" } }
        }
      },
      "NodeStats": {
        "type": "object",
        "properties": {
          "pub_key": { "type": "string" },
          "address": { "type": "string" },
          "node_balance_ut": { "type": "integer", "format": "uint64" },
          "node_balance": { "type": "string" },
          "wallet_binding_address": { "type": "string" },
          "wallet_binding_balance_ut": { "type": "integer", "format": "uint64" },
          "reputation_score": { "type": "integer", "format": "int64" },
          "reputation_rank": { "type": "string", "enum": ["Observer","Active","Trusted","Validator"] },
          "blocks_produced": { "type": "integer", "format": "uint64" },
          "relay_proofs": { "type": "integer", "format": "uint64" },
          "slash_count": { "type": "integer", "format": "uint64" },
          "heartbeats": { "type": "integer", "format": "uint64" },
          "recent_window_blocks": { "type": "integer" },
          "recent_blocks_produced": { "type": "integer" },
          "recent_rewards_ut": { "type": "integer", "format": "uint64" },
          "recent_rewards": { "type": "string" }
        }
      },
      "IdentityInfo": {
        "type": "object",
        "properties": {
          "pub_key": { "type": "string", "description": "Hex Ed25519 public key" },
          "address": { "type": "string", "description": "DC... wallet address" },
          "x25519_pub": { "type": "string", "description": "Hex Curve25519 public key for E2E encryption; empty if not published" },
          "nickname": { "type": "string" },
          "registered": { "type": "boolean", "description": "true if REGISTER_KEY tx was committed" }
        }
      },
      "RegisteredRelayInfo": {
        "type": "object",
        "properties": {
          "pub_key": { "type": "string" },
          "address": { "type": "string" },
          "relay": {
            "type": "object",
            "properties": {
              "x25519_pub_key": { "type": "string" },
              "fee_per_msg_ut": { "type": "integer", "format": "uint64" },
              "multiaddr": { "type": "string" }
            }
          }
        }
      },
      "Envelope": {
        "type": "object",
        "description": "NaCl-box sealed message envelope. Only the holder of the recipient's X25519 private key can decrypt it.",
        "required": ["id", "recipient_pub", "sender_pub", "nonce", "ciphertext"],
        "properties": {
          "id": { "type": "string", "description": "Hex SHA-256[:16] of nonce||ciphertext" },
          "recipient_pub": { "type": "string", "description": "Hex X25519 public key of the recipient" },
          "sender_pub": { "type": "string", "description": "Hex X25519 public key of the sender" },
          "sender_ed25519_pub": { "type": "string", "description": "Sender's Ed25519 pub key for on-chain fee claims" },
          "fee_ut": { "type": "integer", "format": "uint64", "description": "Delivery fee µT (0 = free)" },
          "fee_sig": { "type": "string", "format": "byte", "description": "Ed25519 sig over FeeAuthBytes(id, fee_ut)" },
          "nonce": { "type": "string", "format": "byte", "description": "24-byte NaCl nonce (base64)" },
          "ciphertext": { "type": "string", "format": "byte", "description": "NaCl box ciphertext (base64)" },
          "sent_at": { "type": "integer", "format": "int64", "description": "Unix timestamp" }
        }
      },
      "InboxItem": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "sender_pub": { "type": "string" },
          "recipient_pub": { "type": "string" },
          "fee_ut": { "type": "integer", "format": "uint64" },
          "sent_at": { "type": "integer", "format": "int64" },
          "sent_at_human": { "type": "string", "format": "date-time" },
          "nonce": { "type": "string", "format": "byte" },
          "ciphertext": { "type": "string", "format": "byte" }
        }
      },
      "ContactInfo": {
        "type": "object",
        "properties": {
          "requester_pub": { "type": "string" },
          "requester_addr": { "type": "string" },
          "status": { "type": "string", "enum": ["pending", "accepted", "blocked"] },
          "intro": { "type": "string", "description": "Optional plaintext intro (≤ 280 chars)" },
          "fee_ut": { "type": "integer", "format": "uint64" },
          "tx_id": { "type": "string" },
          "created_at": { "type": "integer", "format": "int64" }
        }
      },
      "Transaction": {
        "type": "object",
        "description": "Signed blockchain transaction. Sign the canonical JSON of the object with Signature set to null, using Ed25519.",
        "required": ["type", "from"],
        "properties": {
          "id": { "type": "string" },
          "type": { "type": "string", "enum": ["TRANSFER","REGISTER_KEY","RELAY_PROOF","REGISTER_RELAY","CONTACT_REQUEST","ACCEPT_CONTACT","BLOCK_CONTACT","ADD_VALIDATOR","REMOVE_VALIDATOR","HEARTBEAT","BIND_WALLET","SLASH","OPEN_PAY_CHAN","CLOSE_PAY_CHAN"] },
          "from": { "type": "string", "description": "Hex Ed25519 pub key of the signer" },
          "to": { "type": "string", "description": "Hex Ed25519 pub key of the recipient (if applicable)" },
          "amount": { "type": "integer", "format": "uint64", "description": "µT to transfer (TRANSFER, CONTACT_REQUEST)" },
          "fee": { "type": "integer", "format": "uint64", "description": "µT fee to block validator (min 1000)" },
          "memo": { "type": "string" },
          "payload": { "type": "string", "format": "byte", "description": "Base64 JSON payload (type-specific)" },
          "signature": { "type": "string", "format": "byte", "description": "Ed25519 signature over canonical bytes" },
          "timestamp": { "type": "string", "format": "date-time" }
        }
      },
      "SubmitTransactionRequest": {
        "type": "object",
        "properties": {
          "tx": { "$ref": "#/components/schemas/Transaction" },
          "signed_tx": { "type": "string", "description": "Signed transaction as JSON/base64/hex string" }
        }
      },
      "DraftTransactionRequest": {
        "type": "object",
        "required": ["from", "to", "amount_ut"],
        "properties": {
          "from": { "type": "string" },
          "to": { "type": "string" },
          "amount_ut": { "type": "integer", "format": "uint64" },
          "memo": { "type": "string" },
          "fee_ut": { "type": "integer", "format": "uint64", "description": "Optional; defaults to MinFee (1000 µT)" }
        }
      },
      "DraftTransactionResponse": {
        "type": "object",
        "properties": {
          "tx": { "$ref": "#/components/schemas/Transaction" },
          "sign_bytes_hex": { "type": "string" },
          "sign_bytes_base64": { "type": "string" },
          "note": { "type": "string" }
        },
        "required": ["tx", "sign_bytes_hex", "sign_bytes_base64"]
      },
      "SubmitTransactionResponse": {
        "type": "object",
        "properties": {
          "status": { "type": "string" },
          "id": { "type": "string" }
        },
        "required": ["status", "id"]
      },
      "ChainTx": {
        "type": "object",
        "properties": {
          "id": { "type": "string" },
          "type": { "type": "string" },
          "memo": { "type": "string" },
          "from": { "type": "string" },
          "from_addr": { "type": "string" },
          "to": { "type": "string" },
          "to_addr": { "type": "string" },
          "amount_ut": { "type": "integer", "format": "uint64" },
          "fee_ut": { "type": "integer", "format": "uint64" },
          "block_index": { "type": "integer", "format": "uint64" },
          "block_hash": { "type": "string" },
          "time": { "type": "string", "format": "date-time" }
        }
      },
      "ChainTransactionsResponse": {
        "type": "object",
        "properties": {
          "account_id": { "type": "string" },
          "account_addr": { "type": "string" },
          "count": { "type": "integer" },
          "order": { "type": "string" },
          "limit_applied": { "type": "integer" },
          "transactions": { "type": "array", "items": { "$ref": "#/components/schemas/ChainTx" } }
        }
      },
      "ChainTransactionDetailResponse": {
        "type": "object",
        "properties": {
          "tx": { "$ref": "#/components/schemas/ChainTx" },
          "payload": {},
          "payload_hex": { "type": "string" },
          "signature_hex": { "type": "string" }
        }
      }
    }
  }
}