Preview v2

Transaction Preview V2

post

Previews a transaction against the latest network state, and returns the preview receipt. If the node has enabled it, you may be able to also preview against recent network state.

This endpoint supports V2 transactions (and beyond). If you still need to preview V1 transactions, you should use the /preview endpoint instead.

Body
networkstringRequired

The logical name of the network

Example: {{network}}
Responses
200
Transaction preview response
application/json
post
POST /transaction/preview-v2 HTTP/1.1
Host: xrd.nownodes.io
Content-Type: application/json
Accept: */*
Content-Length: 314

{
  "network": "{{network}}",
  "at_ledger_state": {
    "type": "ByStateVersion"
  },
  "preview_transaction": {
    "type": "Compiled"
  },
  "flags": {
    "use_free_credit": true,
    "assume_all_signature_proofs": true,
    "skip_epoch_check": true,
    "disable_auth_checks": true
  },
  "options": {
    "core_api_receipt": true,
    "radix_engine_toolkit_receipt": true,
    "logs": true
  }
}
{
  "at_ledger_state": {
    "state_version": 1,
    "header_summary": {
      "epoch_round": {
        "epoch": 1,
        "round": 1
      },
      "ledger_hashes": {
        "state_tree_hash": "text",
        "transaction_tree_hash": "text",
        "receipt_tree_hash": "text"
      },
      "proposer_timestamp": {
        "unix_timestamp_ms": 1,
        "date_time": "text"
      }
    }
  },
  "receipt": {
    "status": "Succeeded",
    "fee_summary": {
      "execution_cost_units_consumed": 1,
      "finalization_cost_units_consumed": 1,
      "xrd_total_execution_cost": "text",
      "xrd_total_finalization_cost": "text",
      "xrd_total_royalty_cost": "text",
      "xrd_total_storage_cost": "text",
      "xrd_total_tipping_cost": "text"
    },
    "costing_parameters": {
      "execution_cost_unit_price": "text",
      "execution_cost_unit_limit": 1,
      "execution_cost_unit_loan": 1,
      "finalization_cost_unit_price": "text",
      "finalization_cost_unit_limit": 1,
      "xrd_usd_price": "text",
      "xrd_storage_price": "text",
      "xrd_archive_storage_price": "text",
      "tip_proportion": "text"
    },
    "fee_source": {
      "from_vaults": [
        {
          "vault_entity": {
            "entity_type": "GlobalPackage",
            "is_global": true,
            "entity_address": "text"
          },
          "xrd_amount": "text"
        }
      ]
    },
    "fee_destination": {
      "to_proposer": "text",
      "to_validator_set": "text",
      "to_burn": "text",
      "to_royalty_recipients": [
        {
          "royalty_recipient": {
            "entity_type": "GlobalPackage",
            "is_global": true,
            "entity_address": "text"
          },
          "xrd_amount": "text"
        }
      ]
    },
    "state_updates": {
      "deleted_partitions": [
        {
          "entity_type": "GlobalPackage",
          "entity_address": "text",
          "entity_module": "TypeInfo",
          "partition_kind": "Field",
          "partition_number": 1
        }
      ],
      "created_substates": [
        {
          "substate_id": {
            "entity_type": "GlobalPackage",
            "entity_address": "text",
            "entity_module": "TypeInfo",
            "partition_kind": "Field",
            "partition_number": 1,
            "substate_type": "BootLoaderModuleFieldSystemBoot",
            "substate_key": {
              "key_type": "Field",
              "db_sort_key_hex": "text"
            }
          },
          "value": {
            "substate_hex": "text",
            "substate_data_hash": "text",
            "substate_data": {
              "substate_type": "BootLoaderModuleFieldSystemBoot",
              "is_locked": true
            }
          },
          "system_structure": {
            "type": "SystemField"
          }
        }
      ],
      "updated_substates": [
        {
          "substate_id": {
            "entity_type": "GlobalPackage",
            "entity_address": "text",
            "entity_module": "TypeInfo",
            "partition_kind": "Field",
            "partition_number": 1,
            "substate_type": "BootLoaderModuleFieldSystemBoot",
            "substate_key": {
              "key_type": "Field",
              "db_sort_key_hex": "text"
            }
          },
          "new_value": {
            "substate_hex": "text",
            "substate_data_hash": "text",
            "substate_data": {
              "substate_type": "BootLoaderModuleFieldSystemBoot",
              "is_locked": true
            }
          },
          "previous_value": {
            "substate_hex": "text",
            "substate_data_hash": "text",
            "substate_data": {
              "substate_type": "BootLoaderModuleFieldSystemBoot",
              "is_locked": true
            }
          },
          "system_structure": {
            "type": "SystemField"
          }
        }
      ],
      "deleted_substates": [
        {
          "substate_id": {
            "entity_type": "GlobalPackage",
            "entity_address": "text",
            "entity_module": "TypeInfo",
            "partition_kind": "Field",
            "partition_number": 1,
            "substate_type": "BootLoaderModuleFieldSystemBoot",
            "substate_key": {
              "key_type": "Field",
              "db_sort_key_hex": "text"
            }
          },
          "previous_value": {
            "substate_hex": "text",
            "substate_data_hash": "text",
            "substate_data": {
              "substate_type": "BootLoaderModuleFieldSystemBoot",
              "is_locked": true
            }
          },
          "system_structure": {
            "type": "SystemField"
          }
        }
      ],
      "new_global_entities": [
        {
          "entity_type": "GlobalPackage",
          "is_global": true,
          "entity_address": "text"
        }
      ]
    },
    "events": [
      {
        "type": {
          "emitter": {
            "type": "Function"
          },
          "type_reference": {
            "full_type_id": {
              "entity_address": "text",
              "schema_hash": "text",
              "local_type_id": {
                "kind": "WellKnown",
                "id": 1,
                "as_sbor": {
                  "hex": "text",
                  "programmatic_json": null
                }
              }
            }
          },
          "name": "text"
        },
        "data": {
          "hex": "text",
          "programmatic_json": null
        }
      }
    ],
    "next_epoch": {
      "epoch": 1,
      "validators": [
        {
          "address": "text",
          "key": {
            "key_type": "EcdsaSecp256k1",
            "key_hex": "text"
          },
          "stake": "text"
        }
      ],
      "significant_protocol_update_readiness": [
        {
          "readiness_signal_name": "text",
          "signalled_stake": "text"
        }
      ]
    },
    "output": [
      {
        "hex": "text",
        "programmatic_json": null
      }
    ],
    "error_message": "text"
  },
  "radix_engine_toolkit_receipt": {},
  "logs": [
    {
      "level": "text",
      "message": "text"
    }
  ]
}
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