Express Rate Check

{
  "Comment": "Express rate check: quickly verify carrier capacity and calculate freight rates before committing to a full booking",
  "StartAt": "SetCheckMeta",
  "States": {
    "SetCheckMeta": {
      "Type": "Pass",
      "Parameters": {
        "checkId.$": "States.Format('RCK-{}', $$.Execution.Name)",
        "channel": "EXPRESS",
        "booking.$": "$"
      },
      "Next": "CheckCarrierCapacity"
    },
    "CheckCarrierCapacity": {
      "Type": "Task",
      "Resource": "${CheckCarrierCapacityFunctionArn}",
      "ResultPath": "$.capacity",
      "Next": "IsCapacityAvailable"
    },
    "IsCapacityAvailable": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.capacity.Payload.isCapacityAvailable",
          "BooleanEquals": true,
          "Next": "CalculateFreightRates"
        }
      ],
      "Default": "RateUnavailable"
    },
    "CalculateFreightRates": {
      "Type": "Task",
      "Resource": "${CalculateFreightRatesFunctionArn}",
      "ResultPath": "$.rates",
      "Next": "RatePropagationDelay"
    },
    "RatePropagationDelay": {
      "Type": "Wait",
      "Seconds": 2,
      "Next": "IsRateCalculated"
    },
    "IsRateCalculated": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.rates.Payload.totalRate",
          "NumericGreaterThan": 0,
          "Next": "RateAvailable"
        }
      ],
      "Default": "RateUnavailable"
    },
    "RateAvailable": {
      "Type": "Succeed"
    },
    "RateUnavailable": {
      "Type": "Fail",
      "Error": "RateUnavailable",
      "Cause": "No rate could be determined for this shipment"
    }
  }
}

{
  "Comment": "Express rate check: quickly verify carrier capacity and calculate freight rates before committing to a full booking",
  "StartAt": "SetCheckMeta",
  "States": {
    "SetCheckMeta": {
      "Type": "Pass",
      "Parameters": {
        "checkId.$": "States.Format('RCK-{}', $$.Execution.Name)",
        "channel": "EXPRESS",
        "booking.$": "$"
      },
      "Next": "CheckCarrierCapacity"
    },
    "CheckCarrierCapacity": {
      "Type": "Task",
      "Resource": "${CheckCarrierCapacityFunctionArn}",
      "ResultPath": "$.capacity",
      "Next": "IsCapacityAvailable"
    },
    "IsCapacityAvailable": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.capacity.Payload.isCapacityAvailable",
          "BooleanEquals": true,
          "Next": "CalculateFreightRates"
        }
      ],
      "Default": "RateUnavailable"
    },
    "CalculateFreightRates": {
      "Type": "Task",
      "Resource": "${CalculateFreightRatesFunctionArn}",
      "ResultPath": "$.rates",
      "Next": "RatePropagationDelay"
    },
    "RatePropagationDelay": {
      "Type": "Wait",
      "Seconds": 2,
      "Next": "IsRateCalculated"
    },
    "IsRateCalculated": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.rates.Payload.totalRate",
          "NumericGreaterThan": 0,
          "Next": "RateAvailable"
        }
      ],
      "Default": "RateUnavailable"
    },
    "RateAvailable": {
      "Type": "Succeed"
    },
    "RateUnavailable": {
      "Type": "Fail",
      "Error": "RateUnavailable",
      "Cause": "No rate could be determined for this shipment"
    }
  }
}