Tcl HMRC VAT MTD: Retrieve VAT Liabilities

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Retrieve VAT liabilities

Documentation: https://developer.service.hmrc.gov.uk/api-documentation/docs/api/service/vat-api/1.0#_retrieve-vat-liabilities_get_accordion

CURL Command

curl -X GET  https://test-api.service.hmrc.gov.uk/organisations/vat/MY_HMRC_VRN/liabilities?from=2018-06-25&to=2019-02-17 \
-H 'Authorization: Bearer HMRC_ACCESS_TOKEN' \
-H 'Accept: application/vnd.hmrc.1.0+json'

Tcl Example

load ./chilkat.dll

set rest [new_CkRest]

#  URL: https://test-api.service.hmrc.gov.uk/organisations/vat/MY_HMRC_VRN/liabilities?from=2018-06-25&to=2019-02-17
set bTls 1
set port 443
set bAutoReconnect 1
set success [CkRest_Connect $rest "test-api.service.hmrc.gov.uk" $port $bTls $bAutoReconnect]
if {[expr $success != 1]} then {
    puts "ConnectFailReason: [CkRest_get_ConnectFailReason $rest]"
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    exit
}

CkRest_AddHeader $rest "Authorization" "Bearer HMRC_ACCESS_TOKEN"
CkRest_AddHeader $rest "Accept" "application/vnd.hmrc.1.0+json"

set sbResponseBody [new_CkStringBuilder]

set success [CkRest_FullRequestNoBodySb $rest "GET" "/organisations/vat/MY_HMRC_VRN/liabilities?from=2018-06-25&to=2019-02-17" $sbResponseBody]
if {[expr $success != 1]} then {
    puts [CkRest_lastErrorText $rest]
    delete_CkRest $rest
    delete_CkStringBuilder $sbResponseBody
    exit
}

set respStatusCode [CkRest_get_ResponseStatusCode $rest]
if {[expr $respStatusCode >= 400]} then {
    puts "Response Status Code = $respStatusCode"
    puts "Response Header:"
    puts [CkRest_responseHeader $rest]
    puts "Response Body:"
    puts [CkStringBuilder_getAsString $sbResponseBody]
    delete_CkRest $rest
    delete_CkStringBuilder $sbResponseBody
    exit
}

set jsonResponse [new_CkJsonObject]

CkJsonObject_LoadSb $jsonResponse $sbResponseBody

#  See the Online Tool for Generating JSON Parse Code

set i 0
set count_i [CkJsonObject_SizeOfArray $jsonResponse "liabilities"]
while {[expr $i < $count_i]} {
    CkJsonObject_put_I $jsonResponse $i
    set taxPeriodFrom [CkJsonObject_stringOf $jsonResponse "liabilities[i].taxPeriod.from"]
    set taxPeriodTo [CkJsonObject_stringOf $jsonResponse "liabilities[i].taxPeriod.to"]
    set type [CkJsonObject_stringOf $jsonResponse "liabilities[i].type"]
    set originalAmount [CkJsonObject_stringOf $jsonResponse "liabilities[i].originalAmount"]
    set outstandingAmount [CkJsonObject_stringOf $jsonResponse "liabilities[i].outstandingAmount"]
    set due [CkJsonObject_stringOf $jsonResponse "liabilities[i].due"]
    set i [expr $i + 1]
}

delete_CkRest $rest
delete_CkStringBuilder $sbResponseBody
delete_CkJsonObject $jsonResponse

Sample JSON Response Body

{
  "liabilities": [
    {
      "taxPeriod": {
        "from": "2018-04-06",
        "to": "2018-07-06"
      },
      "type": "VAT ...",
      "originalAmount": 6000.3,
      "outstandingAmount": 100.51,
      "due": "2018-07-06"
    }
  ]
}