Functions/Invoke-GDAXRequest.ps1
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function Invoke-GDAXRequest { Param ( [Parameter()] $Request ) $EpochStart = Get-Date -Date "01/01/1970" $Now = Get-Date $Timestamp = (New-TimeSpan -Start $EpochStart -End $Now.ToUniversalTime()).TotalSeconds $Timestamp = ([math]::Round($Timestamp, 3)).ToString() $Prehash = $Timestamp + $request.method.ToUpper() + $request.url + $request.body $Signature_b64 = Get-HMAC -Message $prehash -Secret $request.secret $Header = @{ "CB-ACCESS-KEY" = $request.key "CB-ACCESS-SIGN" = $signature_b64 "CB-ACCESS-TIMESTAMP" = $Timestamp "CB-ACCESS-PASSPHRASE" = $request.passphrase "Content-Type" = 'application/json' } $Uri = $request.endpoint + $request.url if ($request.method.ToUpper() -eq 'POST') { try {$response = Invoke-RestMethod -Method $request.method -Uri $uri -Headers $header -Body $request.body} catch {$Statuscode = $_.exception.message} } else { try {$response = Invoke-RestMethod -Method $request.method -Uri $uri -Headers $header} catch {$Statuscode = $_.exception.message} } if ($Statuscode) { $Errorcode = $Statuscode | Select-String -Pattern '\d{3,3}' $Errorcode = $Errorcode.Matches.Value Switch ($Errorcode) { '400' {Write-Error "Bad Request. Invalid request format"} '401' {Write-Error "Unauthorized. Invalid API Key"} '403' {Write-Error "Forbidden. You do not have access to the requested resource"} '404' {Write-Error "Not Found"} '500' {Write-Error "Internal Server Error"} } } Return $response } function Get-HMAC { Param( [Parameter()] $Message, [Parameter()] $Secret ) $hmacsha = New-Object System.Security.Cryptography.HMACSHA256 $hmacsha.key = [Convert]::FromBase64String($secret) $signature = $hmacsha.ComputeHash([Text.Encoding]::ASCII.GetBytes($message)) $signature = [Convert]::ToBase64String($signature) return $signature } Function Get-BlankAPI { $api = @{ "endpoint" = 'https://api.gdax.com' "url" = '' "method" = '' "body" = '' "key" = '' "secret" = '' "passphrase" = '' } Return $api } |