returns a Promise yielding a boolean indicating success or failure of the operation.
\n\nAdds or updates the information about a call. The callInfo object must contain (at least) the following properties:\n\n| property | description |\n| ------------- |-------------|\n| callSid | the Call Sid for this call|\n| callId | the SIP Call-ID |\n| sipStatus | the most recent sip status - a value of 100 means this is a new call that should be added|\n| callStatus | one of 'trying', 'ringing', 'early-media', 'in-progress', 'completed', 'failed', 'busy', 'no-answer', or 'queued'|\n\nAdditionally, the `serviceUrl` parameter is required if the sipStatus is 100 (i.e. a new call). It must contain the service endpoint of the specific feature-server instance that is controlling this call.\n\nWhen a call reaches a final state ('completed', 'failed', 'busy', or 'no-answer') the associated call data will be purged one hours later. This database is intended only to be used for live call information.\n\n#### retrieveCallInfo\n`retrieveCallInfo(accountSid, callSid)`\nreturns a Promise yielding the call information as an object.
\n\nRetrieves the call information associated with a given call sid, if available.\n\n```\nconst callInfo = await retrieveCallInfo(accountSid, callSid);\nif (!callInfo) {\n logger.info(`call for ${callSid} not found);\n}\n```\n\n#### listCallInfo\n`listCallInfo(accountSid)`\nreturns a Promise yielding an array of information about calls.
\n\nRetrieves all of the active (or recently-active) calls for an Account.\n\n```\nconst calls = await listCallInfo(accountSid);\n```\n\n#### deleteCall\n`deleteCall(accountSid, callSid)`\nreturns boolean indicating if call was successfully deleted
\n\nDeletes a Call.\n\n```\nconst result = await deleteCall(accountSid, callSid);\n```\n\n#### purgeCalls\n`purgeCalls()`\nreturns number of calls purged
\n\nPurges call data for calls that ended some time ago.\n\n```\nconst countDeleted = await purgeCalls();\n```\n\n#### synthAudio\n`synthAudio({vendor, language, voice, text})`\nreturns the path to a temporary file containing the generated audio
\n\nGenerates audio for text, retrieving previously generated audio from cache if available. Audio is cached for 24 hours.\n\n```\nconst path = await synthAudio({\n vendor: 'aws', \n language: 'en-US', \n voice: 'Amy', \n text: 'This is a test'\n});\n```\n","readmeFilename":"README.md"}