Error message with blockchain address when adding service fails for did:ethr

[Ajmasta]

Hello,

I finally managed to find some time to work on this. As discussed in 748, I was able to find a method by which an error message with the blockchain address to fund is delivered when an attempt to add a service to a did:ethr fails.

const returnBlockchainId = async (did:string) => {
  //resolves the newly created DID to find the blockchain address
  const resolve = await agent.resolveDid({didUrl:did})
  const document = resolve.didDocument?.verificationMethod
  const blockchainId = document? document[0].blockchainAccountId:""

  return blockchainId
}


async function tryToUpdate (options:IDIDManagerAddServiceArgs) {

  try {
    const result = await agent.didManagerAddService(options)
    console.log("Success!")
    return result
  }
  catch(err){
    
    if (err instanceof Error) {
      
      if (err.message.includes("insufficient funds for intrinsic transaction cost"))
      {
        const address = await returnBlockchainId(options.did)
        console.log("insufficient funds on address:" + address)
      } else{
          console.log(err)                       
      }
    }
  }
}

async function getAndUpdate() {

  const rinkebyAlice = await agent.didManagerGetOrCreate({alias:"testRinkeby"})

  tryToUpdate({
    did: rinkebyAlice.did,
    service: {
      id: 'localhost-useless-endpoint',
      type: 'DIDComm',
      serviceEndpoint: `http://localhost:1/foobar`,
      description: 'endpoint ',
      },
    })


}

getAndUpdate().catch(console.log)