Errors

Class	Thrown when	Fields
`ArrektaError`	the node or gateway returns an error (RFC 9457 `application/problem+json`)	`status`, `code`, `title`, `detail`
`DecodeError`	bytes don't decode (bad transaction, PST, address, …)	message
`ValidationError`	a local check fails before anything is sent	`code`

Branch on code, never on the message: codes are stable and each has a page in the error code reference.

import { ArrektaError, sendTransaction } from 'arrekta-sdk'
 
try {
  await sendTransaction(client, { tx })
} catch (e) {
  if (e instanceof ArrektaError && e.code === 'insufficient-fee') {
    // a conflicting transaction pays more: bump the fee
  } else throw e
}

HTTP status	Meaning
400	bad encoding or address
404	not found
409	rejected by mempool policy
422	consensus rule violated
429	rate limited

See the error model.