Errors

Every failure is a TentError, which is exported from tentjs. A query or a change throws it, and a failed action refuses its promise with it.

Member	Holds
`code`	For the framework, `T` and four digits, as `T0002`. For an error of an app's own, the builder's word
`name`	The short word of the code, as `bad-input`. For an error of an app's own, the builder's word again
`message`	What went wrong, in words
`fix`	What to do about it, where that can be said
`where`	`{ file, line, definition }`: the place in the project, where there is one
`fields`	For each field that failed, by its dotted name, what it failed. An entry of a list is named by its number, as `lines.0.qty`

TypeScript

import { TentError } from 'tentjs'

try {
  await refund({ order })
} catch (error) {
  if (error instanceof TentError && error.code === 'T2103') {
    // the order is not there
  }
}

Every code of the framework has a page: tent docs T0002.

What the build and the check report is a finding: the same members, with level, which is 'error', 'warning' or 'note', and docs, the command that explains its code.