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import { AssertState, Codec, createCodec, metadata } from "../common/mod.ts"
export function transform<TI, UI, TO = TI, UO = UI>(  props: {    $base: Codec<TI, TO>    encode: (value: UI) => TI    decode: (value: TO) => UO    assert?: (this: Codec<UI, UO>, assert: AssertState) => void  },): Codec<UI, UO> {  return createCodec({    _metadata: metadata("$.transform", transform, props),    _staticSize: props.$base._staticSize,    _encode(buffer, value) {      props.$base._encode(buffer, props.encode(value))    },    _decode(buffer) {      return props.decode(props.$base._decode(buffer))    },    _assert(assert) {      props.assert?.call(this, assert)      props.$base._assert(new AssertState(props.encode(assert.value as UI), "#encode", assert))    },  })}