nim-codex/codex/rest/coders.nim

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## Nim-Codex
## Copyright (c) 2022 Status Research & Development GmbH
## Licensed under either of
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
## at your option.
## This file may not be copied, modified, or distributed except according to
## those terms.
import std/sugar
import pkg/presto
import pkg/chronos
import pkg/libp2p
import pkg/stew/base10
import pkg/stew/byteutils
import pkg/stew/results
import pkg/stint
import ../sales
import ../purchasing
proc encodeString*(cid: type Cid): Result[string, cstring] =
ok($cid)
proc decodeString*(T: type Cid, value: string): Result[Cid, cstring] =
Cid
.init(value)
.mapErr do(e: CidError) -> cstring:
case e
of CidError.Incorrect: "Incorrect Cid".cstring
of CidError.Unsupported: "Unsupported Cid".cstring
of CidError.Overrun: "Overrun Cid".cstring
else: "Error parsing Cid".cstring
proc encodeString*(peerId: PeerId): Result[string, cstring] =
ok($peerId)
proc decodeString*(T: type PeerId, value: string): Result[PeerId, cstring] =
PeerId.init(value)
proc encodeString*(address: MultiAddress): Result[string, cstring] =
ok($address)
proc decodeString*(T: type MultiAddress, value: string): Result[MultiAddress, cstring] =
MultiAddress
.init(value)
.mapErr do(e: string) -> cstring: cstring(e)
proc decodeString*(T: type SomeUnsignedInt, value: string): Result[T, cstring] =
Base10.decode(T, value)
proc encodeString*(value: SomeUnsignedInt): Result[string, cstring] =
ok(Base10.toString(value))
proc decodeString*(T: type Duration, value: string): Result[T, cstring] =
let v = ? Base10.decode(uint32, value)
ok(v.minutes)
proc encodeString*(value: Duration): Result[string, cstring] =
ok($value)
proc decodeString*(T: type bool, value: string): Result[T, cstring] =
try:
ok(value.parseBool())
except CatchableError as exc:
let s: cstring = exc.msg
err(s) # err(exc.msg) won't compile
proc encodeString*(value: bool): Result[string, cstring] =
ok($value)
proc decodeString*(_: type UInt256, value: string): Result[UInt256, cstring] =
try:
ok UInt256.fromHex(value)
except ValueError as e:
err e.msg.cstring
proc decodeString*(_: type array[32, byte],
value: string): Result[array[32, byte], cstring] =
try:
ok array[32, byte].fromHex(value)
except ValueError as e:
err e.msg.cstring
proc decodeString*[T: PurchaseId | RequestId | Nonce](_: type T,
value: string): Result[T, cstring] =
array[32, byte].decodeString(value).map(id => T(id))
proc decodeString*(t: typedesc[string],
value: string): Result[string, cstring] =
ok(value)
proc encodeString*(value: string): RestResult[string] =
ok(value)