import # Standard library std/[tables, json, typetraits], # Nimble packages stew/byteutils, ssz/types, json_rpc/jsonmarshal, # Local modules spec/[datatypes, crypto, digest] proc toJsonHex(data: openArray[byte]): string = # Per the eth2 API spec, hex arrays are printed with leading 0x "0x" & toHex(data) proc fromJson*(n: JsonNode, argName: string, result: var ValidatorPubKey) = n.kind.expect(JString, argName) result = initPubKey(ValidatorPubKey.fromHex(n.getStr()).tryGet().initPubKey()) proc `%`*(pubkey: ValidatorPubKey): JsonNode = newJString(toJsonHex(toRaw(pubkey))) proc fromJson*(n: JsonNode, argName: string, result: var List) = fromJson(n, argName, asSeq result) proc `%`*(list: List): JsonNode = %(asSeq(list)) proc fromJson*(n: JsonNode, argName: string, result: var BitList) = fromJson(n, argName, seq[byte](BitSeq(result))) proc `%`*(bitlist: BitList): JsonNode = %(seq[byte](BitSeq(bitlist))) proc fromJson*(n: JsonNode, argName: string, result: var ValidatorSig) = n.kind.expect(JString, argName) result = ValidatorSig.fromHex(n.getStr()).tryGet() proc `%`*(value: ValidatorSig): JsonNode = newJString(toJsonHex(toRaw(value))) proc fromJson*(n: JsonNode, argName: string, result: var Version) = n.kind.expect(JString, argName) hexToByteArray(n.getStr(), array[4, byte](result)) proc `%`*(value: Version): JsonNode = newJString(toJsonHex(distinctBase(value))) template genFromJsonForIntType(T: untyped) = proc fromJson*(n: JsonNode, argName: string, result: var T) = n.kind.expect(JInt, argName) let asInt = n.getBiggestInt() when T is Epoch: if asInt == -1: # TODO: This is a major hack here. Since the json library # cannot handle properly 0xffffffff when serializing and # deserializing uint64 values, we detect one known wrong # result, appering in most `Validator` records. To fix # this issue, we'll have to switch to nim-json-serialization # in nim-json-rpc or work towards implementing a fix upstream. result = FAR_FUTURE_EPOCH return if asInt < 0: # signed -> unsigned conversions are unchecked # https://github.com/nim-lang/RFCs/issues/175 raise newException( ValueError, "JSON-RPC input is an unexpected negative value") result = T(asInt) genFromJsonForIntType(Epoch) genFromJsonForIntType(Slot) genFromJsonForIntType(CommitteeIndex) genFromJsonForIntType(ValidatorIndex) proc `%`*(value: GraffitiBytes): JsonNode = newJString(toJsonHex(distinctBase(value))) proc fromJson*(n: JsonNode, argName: string, value: var GraffitiBytes) = n.kind.expect(JString, argName) value = GraffitiBytes.init n.getStr() proc `%`*(value: CommitteeIndex): JsonNode = newJInt(value.BiggestInt) proc `%`*(value: ValidatorIndex): JsonNode = newJInt(value.BiggestInt) proc `%`*(value: Eth2Digest): JsonNode = newJString(toJsonHex(value.data)) proc fromJson*(n: JsonNode, argName: string, result: var Eth2Digest) = n.kind.expect(JString, argName) hexToByteArray(n.getStr(), result.data)