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return 0;
}
break;
case Type.bitList:
return BitList.fromBitfield(Buffer.alloc(0), 0);
case Type.bitVector:
return BitVector.fromBitfield(
Buffer.alloc(Math.max(1, Math.ceil(type.length / 8))),
type.length);
case Type.byteList:
return Buffer.alloc(0);
case Type.byteVector:
return Buffer.alloc(type.length);
case Type.list:
return [];
case Type.vector:
return Array.from({length: type.length}, () =>
defaultValue(type.elementType));
case Type.container:
// eslint-disable-next-line no-case-declarations
const obj = {} as any;
type.fields.forEach(([fieldName, fieldType]) =>
obj[fieldName] = defaultValue(fieldType));
return obj;
}
}
value = defaultValue(type);
}
switch(type.type) {
case Type.uint:
case Type.bool:
case Type.bitList:
case Type.bitVector:
case Type.byteList:
case Type.byteVector:
assertValidValue(type, value);
return value;
case Type.list:
assert(Array.isArray(value));
return value.map((v: any) =>
_createValue(type.elementType, v));
case Type.vector:
assert(Array.isArray(value));
return Array.from({length: type.length}, (_, i) =>
_createValue(type.elementType, value[i]));
case Type.container:
assert(Object(value) === value);
// eslint-disable-next-line no-case-declarations
const obj: Record = {};
type.fields.forEach(([fieldName, fieldType]) => {
obj[fieldName] = _createValue(fieldType, value[fieldName]);
});
return obj;
}
}
}
assert(firstOffset === currentIndex, "First offset skips variable data");
} else {
// all elements fixed-sized
let index = start;
const elementSize = fixedSize(type.elementType);
let nextIndex;
for (; index < end;) {
nextIndex = index + elementSize;
value.push(
_deserialize(data, type.elementType, index, nextIndex)
);
index = nextIndex;
}
}
if (type.type === Type.vector) {
assert(type.length === value.length, "Incorrect deserialized vector length");
}
if (type.type === Type.list) {
assert(type.maxLength >= value.length, "List length greater than max length");
}
return value;
}
export function _serialize(value: SerializableValue, type: FullSSZType, output: Buffer, start: number): number {
switch(type.type) {
case Type.bool:
return _serializeBool(value as Bool, output, start);
case Type.uint:
return _serializeUint(value as Uint, type, output, start);
case Type.bitList:
return _serializeBitList(value as BitList, type, output, start);
case Type.bitVector:
return _serializeBitVector(value as BitVector, type, output, start);
case Type.byteList:
case Type.byteVector:
return _serializeByteArray(value as Bytes, type, output, start);
case Type.list:
case Type.vector:
return _serializeArray(value as SerializableArray, type, output, start);
case Type.container:
return _serializeObject(value as SerializableObject, type, output, start);
}
}
export function chunkCount(type: FullSSZType): number {
switch (type.type) {
case Type.uint:
case Type.bool:
return 1;
case Type.bitList:
return Math.floor((type.maxLength + 255) / 256);
case Type.bitVector:
return Math.floor((type.length + 255) / 256);
case Type.byteList:
return Math.floor((type.maxLength * itemLength(byte) + 31) / 32);
case Type.byteVector:
return Math.floor((type.length * itemLength(byte) + 31) / 32);
case Type.list:
return Math.floor((type.maxLength * itemLength(type.elementType) + 31) / 32);
case Type.vector:
return Math.floor((type.length * itemLength(type.elementType) + 31) / 32);
case Type.container:
return type.fields.length;
default:
throw new Error("unsupported type");
}
}
&& value.toArrayLike(Buffer, type.byteLength).equals(Buffer.alloc(type.byteLength, 255))
) {
return Infinity;
}
return type.useNumber ? value.toNumber() : new BN(value);
case Type.bool:
return value;
case Type.bitList:
return BitList.deserialize(Buffer.from(value.slice(2), "hex"));
case Type.bitVector:
return BitVector.fromBitfield(Buffer.from(value.slice(2), "hex"), type.length);
case Type.byteList:
case Type.byteVector:
return Buffer.from(value.slice(2), "hex");
case Type.list:
case Type.vector:
return value.map((element: any) => _expandYamlValue(element, type.elementType));
case Type.container:
type.fields.forEach(([fieldName, fieldType]) => {
value[fieldName] = _expandYamlValue(value[fieldName], fieldType);
});
return value;
}
}
);
case Type.list:
value = value as SerializableArray;
elementType = type.elementType;
if (isBasicType(elementType)) {
return mixInLength(
merkleize(pack(value, elementType), chunkCount(type)),
value.length
);
} else {
return mixInLength(
merkleize(value.map((v) => _hashTreeRoot(v, elementType)), type.maxLength),
value.length
);
}
case Type.vector:
value = value as SerializableArray;
elementType = type.elementType;
if (isBasicType(elementType)) {
return merkleize(pack(value, elementType));
} else {
return merkleize(value.map((v) => _hashTreeRoot(v, elementType)));
}
case Type.container:
type = type as ContainerType;
return merkleize(
type.fields.map(([fieldName, fieldType]) =>
_hashTreeRoot((value as SerializableObject)[fieldName], fieldType)));
}
}
case Type.uint:
if (BN.isBN(value)) {
return value.clone();
} else {
return value;
}
case Type.bool:
return value;
case Type.bitList:
case Type.bitVector:
return value.clone();
case Type.byteList:
case Type.byteVector:
return (value as Buffer).slice();
case Type.list:
case Type.vector:
return value.map((element: any) => clone(element, type.elementType));
case Type.container:
type.fields.forEach(([fieldName, fieldType]) => {
obj[fieldName] = clone(value[fieldName], fieldType);
});
return obj;
}
}
export function variableSize(type: FullSSZType, value: SerializableValue): number {
switch (type.type) {
case Type.bitList:
return Math.ceil(((value as BitList).bitLength + 1) / 8);
case Type.byteList:
return (value as Bytes).length;
case Type.list:
return (value as SerializableArray)
.map((v) =>
size((type as ListType).elementType, v) +
(isVariableSizeType(type.elementType) ? BYTES_PER_LENGTH_PREFIX : 0))
.reduce((a, b) => a + b, 0);
case Type.vector:
return (value as SerializableArray)
.map((v) =>
size((type as VectorType).elementType, v) +
(isVariableSizeType(type.elementType) ? BYTES_PER_LENGTH_PREFIX : 0))
.reduce((a, b) => a + b, 0);
case Type.container:
return type.fields
.map(([fieldName, fieldType]) =>
size(fieldType, (value as SerializableObject)[fieldName]) +
(isVariableSizeType(fieldType) ? BYTES_PER_LENGTH_PREFIX : 0))
.reduce((a, b) => a + b, 0);
default:
throw new Error("variableSize: invalid type");
}
}
function maxLength(type: BitsType | BytesType | ArrayType): number {
switch (type.type) {
case Type.bitList:
case Type.byteList:
case Type.list:
return type.maxLength;
case Type.bitVector:
case Type.byteVector:
case Type.vector:
return type.length;
default:
throw new Error("");
}
}