/
from-layout.ts
563 lines (536 loc) · 16.2 KB
/
from-layout.ts
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import {
GenericProvableExtended,
primitiveTypeMap,
primitiveTypes,
} from './generic.js';
export { ProvableFromLayout, GenericLayout };
type GenericTypeMap<
Field,
Bool,
UInt32,
UInt64,
Sign,
PublicKey,
AuthRequired,
AuthorizationKind,
TokenId
> = {
Field: Field;
Bool: Bool;
UInt32: UInt32;
UInt64: UInt64;
Sign: Sign;
PublicKey: PublicKey;
AuthRequired: AuthRequired;
AuthorizationKind: AuthorizationKind;
TokenId: TokenId;
};
type AnyTypeMap = GenericTypeMap<any, any, any, any, any, any, any, any, any>;
type TypeMapValues<TypeMap extends AnyTypeMap, JsonMap extends AnyTypeMap> = {
[K in keyof TypeMap & keyof JsonMap]: GenericProvableExtended<
TypeMap[K],
JsonMap[K],
TypeMap['Field']
>;
};
function ProvableFromLayout<
TypeMap extends AnyTypeMap,
JsonMap extends AnyTypeMap
>(
TypeMap: TypeMapValues<TypeMap, JsonMap>,
customTypes: Record<
string,
GenericProvableExtended<any, any, TypeMap['Field']>
>
) {
type Field = TypeMap['Field'];
const Field = TypeMap.Field;
type HashInput = { fields?: Field[]; packed?: [Field, number][] };
type Layout = GenericLayout<TypeMap>;
const PrimitiveMap = primitiveTypeMap<Field>();
function provableFromLayout<T, TJson>(typeData: Layout) {
return {
sizeInFields(): number {
return sizeInFields(typeData);
},
toFields(value: T): Field[] {
return toFields(typeData, value);
},
toAuxiliary(value?: T): any[] {
return toAuxiliary(typeData, value);
},
fromFields(fields: Field[], aux: any[]): T {
return fromFields(typeData, fields, aux);
},
toJSON(value: T): TJson {
return toJSON(typeData, value);
},
fromJSON(json: TJson): T {
return fromJSON(typeData, json);
},
check(value: T): void {
check(typeData, value);
},
toInput(value: T): HashInput {
return toInput(typeData, value);
},
emptyValue(): T {
return emptyValue(typeData);
},
};
}
function toJSON(typeData: Layout, value: any) {
return layoutFold<any, any>(
{
map(type, value) {
return type.toJSON(value);
},
reduceArray(array) {
return array;
},
reduceObject(_, object) {
return object;
},
reduceFlaggedOption({ isSome, value }) {
return isSome ? value : null;
},
reduceOrUndefined(value) {
return value ?? null;
},
},
typeData,
value
);
}
function fromJSON(typeData: Layout, json: any): any {
let { checkedTypeName } = typeData;
if (checkedTypeName) {
// there's a custom type!
return customTypes[checkedTypeName].fromJSON(json);
}
if (typeData.type === 'array') {
let arrayTypeData = typeData as ArrayLayout<TypeMap>;
return json.map((json: any) => fromJSON(arrayTypeData.inner, json));
}
if (typeData.type === 'option') {
let optionTypeData = typeData as OptionLayout<TypeMap>;
switch (optionTypeData.optionType) {
case 'closedInterval':
case 'flaggedOption': {
let isSome = TypeMap.Bool.fromJSON(json !== null);
let value;
if (json !== null) {
value = fromJSON(optionTypeData.inner, json);
} else {
value = emptyValue(optionTypeData.inner);
if (optionTypeData.optionType === 'closedInterval') {
let innerInner = optionTypeData.inner.entries.lower;
let innerType =
TypeMap[innerInner.type as keyof TypeMap & keyof JsonMap];
value.lower = innerType.fromJSON(optionTypeData.rangeMin);
value.upper = innerType.fromJSON(optionTypeData.rangeMax);
}
}
return { isSome, value };
}
case 'orUndefined': {
return json === null
? undefined
: fromJSON(optionTypeData.inner, json);
}
default:
throw Error('bug');
}
}
if (typeData.type === 'object') {
let { keys, entries } = typeData as ObjectLayout<TypeMap>;
let values: Record<string, any> = {};
for (let i = 0; i < keys.length; i++) {
let typeEntry = entries[keys[i]];
values[keys[i]] = fromJSON(typeEntry, json[keys[i]]);
}
return values;
}
if (primitiveTypes.has(typeData.type as string)) {
return (PrimitiveMap as any)[typeData.type].fromJSON(json);
}
return (TypeMap as any)[typeData.type].fromJSON(json);
}
function toFields(typeData: Layout, value: any) {
return layoutFold<any, Field[]>(
{
map(type, value) {
return type.toFields(value);
},
reduceArray(array) {
return array!.flat();
},
reduceObject(keys, object) {
return keys.map((key) => object![key]).flat();
},
reduceFlaggedOption({ isSome, value }) {
return [isSome, value].flat();
},
reduceOrUndefined(_) {
return [];
},
},
typeData,
value
);
}
function toAuxiliary(typeData: Layout, value?: any) {
return layoutFold<any, any[]>(
{
map(type, value) {
return type.toAuxiliary(value);
},
reduceArray(array) {
return array;
},
reduceObject(keys, object) {
return keys.map((key) => object[key]);
},
reduceFlaggedOption({ value }) {
return value;
},
reduceOrUndefined(value) {
return value === undefined ? [false] : [true, value];
},
},
typeData,
value
);
}
function sizeInFields(typeData: Layout) {
let spec: FoldSpec<any, number> = {
map(type) {
return type.sizeInFields();
},
reduceArray(_, { inner, staticLength }): number {
let length = staticLength ?? NaN;
return length * layoutFold(spec, inner);
},
reduceObject(keys, object) {
return keys.map((key) => object[key]).reduce((x, y) => x + y);
},
reduceFlaggedOption({ isSome, value }) {
return isSome + value;
},
reduceOrUndefined(_) {
return 0;
},
};
return layoutFold<any, number>(spec, typeData);
}
function fromFields(typeData: Layout, fields: Field[], aux: any[]): any {
let { checkedTypeName } = typeData;
if (checkedTypeName) {
// there's a custom type!
return customTypes[checkedTypeName].fromFields(fields, aux);
}
if (typeData.type === 'array') {
let arrayTypeData = typeData as ArrayLayout<TypeMap>;
let size = sizeInFields(arrayTypeData.inner);
let length = aux.length;
let value = [];
for (let i = 0, offset = 0; i < length; i++, offset += size) {
value[i] = fromFields(
arrayTypeData.inner,
fields.slice(offset, offset + size),
aux[i]
);
}
return value;
}
if (typeData.type === 'option') {
let { optionType, inner } = typeData as OptionLayout<TypeMap>;
switch (optionType) {
case 'closedInterval':
case 'flaggedOption': {
let [first, ...rest] = fields;
let isSome = TypeMap.Bool.fromFields([first], []);
let value = fromFields(inner, rest, aux);
return { isSome, value };
}
case 'orUndefined': {
let [isDefined, value] = aux;
return isDefined ? fromFields(inner, fields, value) : undefined;
}
default:
throw Error('bug');
}
}
if (typeData.type === 'object') {
let { keys, entries } = typeData as ObjectLayout<TypeMap>;
let values: Record<string, any> = {};
let offset = 0;
for (let i = 0; i < keys.length; i++) {
let typeEntry = entries[keys[i]];
let size = sizeInFields(typeEntry);
values[keys[i]] = fromFields(
typeEntry,
fields.slice(offset, offset + size),
aux[i]
);
offset += size;
}
return values;
}
if (primitiveTypes.has(typeData.type as string)) {
return (PrimitiveMap as any)[typeData.type].fromFields(fields, aux);
}
return (TypeMap as any)[typeData.type].fromFields(fields, aux);
}
function emptyValue(typeData: Layout): any {
let { checkedTypeName } = typeData;
if (checkedTypeName) {
return emptyValueBase(typeData);
}
if (typeData.type === 'array') {
let arrayTypeData = typeData as ArrayLayout<TypeMap>;
let { inner, staticLength } = arrayTypeData;
if (staticLength == null) return [];
return Array(staticLength).fill(emptyValue(inner));
}
if (typeData.type === 'option') {
let optionTypeData = typeData as OptionLayout<TypeMap>;
switch (optionTypeData.optionType) {
case 'closedInterval':
case 'flaggedOption': {
let isSome = TypeMap.Bool.fromJSON(false);
let value = emptyValue(optionTypeData.inner);
if (optionTypeData.optionType === 'closedInterval') {
let innerInner = optionTypeData.inner.entries.lower;
let innerType =
TypeMap[innerInner.type as keyof TypeMap & keyof JsonMap];
value.lower = innerType.fromJSON(optionTypeData.rangeMin);
value.upper = innerType.fromJSON(optionTypeData.rangeMax);
}
return { isSome, value };
}
case 'orUndefined': {
return undefined;
}
default:
throw Error('bug');
}
}
if (typeData.type === 'object') {
let { keys, entries } = typeData as ObjectLayout<TypeMap>;
let values: Record<string, any> = {};
for (let i = 0; i < keys.length; i++) {
let typeEntry = entries[keys[i]];
values[keys[i]] = emptyValue(typeEntry);
}
return values;
}
return emptyValueBase(typeData);
}
function emptyValueBase(typeData: Layout) {
let { checkedTypeName } = typeData;
if (checkedTypeName) {
let checkedType = customTypes[checkedTypeName];
if (checkedType.emptyValue) return checkedType.emptyValue();
}
let typeName = typeData.type as keyof TypeMap & keyof JsonMap;
if (TypeMap[typeName]) {
let type = TypeMap[typeName];
if (type.emptyValue) return type.emptyValue();
}
let zero = Field.fromJSON('0');
let fields: Field[] = Array(sizeInFields(typeData)).fill(zero);
return fromFields(typeData, fields, toAuxiliary(typeData));
}
function check(typeData: Layout, value: any) {
return layoutFold<any, void>(
{
map(type, value) {
return type.check(value);
},
reduceArray() {},
reduceObject() {},
reduceFlaggedOption() {},
reduceOrUndefined() {},
},
typeData,
value
);
}
function toInput(typeData: Layout, value: any) {
return layoutFold<any, HashInput>(
{
map(type, value) {
return type.toInput(value);
},
reduceArray(array) {
let acc: HashInput = { fields: [], packed: [] };
for (let { fields, packed } of array) {
if (fields) acc.fields!.push(...fields);
if (packed) acc.packed!.push(...packed);
}
return acc;
},
reduceObject(keys, object) {
let acc: HashInput = { fields: [], packed: [] };
for (let key of keys) {
let { fields, packed } = object[key];
if (fields) acc.fields!.push(...fields);
if (packed) acc.packed!.push(...packed);
}
return acc;
},
reduceFlaggedOption({ isSome, value }) {
return {
fields: value.fields,
packed: isSome.packed!.concat(value.packed ?? []),
};
},
reduceOrUndefined(_) {
return {};
},
},
typeData,
value
);
}
type FoldSpec<T, R> = {
map: (type: GenericProvableExtended<any, any, Field>, value?: T) => R;
reduceArray: (array: R[], typeData: ArrayLayout<TypeMap>) => R;
reduceObject: (keys: string[], record: Record<string, R>) => R;
reduceFlaggedOption: (option: { isSome: R; value: R }) => R;
reduceOrUndefined: (value?: R) => R;
};
function layoutFold<T, R>(
spec: FoldSpec<T, R>,
typeData: Layout,
value?: T
): R {
let { checkedTypeName } = typeData;
if (checkedTypeName) {
// there's a custom type!
return spec.map(customTypes[checkedTypeName], value);
}
if (typeData.type === 'array') {
let arrayTypeData = typeData as ArrayLayout<TypeMap>;
let v: T[] | undefined[] | undefined = value as any;
if (arrayTypeData.staticLength != null && v === undefined) {
v = Array<undefined>(arrayTypeData.staticLength).fill(undefined);
}
let array = v?.map((x) => layoutFold(spec, arrayTypeData.inner, x)) ?? [];
return spec.reduceArray(array, arrayTypeData);
}
if (typeData.type === 'option') {
let { optionType, inner } = typeData as OptionLayout<TypeMap>;
switch (optionType) {
case 'closedInterval':
case 'flaggedOption':
let v: { isSome: T; value: T } | undefined = value as any;
return spec.reduceFlaggedOption({
isSome: spec.map(TypeMap.Bool, v?.isSome),
value: layoutFold(spec, inner, v?.value),
});
case 'orUndefined':
let mapped =
value === undefined ? undefined : layoutFold(spec, inner, value);
return spec.reduceOrUndefined(mapped);
default:
throw Error('bug');
}
}
if (typeData.type === 'object') {
let { keys, entries } = typeData as ObjectLayout<TypeMap>;
let v: Record<string, T> | undefined = value as any;
let object: Record<string, R> = {};
keys.forEach((key) => {
object[key] = layoutFold(spec, entries[key], v?.[key]);
});
return spec.reduceObject(keys, object);
}
if (primitiveTypes.has(typeData.type as string)) {
return spec.map((PrimitiveMap as any)[typeData.type], value);
}
return spec.map((TypeMap as any)[typeData.type], value);
}
// helper for pretty-printing / debugging
function toJSONEssential(typeData: Layout, value: any) {
return layoutFold<any, any>(
{
map(type, value) {
return type.toJSON(value);
},
reduceArray(array) {
if (array.length === 0 || array.every((x) => x === null)) return null;
return array;
},
reduceObject(_, object) {
for (let key in object) {
if (object[key] === null) {
delete object[key];
}
}
if (Object.keys(object).length === 0) return null;
return object;
},
reduceFlaggedOption({ isSome, value }) {
return isSome ? value : null;
},
reduceOrUndefined(value) {
return value ?? null;
},
},
typeData,
value
);
}
return { provableFromLayout, toJSONEssential };
}
// types
type WithChecked<TypeMap extends AnyTypeMap> = {
checkedType?: GenericLayout<TypeMap>;
checkedTypeName?: string;
};
type BaseLayout<TypeMap extends AnyTypeMap> = {
type: keyof TypeMap;
} & WithChecked<TypeMap>;
type RangeLayout<TypeMap extends AnyTypeMap, T = BaseLayout<TypeMap>> = {
type: 'object';
name: string;
keys: ['lower', 'upper'];
entries: { lower: T; upper: T };
} & WithChecked<TypeMap>;
type OptionLayout<TypeMap extends AnyTypeMap, T = BaseLayout<AnyTypeMap>> = {
type: 'option';
} & (
| {
optionType: 'closedInterval';
rangeMin: any;
rangeMax: any;
inner: RangeLayout<TypeMap, T>;
}
| {
optionType: 'flaggedOption';
inner: T;
}
| {
optionType: 'orUndefined';
inner: T;
}
) &
WithChecked<TypeMap>;
type ArrayLayout<TypeMap extends AnyTypeMap> = {
type: 'array';
inner: GenericLayout<TypeMap>;
staticLength: number | null;
} & WithChecked<TypeMap>;
type ObjectLayout<TypeMap extends AnyTypeMap> = {
type: 'object';
name: string;
keys: string[];
entries: Record<string, GenericLayout<TypeMap>>;
} & WithChecked<TypeMap>;
type GenericLayout<TypeMap extends AnyTypeMap> =
| OptionLayout<TypeMap>
| BaseLayout<TypeMap>
| ObjectLayout<TypeMap>
| ArrayLayout<TypeMap>;