Add deserialization support (jsonToXDR)
abuiles opened this issue · 1 comments
abuiles commented
Given the following definition:
const types = XDR.config((xdr) => {
xdr.typedef("Hash", xdr.opaque(2));
xdr.typedef('Int32', xdr.int());
xdr.struct("Price", [
["n", xdr.lookup("Int32")],
["d", xdr.lookup("Int32")],
]);
xdr.enum("MemoType", {
memoNone: 0,
memoText: 1,
memoId: 2,
memoHash: 3,
memoReturn: 4,
});
xdr.union("Memo", {
switchOn: xdr.lookup("MemoType"),
switchName: "type",
switches: [
["memoNone", xdr.void()],
["memoText", "text"],
["memoId", "id"]
],
arms: {
text: xdr.string(28),
id: xdr.lookup("Int32")
},
});
xdr.typedef('CounterInt', xdr.option(xdr.int()));
xdr.struct('Event', [
["attendees", xdr.int()],
["eventName", xdr.string(50)],
["secretSpeakers", xdr.array(xdr.lookup("Hash"), 2)],
["speakers", xdr.varArray(xdr.string())],
["price", xdr.lookup("Price")],
["memo", xdr.lookup("Memo")],
['meta', xdr.lookup('TransactionMeta')],
['counter', xdr.lookup("CounterInt")]
])
xdr.enum("TransactionMetaType", {
none: 0,
paid: 1
});
xdr.union("TransactionMeta", {
switchOn: xdr.lookup("TransactionMetaType"),
switches: [
["none", xdr.void()],
["paid", "price"]
],
arms: {
price: xdr.lookup("Price")
},
defaultArm: xdr.void()
});
})
You should be able to use the following JSON to create an Event struct:
{
"attendees": 5,
"eventName": "Lumenauts get together",
"secretSpeakers": [
"AAA=",
"AAE="
],
"speakers": [
"Jed",
"Tom",
"Zac"
],
"price": {
"n": 2,
"d": 1
},
"memo": {
"_type": "memoText",
"text": "foo"
},
"meta": {
"_type": "paid",
"price": {
"n": 2,
"d": 1
}
},
"counter": 2
}
The call to such function will look like jsonToXDR(types.Event, json) -- and the result would be the equivalent of doing:
let event = new types.Event({
attendees: 5,
eventName: "Lumenauts get together",
secretSpeakers: [Buffer.from([0, 0]), Buffer.from([0, 1])],
speakers: ['Jed', 'Tom', 'Zac'],
price: new types.Price({
n: 2,
d: 1
}),
memo: types.Memo.memoText("foo"),
meta: types.TransactionMeta.paid(new types.Price({
n: 2,
d: 1
})),
counter: 2
})