@zlattice/lattice-js/dist/esm/lattice/protobuf/serializer.js

Lattice blockchain TypeScript SDK with dual module support (CJS + ESM)

import * as protobuf from "protobufjs";
/**
 * Get the first(main) protobuf message type from a proto content string.
 * @param protoContent - The proto content string.
 * @returns The protobuf message type.
 */
async function getMessageProtoType(protoContent) {
    const parseResult = await protobuf.parse(protoContent);
    const root = parseResult.root;
    if (!root) {
        throw new Error("No root object found in the proto file");
    }
    if (!root.nested) {
        throw new Error("No nested objects found in the proto file");
    }
    const firstMessageName = Object.values(root.nested).find((nested) => nested instanceof protobuf.Type)?.name;
    if (!firstMessageName) {
        throw new Error("No message found in the proto file");
    }
    return parseResult.root.lookupType(firstMessageName);
}
/**
 * Serialize a message to a protobuf message.
 * @param messageTypeOrProtoContent - The protobuf message type or the proto content string.
 * @param json - The json string to serialize.
 * @returns The serialized message.
 */
async function serializeMessage(messageTypeOrProtoContent, json) {
    const messageType = typeof messageTypeOrProtoContent === "string"
        ? await getMessageProtoType(messageTypeOrProtoContent)
        : messageTypeOrProtoContent;
    const obj = JSON.parse(json);
    const message = messageType.fromObject(obj);
    return messageType.encode(message).finish();
}
/**
 * Deserialize a protobuf message to a json string.
 * @param messageTypeOrProtoContent - The protobuf message type or the proto content string.
 * @param data - The serialized message.
 * @returns The json string.
 */
async function deserializeMessage(messageTypeOrProtoContent, data) {
    const messageType = typeof messageTypeOrProtoContent === "string"
        ? await getMessageProtoType(messageTypeOrProtoContent)
        : messageTypeOrProtoContent;
    const message = messageType.decode(data);
    /**
      const obj = messageType.toObject(message, {
        longs: String,
        enums: String,
        bytes: String
      });
     */
    const obj = messageType.toObject(message, { defaults: false });
    return JSON.stringify(obj);
}
export { getMessageProtoType, serializeMessage, deserializeMessage };
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