@chainsafe/ssz/lib/type/listUintNum64.js

Simple Serialize

import { packedUintNum64sToLeafNodes, subtreeFillToContents } from "@chainsafe/persistent-merkle-tree";
import { addLengthNode } from "./arrayBasic.js";
import { ListBasicType } from "./listBasic.js";
import { UintNumberType } from "./uint.js";
/**
 * Specific implementation of ListBasicType for UintNumberType with some optimizations.
 */
export class ListUintNum64Type extends ListBasicType {
    constructor(limit, opts) {
        super(new UintNumberType(8), limit, opts);
    }
    /**
     * Return a ListBasicTreeViewDU with nodes populated
     */
    toViewDU(value) {
        // no need to serialize and deserialize like in the abstract class
        const { treeNode, leafNodes } = this.packedUintNum64sToNode(value);
        // cache leaf nodes in the ViewDU
        return this.getViewDU(treeNode, {
            nodes: leafNodes,
            length: value.length,
            nodesPopulated: true,
        });
    }
    /**
     * No need to serialize and deserialize like in the abstract class
     */
    value_toTree(value) {
        const { treeNode } = this.packedUintNum64sToNode(value);
        return treeNode;
    }
    packedUintNum64sToNode(value) {
        if (value.length > this.limit) {
            throw new Error(`Exceeds limit: ${value.length} > ${this.limit}`);
        }
        const leafNodes = packedUintNum64sToLeafNodes(value);
        // subtreeFillToContents mutates the leafNodes array
        const rootNode = subtreeFillToContents([...leafNodes], this.chunkDepth);
        const treeNode = addLengthNode(rootNode, value.length);
        return { treeNode, leafNodes };
    }
}
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