deth/dist/esm/vm/storage/CheckpointMap.js

Ethereum node focused on Developer Experience

export class CheckpointMap {
    constructor(state = {}) {
        this.state = state;
        this.checkpoints = [];
    }
    checkpoint() {
        this.checkpoints.push(this.state);
    }
    revert() {
        this.state = this.checkpoints.pop();
    }
    commit() {
        this.checkpoints.pop();
    }
    get(k) {
        return this.state[k];
    }
    set(k, v) {
        this.state = {
            ...this.state,
            [k]: v,
        };
    }
    copy() {
        return new CheckpointMap(this.state);
    }
}