Module sui::accumulator_settlement

• Constants
• Function settlement_prologue
• Function settle_u128

use std::ascii;
use std::bcs;
use std::option;
use std::string;
use std::vector;
use sui::accumulator;
use sui::accumulator_metadata;
use sui::address;
use sui::bag;
use sui::dynamic_field;
use sui::hex;
use sui::object;
use sui::party;
use sui::transfer;
use sui::tx_context;
use sui::vec_map;

Constants

const ENotSystemAddress: u64 = 0;

const EInvalidSplitAmount: u64 = 1;

Function settlement_prologue

Called by settlement transactions to ensure that the settlement transaction has a unique digest.

fun settlement_prologue(_epoch: u64, _checkpoint_height: u64, _idx: u64, ctx: &sui::tx_context::TxContext)

Click to open

Implementation

fun settlement_prologue(_epoch: u64, _checkpoint_height: u64, _idx: u64, ctx: &TxContext) {
    assert!(ctx.sender() == @0x0, ENotSystemAddress);
}

Function settle_u128

fun settle_u128<T>(accumulator_root: &mut sui::accumulator::AccumulatorRoot, owner: address, merge: u128, split: u128, ctx: &mut sui::tx_context::TxContext)

Click to open

Implementation

fun settle_u128<T>(
    accumulator_root: &mut AccumulatorRoot,
    owner: address,
    merge: u128,
    split: u128,
    ctx: &mut TxContext,
) {
    assert!(ctx.sender() == @0x0, ENotSystemAddress);
    // Merge and split should be netted out prior to calling this function.
    assert!((merge == 0 ) != (split == 0), EInvalidSplitAmount);
    let name = accumulator_key<T>(owner);
    if (accumulator_root.has_accumulator<T, U128>(name)) {
        let is_zero = {
            let value: &mut U128 = accumulator_root.borrow_accumulator_mut(name);
            value.update(merge, split);
            value.is_zero()
        };
        if (is_zero) {
            let value = accumulator_root.remove_accumulator<T, U128>(name);
            destroy_u128(value);
            accumulator_root.remove_metadata<T>(owner);
        }
    } else {
        // cannot split if the field does not yet exist
        assert!(split == 0, EInvalidSplitAmount);
        let value = create_u128(merge);
        accumulator_root.add_accumulator(name, value);
        accumulator_root.create_metadata<T>(owner, ctx);
    };
}