小明今天繼續完成的是用戶檢視買單交易帳簿的功能：

User 用戶功能

• 檢視買單交易帳簿

function getBuyOrderBook(string symbolName) view public returns (uint[], uint[]) {
    uint8 tokenNameIndex = getSymbolIndexOrThrow(symbolName);
    uint[] memory arrPricesBuy = new uint[](tokens[tokenNameIndex].amountBuyPrices);
    uint[] memory arrVolumesBuy = new uint[](tokens[tokenNameIndex].amountBuyPrices);

    uint whilePrice = tokens[tokenNameIndex].lowestBuyPrice;
    uint counter = 0;
    if (tokens[tokenNameIndex].curBuyPrice > 0) {
        while (whilePrice <= tokens[tokenNameIndex].curBuyPrice) {
            arrPricesBuy[counter] = whilePrice;
            uint volumeAtPrice = 0;
            uint offers_key = 0;

            offers_key = tokens[tokenNameIndex].buyBook[whilePrice].offers_key;
            while (offers_key <= tokens[tokenNameIndex].buyBook[whilePrice].offers_length) {
                volumeAtPrice += tokens[tokenNameIndex].buyBook[whilePrice].offers[offers_key].amount;
                offers_key++;
            }

            arrVolumesBuy[counter] = volumeAtPrice;

            if (whilePrice == tokens[tokenNameIndex].buyBook[whilePrice].higherPrice) {
                break;
            }
            else {
                whilePrice = tokens[tokenNameIndex].buyBook[whilePrice].higherPrice;
            }
            counter++;

        }
    }

    return (arrPricesBuy, arrVolumesBuy);

}

本文同時發佈於作者部落格：https://www.bdetw.com/blog

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