nft智能合约的token_id控制并且生成

每个合约的token_id可以重复，但是在一个合约中token_id不能重复

表结构

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for fc_contract
-- ----------------------------
DROP TABLE IF EXISTS `fc_contract`;
CREATE TABLE `fc_contract`  (
  `id` bigint(0) NOT NULL AUTO_INCREMENT COMMENT '表id',
  `name` varchar(1024) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT 'nft name',
  `symbol` varchar(512) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT 'nft symbol',
  `address` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '合约地址',
  `type` int(0) NULL DEFAULT NULL COMMENT '类型 3:ERC721 2.ERC1155',
  `short_url` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '短地址',
  `version` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '合约版本',
  `cover` varchar(512) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '图标',
  `storage_id` bigint(0) NULL DEFAULT NULL COMMENT '图标保存Id',
  `owner` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '合约拥有者',
  `is_admin` tinyint(1) NULL DEFAULT 0 COMMENT '是否是官方合约',
  `verify` tinyint(1) NULL DEFAULT 0 COMMENT '是否已验证',
  `description` varchar(1000) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '合约描述',
  `last_token_id` bigint(0) NULL DEFAULT 0 COMMENT '上一次增发的tokenId',
  `banner_url` varchar(512) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT '' COMMENT '封面',
  `get_info_times` int(0) NULL DEFAULT 0 COMMENT '获取name和symbol次数',
  `is_royalties` tinyint(1) NULL DEFAULT NULL COMMENT '是否支持版权',
  `signer` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '签名人账号',
  `is_sync` tinyint(1) NULL DEFAULT 0 COMMENT '是否已经同步',
  `deleted` tinyint(1) NULL DEFAULT 0 COMMENT '逻辑删除',
  `create_time` bigint(0) NULL DEFAULT NULL COMMENT '创建时间',
  `update_time` bigint(0) NULL DEFAULT NULL COMMENT '更新时间',
  PRIMARY KEY (`id`) USING BTREE,
  INDEX `index2`(`address`) USING BTREE,
  INDEX `index3`(`symbol`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

SET FOREIGN_KEY_CHECKS = 1;

 

代码

@Transactional(rollbackFor = Exception.class)
    public List<BigInteger> getTokenId(String address,BigInteger count) {
        List<BigInteger> tokens=new ArrayList<>();
        String tokenId = this.contractExtMapper.getContractWithLock(address);
        BigInteger start=new BigInteger("0");
        if(null == tokenId) {
            tokenId = count+"";
            start=start.add(BigInteger.ZERO);
        } else {
            start=start.add(new BigInteger(tokenId));
            tokenId = new BigInteger(tokenId).add(count).toString();

        }
        BigInteger  end=start.add(count);
        for (BigInteger i=start;(i.compareTo(end)<=0);i=i.add(BigInteger.ONE)){
            if(i.compareTo(start)==0){
                continue;
            }
            tokens.add(i);
        }
        this.contractExtMapper.updateLastTokenId(tokenId, address);
        return tokens;
    }

 相关方法

@Select(value = "select last_token_id from fc_contract  where address = #{address} for update")
	String getContractWithLock(@Param("address") String address);


	@Update(value = "update fc_contract t set t.last_token_id = #{lastTokenId} where t.address = #{address}")
	Integer updateLastTokenId(@Param("lastTokenId") String lastTokenId, @Param("address") String address);