目前想存下相对于当前时间100年以后的时间，当输入的时间超过2106年后，就重新从1970来开始累加
合约中常用的时间类型为
time_point
time_point_sec由于两个都是uint32_t（unsigned int）类型保存秒数，最大值是4294967295，
EOSIO时间戳使用的仍然是Unix时间戳，即从1970/1/1 0:0:0开始计算，所以可以表示到最大的时间为2106年
无法满足需求
存储当前更新时间与结束时间的差值秒数作为存储数据
计算每块供应率
(github)
/**
* @notice Returns the current per-block supply interest rate for this cToken
* @return The supply interest rate per block, scaled by 1e18
*/
function supplyRatePerBlock() external view returns (uint) {
return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa);
}返回-每块的供应利率，按1e18缩放
跟一下关键参数
（github）
/**
* @notice Gets balance of this contract in terms of the underlying
* @dev This excludes the value of the current message, if any
* @return The quantity of underlying tokens owned by this contract
*/
function getCashPrior() internal view returns (uint) {
EIP20Interface token = EIP20Interface(underlying);
return token.balanceOf(address(this));
}代码逻辑为，获取当前合约地址拥有的基础代币余额数量
借出的代币总数
存入的代币总数（储备金）
市场的当前储备系数
(github)
/**
* @notice Calculates the current supply rate per block
* @param cash The amount of cash in the market
* @param borrows The amount of borrows in the market
* @param reserves The amount of reserves in the market
* @param reserveFactorMantissa The current reserve factor for the market
* @return The supply rate percentage per block as a mantissa (scaled by 1e18)
*/
function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) public view returns (uint) {
uint oneMinusReserveFactor = uint(1e18).sub(reserveFactorMantissa); // 单量减去储备的系数
uint borrowRate = getBorrowRate(cash, borrows, reserves); // 获取借出的利率
uint rateToPool = borrowRate.mul(oneMinusReserveFactor).div(1e18); // 将借出的利率缩小储备系数倍数
return utilizationRate(cash, borrows, reserves).mul(rateToPool).div(1e18); // 市场利用率/缩小储备系数后的借出利率
}add sub mul div 来自SafeMath库，对等是加减乘除
（github）
/**
* @notice Calculates the utilization rate of the market: `borrows / (cash + borrows - reserves)`
* @param cash The amount of cash in the market
* @param borrows The amount of borrows in the market
* @param reserves The amount of reserves in the market (currently unused)
* @return The utilization rate as a mantissa between [0, 1e18]
*/
function utilizationRate(uint cash, uint borrows, uint reserves) public pure returns (uint) {
// Utilization rate is 0 when there are no borrows
if (borrows == 0) {
return 0;
}
return borrows.mul(1e18).div(cash.add(borrows).sub(reserves)); // 借出/（账户剩余+借出-存入）
// 借出，就是发币合约把代币转给其他的账户，当其他账户存币时，再转回发币合约账户
} /**
* @notice Calculates the current borrow rate per block, with the error code expected by the market
* @param cash The amount of cash in the market
* @param borrows The amount of borrows in the market
* @param reserves The amount of reserves in the market
* @return The borrow rate percentage per block as a mantissa (scaled by 1e18)
*/
function getBorrowRate(uint cash, uint borrows, uint reserves) public view returns (uint) {
uint util = utilizationRate(cash, borrows, reserves); //计算市场利用率
if (util <= kink) {
return util.mul(multiplierPerBlock).div(1e18).add(baseRatePerBlock);
} else {
uint normalRate = kink.mul(multiplierPerBlock).div(1e18).add(baseRatePerBlock);
uint excessUtil = util.sub(kink);
return excessUtil.mul(jumpMultiplierPerBlock).div(1e18).add(normalRate);
}
}应用跳转乘数的利用率点，当利用率小于这个配置值时，走相应逻辑
利用率乘数，得出利率的斜率
利用率的利率增长率（按1e18缩放
multiplierPerBlock = multiplierPerYear.div(blocksPerYear);
jumpMultiplierPerBlock = jumpMultiplierPerYear.div(blocksPerYear);
初始值，每年的基础利率
利率模型假设的每年大约的块数
基本利率是利用率为0时的y截距，
baseRatePerBlock = baseRatePerYear.div(blocksPerYear);
达到指定的利用率点后的multiplierPerBlock
稍后补充
Ctrl+Shift+Del 清除Google浏览器缓存的快捷键
Ctrl+Shift+R 重新加载当前网页而不使用缓存内容
Ctrl + F5 去除缓存+刷新快捷键
github: https://github.com/hukkinj1/cosmospy
Version 5.0.1
Tools for Cosmos wallet management and offline transaction signing
Installing from PyPI repository (https://pypi.org/project/cosmospy):
pip install cosmospyfrom cosmospy import generate_wallet
wallet = generate_wallet()The value assigned to wallet will be a dictionary just like:
{
"seed": "arch skill acquire abuse frown reject front second album pizza hill slogan guess random wonder benefit industry custom green ill moral daring glow elevator",
"derivation_path": "m/44'/118'/0'/0/0",
"private_key": b"\xbb\xec^\xf6\xdcg\xe6\xb5\x89\xed\x8cG\x05\x03\xdf0:\xc9\x8b \x85\x8a\x14\x12\xd7\xa6a\x01\xcd\xf8\x88\x93",
"public_key": b"\x03h\x1d\xae\xa7\x9eO\x8e\xc5\xff\xa3sAw\xe6\xdd\xc9\xb8b\x06\x0eo\xc5a%z\xe3\xff\x1e\xd2\x8e5\xe7",
"address": "cosmos1uuhna3psjqfxnw4msrfzsr0g08yuyfxeht0qfh",
}from cosmospy import seed_to_privkey
seed = "teach there dream chase fatigue abandon lava super senior artefact close upgrade"
privkey = seed_to_privkey(seed, path="m/44'/118'/0'/0/0")from cosmospy import privkey_to_pubkey
privkey = bytes.fromhex("6dcd05d7ac71e09d3cf7da666709ebd59362486ff9e99db0e8bc663570515afa")
pubkey = privkey_to_pubkey(privkey)from cosmospy import pubkey_to_address
pubkey = bytes.fromhex("03e8005aad74da5a053602f86e3151d4f3214937863a11299c960c28d3609c4775")
addr = pubkey_to_address(pubkey)from cosmospy import privkey_to_address
privkey = bytes.fromhex("6dcd05d7ac71e09d3cf7da666709ebd59362486ff9e99db0e8bc663570515afa")
addr = privkey_to_address(privkey)from cosmospy import Transaction
tx = Transaction(
privkey=bytes.fromhex("26d167d549a4b2b66f766b0d3f2bdbe1cd92708818c338ff453abde316a2bd59"),
account_num=11335,
sequence=0,
fee=1000,
gas=70000,
memo="",
chain_id="cosmoshub-3",
sync_mode="sync",
)
tx.add_transfer(recipient="cosmos103l758ps7403sd9c0y8j6hrfw4xyl70j4mmwkf", amount=387000)
tx.add_transfer(recipient="cosmos1lzumfk6xvwf9k9rk72mqtztv867xyem393um48", amount=123)
pushable_tx = tx.get_pushable()One or more token transfers can be added to a transaction by calling the add_transfer method.
When the transaction is fully prepared, calling get_pushable will return a signed transaction in the form of a JSON string. This can be used as request body when calling the POST /txs endpoint of the Cosmos REST API.
如果想让其他浏览器显示新发的代币，需要主动提交代币信息，对方审核通过后，即可显示。
打开网址https://etherscan.io，在此处输入 token 的智能合约地址，如下图：
搜索后，如下图：
按下图指示，点击“verify and publish”来发布代码，
由于读者已经发布了代码，这里就找了几张图贴出来，以供参考。
步骤一：
步骤二：
步骤三：
若出现如下图，即表示收录成功。
