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I'm Lucio进入区块链的大门 — — 取消钱包授权（第五讲）
前面我们有讲到不同钱包的使用方法，和如何访问Dapp。对于经常访问Dapp和使用DeFi应用的人们来说，若想在DeFi协议上使用代币，‘’代币授权‘’是经常性的步骤。什么是代币授权？以太坊链、EVM链（BSC/HECO/OKExChain/Polygon等）和波场链上的Dapp大都涉及到合约操作，授权即表示允许该合约地址提取用户的代币。Dapp需要访问代币才能需要对其操作。比如你想在uniswap卖掉WBTC，则需要‘’Approve‘’ Uniswap的智能合约访问你钱包内WBTC的权限，然后才能通过第二笔交易把WBTC转换成其他代币。在钱包上面，你可以看到该授权。为了提升用户体验，减少授权次数，Dapp会要求无限授权，即该智能合约有权对钱包内的某个币种有不限量的转移权限。对于靠谱的知名平台，如uniswap等，不会恶意操作转移用户的钱包资产。如果该Dapp一开始就是恶意的，则该钱包对于已经授权该平台的所有币种都有极大的安全隐患。即便是成熟的项目，也有可能存在漏洞而被攻击者利用。所以一旦用户给Dapp授权，钱包的该代币就会陷入风险。 虽然硬件钱包可以保护私钥，并且没有人能绕过硬...
I'm Lucio进入区块链的大门 — — 网页插件钱包（第三讲）
我们前面讲到了加密货币钱包的概览，上一讲是关于imtoken钱包的使用。本讲的主要内容是Metamask。metamask 有两个版本，一个是在谷歌浏览器chrome的以太坊钱包插件，也是最常用的，另一个是手机的app。这里主要讲最常用的chrome浏览器插件版。 1. 下载谷歌浏览器：https://www.google.com/chrome/ 记住一定要在官网下载，或者在有保障的平台下载，不要下载未知源头下载的谷歌浏览器。 2. 下载metamask的chrome浏览器插件 metamask的官方网站为https://metamask.io/ 点击下载，然后选择Chrome， Install metamask for chrome 这个时候就会跳转到chrome商店然后添加插件到chrome浏览器就可以了。 安装完成后，浏览器的插件栏会出现metamask小狐狸图标，安装完成可以开始使用。 3. 开始使用生成钱包根据引导一步一步走，点击”开始使用”2. 导入或者创建 根据你的钱包习惯，喜欢用自己老的钱包去作为metamask钱包的话，可以直接用助记词导入钱包，在metamas...
I'm Lucio进入区块链的大门 — — 硬件钱包的使用（第四讲）
我们前面讲到了加密货币钱包的概览，imtoken和metamask的使用。本讲的主要内容是硬件钱包 — ledger nano X的使用。 为什么选择Ledger？ Ledger是法国的硬件钱包品牌，是目前销量最大的硬件钱包。产品经过了市场和安全机构的验证，使用方便。Ledger目前有三款产品，是ledger nano S，Ledger nano S plus 和 ledger nano X。Ledger nano S 只能连接电脑端并且最多安装3个币种的app。Ledger nano X 可以连接电脑端，并且可以通过蓝牙连接手机端。存储空间大，可以同时安装几十个app。因为Ledger nano X可以连接手机，适合对于操作频繁的用户购买。Ledger nano S plus则是 Ledger nano S的升级款，也可以同时安装几十个app，但是无法通过蓝牙与手机连接。在这里我推荐用户购买ledger nano S plus 或者ledger nano X，用户可以按需购买。为了保证安全，这里硬件设备只推荐从官网购买，因为无法判定其他经销商的真伪。避免因为买到假的硬件钱包或者...
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I'm Lucio进入区块链的大门 — — 取消钱包授权（第五讲）
前面我们有讲到不同钱包的使用方法，和如何访问Dapp。对于经常访问Dapp和使用DeFi应用的人们来说，若想在DeFi协议上使用代币，‘’代币授权‘’是经常性的步骤。什么是代币授权？以太坊链、EVM链（BSC/HECO/OKExChain/Polygon等）和波场链上的Dapp大都涉及到合约操作，授权即表示允许该合约地址提取用户的代币。Dapp需要访问代币才能需要对其操作。比如你想在uniswap卖掉WBTC，则需要‘’Approve‘’ Uniswap的智能合约访问你钱包内WBTC的权限，然后才能通过第二笔交易把WBTC转换成其他代币。在钱包上面，你可以看到该授权。为了提升用户体验，减少授权次数，Dapp会要求无限授权，即该智能合约有权对钱包内的某个币种有不限量的转移权限。对于靠谱的知名平台，如uniswap等，不会恶意操作转移用户的钱包资产。如果该Dapp一开始就是恶意的，则该钱包对于已经授权该平台的所有币种都有极大的安全隐患。即便是成熟的项目，也有可能存在漏洞而被攻击者利用。所以一旦用户给Dapp授权，钱包的该代币就会陷入风险。 虽然硬件钱包可以保护私钥，并且没有人能绕过硬...
I'm Lucio进入区块链的大门 — — 网页插件钱包（第三讲）
我们前面讲到了加密货币钱包的概览，上一讲是关于imtoken钱包的使用。本讲的主要内容是Metamask。metamask 有两个版本，一个是在谷歌浏览器chrome的以太坊钱包插件，也是最常用的，另一个是手机的app。这里主要讲最常用的chrome浏览器插件版。 1. 下载谷歌浏览器：https://www.google.com/chrome/ 记住一定要在官网下载，或者在有保障的平台下载，不要下载未知源头下载的谷歌浏览器。 2. 下载metamask的chrome浏览器插件 metamask的官方网站为https://metamask.io/ 点击下载，然后选择Chrome， Install metamask for chrome 这个时候就会跳转到chrome商店然后添加插件到chrome浏览器就可以了。 安装完成后，浏览器的插件栏会出现metamask小狐狸图标，安装完成可以开始使用。 3. 开始使用生成钱包根据引导一步一步走，点击”开始使用”2. 导入或者创建 根据你的钱包习惯，喜欢用自己老的钱包去作为metamask钱包的话，可以直接用助记词导入钱包，在metamas...
I'm Lucio进入区块链的大门 — — 硬件钱包的使用（第四讲）
我们前面讲到了加密货币钱包的概览，imtoken和metamask的使用。本讲的主要内容是硬件钱包 — ledger nano X的使用。 为什么选择Ledger？ Ledger是法国的硬件钱包品牌，是目前销量最大的硬件钱包。产品经过了市场和安全机构的验证，使用方便。Ledger目前有三款产品，是ledger nano S，Ledger nano S plus 和 ledger nano X。Ledger nano S 只能连接电脑端并且最多安装3个币种的app。Ledger nano X 可以连接电脑端，并且可以通过蓝牙连接手机端。存储空间大，可以同时安装几十个app。因为Ledger nano X可以连接手机，适合对于操作频繁的用户购买。Ledger nano S plus则是 Ledger nano S的升级款，也可以同时安装几十个app，但是无法通过蓝牙与手机连接。在这里我推荐用户购买ledger nano S plus 或者ledger nano X，用户可以按需购买。为了保证安全，这里硬件设备只推荐从官网购买，因为无法判定其他经销商的真伪。避免因为买到假的硬件钱包或者...
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Take imtoken as an example to explain the usage of mobile software wallet
1. Download the Imtoken
imtoken official website: https://token.im
iPhone can click on the iPhone version on the official website to jump and then download.
Android users need to go to the official website to download and install.
Remember to go to the official website. Recently, fake mobile phone software wallets are too much. If you download the wrong app, it will lead to the loss of assets!
2. Create a wallet
In this step, I recommend users turn on airplane mode on the phone and turn off Bluetooth. If possible, it is recommended to restore the phone and erase all data to ensure that the mnemonic or key is safe.
Open imtoken, if you want to import the wallet to restore the old wallet, select the recovery identity.
Here we mainly talk about how to create a wallet.
1) Click Create Identity
2) Enter the ID, password, and password hint
3) Select the crypto to be created
Here ETH BTC and ATOM are created by default, and other cryptos such as TRX and LTC can be created by choice.
4) Backup mnemonic phrase
The mnemonic phrase of imtoken consists of 12 words. I recommend users record with pen and paper for the first time. Later, you can save the paper in an absolutely safe place, or transfer it to an encrypted USB disk to protect the hardware. Note that the phrases must not be recorded in any apps, and must not be copied or screenshot. Many apps will read the data of the pasteboard and album, and these operations will directly lead to the leakage of mnemonic phrases.
5) Confirm the mnemonic phrase
In order to ensure that the mnemonic is recorded correctly, the system will ask you to confirm the mnemonic again, so as to avoid the loss of the key due to recording errors.
6) Finish
Here you can reconnect to the network and start using imtoken.
Follow-up functions take eth as an example.
3. Transfer function
4. Add assets
Click the plus sign to add tokens. In imtoken, new coins are often transferred to the account and can be monitored, and you are prompted to add assets.
If the asset you want to add is not on the list, you need to copy the asset's contract address to add it. To know the contract address to be added, you can search on etherscan.
etherscan address: https://etherscan.io
5. Switch network
In this interface, you can choose to switch between different networks and switch according to your needs.
6. Using Dapps
Enter the address of the Dapp in the address bar, and then link the wallet to use the Dapp. But before linking the wallet or sign, you must ensure the security of the Dapp to avoid linking to dangerous Dapps, resulting in asset loss. Take uniswap as an example here. uniswap: https://app.uniswap.org/#/swap?chain=mainnet
7. Private key export
If we want to record the private key, taking ETH as an example, we can click the three dots in the upper right corner, and then click the advanced mode to export the private key. After entering the password and reading the prompt, you can see the export private key interface. I recommend users disconnect from the Internet and turn off Bluetooth, turn on the airplane mode, and then record the private key with a pen and check it multiple times, and then take good care of the private key.
The above is the usage tutorial of imtoken, you can explore it by yourself, and find more functions.
Written by: Lucio Lyu
Twitter: @imLucio_eth
Take imtoken as an example to explain the usage of mobile software wallet
1. Download the Imtoken
imtoken official website: https://token.im
iPhone can click on the iPhone version on the official website to jump and then download.
Android users need to go to the official website to download and install.
Remember to go to the official website. Recently, fake mobile phone software wallets are too much. If you download the wrong app, it will lead to the loss of assets!
2. Create a wallet
In this step, I recommend users turn on airplane mode on the phone and turn off Bluetooth. If possible, it is recommended to restore the phone and erase all data to ensure that the mnemonic or key is safe.
Open imtoken, if you want to import the wallet to restore the old wallet, select the recovery identity.
Here we mainly talk about how to create a wallet.
1) Click Create Identity
2) Enter the ID, password, and password hint
3) Select the crypto to be created
Here ETH BTC and ATOM are created by default, and other cryptos such as TRX and LTC can be created by choice.
4) Backup mnemonic phrase
The mnemonic phrase of imtoken consists of 12 words. I recommend users record with pen and paper for the first time. Later, you can save the paper in an absolutely safe place, or transfer it to an encrypted USB disk to protect the hardware. Note that the phrases must not be recorded in any apps, and must not be copied or screenshot. Many apps will read the data of the pasteboard and album, and these operations will directly lead to the leakage of mnemonic phrases.
5) Confirm the mnemonic phrase
In order to ensure that the mnemonic is recorded correctly, the system will ask you to confirm the mnemonic again, so as to avoid the loss of the key due to recording errors.
6) Finish
Here you can reconnect to the network and start using imtoken.
Follow-up functions take eth as an example.
3. Transfer function
4. Add assets
Click the plus sign to add tokens. In imtoken, new coins are often transferred to the account and can be monitored, and you are prompted to add assets.
If the asset you want to add is not on the list, you need to copy the asset's contract address to add it. To know the contract address to be added, you can search on etherscan.
etherscan address: https://etherscan.io
5. Switch network
In this interface, you can choose to switch between different networks and switch according to your needs.
6. Using Dapps
Enter the address of the Dapp in the address bar, and then link the wallet to use the Dapp. But before linking the wallet or sign, you must ensure the security of the Dapp to avoid linking to dangerous Dapps, resulting in asset loss. Take uniswap as an example here. uniswap: https://app.uniswap.org/#/swap?chain=mainnet
7. Private key export
If we want to record the private key, taking ETH as an example, we can click the three dots in the upper right corner, and then click the advanced mode to export the private key. After entering the password and reading the prompt, you can see the export private key interface. I recommend users disconnect from the Internet and turn off Bluetooth, turn on the airplane mode, and then record the private key with a pen and check it multiple times, and then take good care of the private key.
The above is the usage tutorial of imtoken, you can explore it by yourself, and find more functions.
Written by: Lucio Lyu
Twitter: @imLucio_eth
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