第7課 技術(shù)小白如何在EOS上發(fā)行通證(TOKEN)？

1. 文章摘要

【本文目標】

在EOS私鏈環(huán)境發(fā)行TOKEN代幣，并進行轉(zhuǎn)賬交易。

【環(huán)境前置條件】

1）已搭建好EOS私鏈環(huán)境(可參考第4課 如何在UBUNTU虛擬機上編譯EOS完成環(huán)境搭建？)
2）會進行相關(guān)錢包賬號的操作( 參考第5課 EOS環(huán)境搭建入門（私鏈節(jié)點-錢包-密鑰-賬號）)
3） 本文操作時已存在以下資源信息
1] 錢包名稱 duncanwang，對應的解鎖密碼為"PW5JYSZRvSropLhguyxYY1zXgeQidSZnRKPKUXr2JUVTYay2zhuxT"
2] 系統(tǒng)私鑰/公鑰對已導入錢包:
EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV / 5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3

【技術(shù)收獲】

1） 創(chuàng)建自有代幣
2） 發(fā)行自有代幣
3） 代幣轉(zhuǎn)賬操作

2. 操作內(nèi)容

本文的操作內(nèi)容的流程圖如下所示：


2.1 創(chuàng)建賬戶

創(chuàng)建3個賬號，eosio.token賬號用于創(chuàng)建ColorBayToken代幣，wangdenghui賬號用于發(fā)行代幣，創(chuàng)建賬戶ouyanggege用于接收代幣。
創(chuàng)建eosio.token賬號

cleos create account eosio eosio.token EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV

輸出內(nèi)容：

duncanwang@duncanwang:~$ cleos wallet import 5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3 -n duncanwang
imported private key for: EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV
duncanwang@duncanwang:~$ cleos create account eosio eosio.token EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV
executed transaction: 5679e2ad487fe7956ab287beb1c8642635e493d54ef4e948be06e0c24af48520  200 bytes  1133 us
#         eosio <= eosio::newaccount            {"creator":"eosio","name":"eosio.token","owner":{"threshold":1,"keys":[{"key":"EOS6MRyAjQq8ud7hVNYcf...
warning: transaction executed locally, but may not be confirmed by the network yet

創(chuàng)建wangdenghui賬號

cleos create account eosio wangdenghui EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV

輸出內(nèi)容：

duncanwang@duncanwang:~/eos$ cleos create account eosio wangdenghui EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV
executed transaction: 09688423e0f287cd0ae829fc358b58ecd0ec7f6e7e403684969bcaa3c7227a91  200 bytes  320 us
#         eosio <= eosio::newaccount            {"creator":"eosio","name":"wangdenghui","owner":{"threshold":1,"keys":[{"key":"EOS6MRyAjQq8ud7hVNYcf...
warning: transaction executed locally, but may not be confirmed by the network yet

創(chuàng)建ouyanggege賬號

cleos create account eosio ouyanggege EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV

輸出內(nèi)容：

duncanwang@duncanwang:~/eos$ cleos create account eosio ouyanggege EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV EOS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV
executed transaction: 316a20b2c20669d853b116d6126b9f09fdece00a62c888acc2d4ab4c845d875b  200 bytes  738 us
#         eosio <= eosio::newaccount            {"creator":"eosio","name":"ouyanggege","owner":{"threshold":1,"keys":[{"key":"EOS6MRyAjQq8ud7hVNYcfn...
warning: transaction executed locally, but may not be confirmed by the network yet

2.2 部署代幣合約

cleos set contract eosio.token build/contracts/eosio.token -p eosio.token

參數(shù)說明：
-p,--permission TEXT 表示授權(quán)賬號，該合約授權(quán)給eosio.token賬號。
代幣合約eosio.token能讓許多不同的代幣同時在一個智能合約上發(fā)行，但是卻能被不同用戶管理。

duncanwang@duncanwang:~/eos$ cleos set contract eosio.token build/contracts/eosio.token -p eosio.token
Reading WAST/WASM from build/contracts/eosio.token/eosio.token.wasm...
Using already assembled WASM...
Publishing contract...
executed transaction: 74e746a1bcb58d69a47b8182a960f2657b56023ab30df959ff5e29405fec785b  8104 bytes  2088 us
#         eosio <= eosio::setcode               {"account":"eosio.token","vmtype":0,"vmversion":0,"code":"0061736d01000000017e1560037f7e7f0060057f7e...
#         eosio <= eosio::setabi                {"account":"eosio.token","abi":"0e656f73696f3a3a6162692f312e30010c6163636f756e745f6e616d65046e616d65...
warning: transaction executed locally, but may not be confirmed by the network yet

2.3 創(chuàng)建一個代幣

cleos push action eosio.token create '[ "eosio", "1000000000.0000 CBT", 0, 0, 0]' -p eosio.token

參數(shù)說明：
1） create 函數(shù)是用來新建一種代幣，并輸入代幣的各種屬性，同時 create 函數(shù)也是一個 action。action 是 eos 智能合約的接口函數(shù)，定義外界可以對智能合約做什么動作。
結(jié)合操作命令，說明各個參數(shù)的定義：
create( account_name issuer,/發(fā)行方賬號的名稱為"eosio"/
asset maximum_supply,/總供應量為10億和代幣名稱CBT （ColorBayToken的縮寫）/
uint8_t can_freeze,/資產(chǎn)是否可以凍結(jié)，0表示否/
uint8_t can_recall,/資產(chǎn)是否可以召回，0表示否/
uint8_t can_whitelist );/資產(chǎn)是否可以設(shè)置白名單，0表示無/
2）-p,--permission Type: Text - 授權(quán)給賬號eosio.token

duncanwang@duncanwang:~/eos$ cleos push action eosio.token create '[ "eosio", "1000000000.0000 CBT", 0, 0, 0]' -p eosio.token
executed transaction: 791687224acb86a715639af9b3b4660ac06ac07908c8746851382be661218739  120 bytes  4703 us
#   eosio.token <= eosio.token::create          {"issuer":"eosio","maximum_supply":"1000000000.0000 CBT"}
warning: transaction executed locally, but may not be confirmed by the network yet

2.4 發(fā)行代幣

cleos push action eosio.token issue '[ "wangdenghui", "10000.0000 CBT", "first ColorBayToken issue" ]' -p eosio

參數(shù)說明：
1） issue 函數(shù)是用來增發(fā)代幣，eosio.token 合約并不是新建了代幣就會得到代幣，新建的代幣只是存儲了資料，發(fā)幣者要想獲取代幣，需要調(diào)用 issue action 來獲得代幣。
void issue(
account_name to, /代幣的發(fā)行方為賬戶為wangdenghui,之前已經(jīng)創(chuàng)建/
asset quantity, /發(fā)行代幣的數(shù)量為10000個,代幣名稱為CBT/
string memo ); /表示備注說明，不能超過256個字節(jié)/

執(zhí)行輸入結(jié)果如下：

duncanwang@duncanwang:~/eos$ cleos push action eosio.token issue '[ "wangdenghui", "10000.0000 CBT", "first ColorBayToken issue" ]' -p eosio
executed transaction: 33b23322d6a413108350a21f23c77150d77de71a8aeeaefd5befd9e30ceec288  144 bytes  2602 us
#   eosio.token <= eosio.token::issue           {"to":"wangdenghui","quantity":"10000.0000 CBT","memo":"first ColorBayToken issue"}
#   eosio.token <= eosio.token::transfer        {"from":"eosio","to":"wangdenghui","quantity":"10000.0000 CBT","memo":"first ColorBayToken issue"}
#         eosio <= eosio.token::transfer        {"from":"eosio","to":"wangdenghui","quantity":"10000.0000 CBT","memo":"first ColorBayToken issue"}
#   wangdenghui <= eosio.token::transfer        {"from":"eosio","to":"wangdenghui","quantity":"10000.0000 CBT","memo":"first ColorBayToken issue"}
warning: transaction executed locally, but may not be confirmed by the network yet

2.5 代幣轉(zhuǎn)賬

輝哥賬號轉(zhuǎn)賬給歐陽哥哥合計8000個彩貝幣，用于支付午餐費用。

cleos push action eosio.token transfer '[ "wangdenghui", "ouyanggege", "8000.0000 CBT", "pay for lunch!" ]' -p wangdenghui

轉(zhuǎn)賬成功輸出結(jié)果：

duncanwang@duncanwang:~/eos$ cleos push action eosio.token transfer '[ "wangdenghui", "ouyanggege", "8000.0000 CBT", "pay for lunch!" ]' -p wangdenghui
executed transaction: 42c0f99566561977424df6417581114c3d9865c5194256f6b7a1311abf97802a  144 bytes  2011 us
#   eosio.token <= eosio.token::transfer        {"from":"wangdenghui","to":"ouyanggege","quantity":"8000.0000 CBT","memo":"pay for lunch!"}
#   wangdenghui <= eosio.token::transfer        {"from":"wangdenghui","to":"ouyanggege","quantity":"8000.0000 CBT","memo":"pay for lunch!"}
#    ouyanggege <= eosio.token::transfer        {"from":"wangdenghui","to":"ouyanggege","quantity":"8000.0000 CBT","memo":"pay for lunch!"}
warning: transaction executed locally, but may not be confirmed by the network yet

2.6 查詢余額

查詢輝哥和歐陽哥哥的賬號，核實金額是否已到賬。

cleos get currency balance eosio.token wangdenghui
cleos get currency balance eosio.token ouyanggege

正確輸出結(jié)果：

duncanwang@duncanwang:~/eos$ cleos get currency balance eosio.token wangdenghui
2000.0000 CBT
duncanwang@duncanwang:~/eos$ cleos get currency balance eosio.token ouyanggege
8000.0000 CBT

2.7 閱讀eosio.token智能合約代碼

EOS 官方提供了一個代幣（資產(chǎn)）智能合約 Demo —— eosio.token，這個示例合約給出了 EOS 官方智能合約開發(fā)的標準結(jié)構(gòu)和開發(fā)方法，并且真正的 EOS 代幣也會借鑒這個示例合約的邏輯，是 EOS 智能合約入門的經(jīng)典案例。
默認情況下，該智能合約存在路徑：~/eos/contracts/eosio.token
文件解釋如下：
eosio.token.hpp - 頭文件，定義類和函數(shù)
eosio.token.cpp - 實現(xiàn)
eosio.token.abi - Application Binary Interface，是一個接口文件，描述了智能合約與上層應用之間的數(shù)據(jù)交換格式
CMakeLists.txt - 編譯文件

3. 參考

1） 在EOSIO上發(fā)行代幣
2） Introduction to the EOSIO Token Contract
3）【許曉笛】EOS智能合約案例解析(1)

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