Deploy, Issue and Transfer Tokens

【Deploy, Issue and Transfer Tokens】

　　本例使用 eosio.token 合約來嘗試發行Token.

一、簽出 eosio.contracts。

git clone https://github.com/EOSIO/eosio.contracts --branch v1.4.0 --single-branch

　　這裏頭有不少eosio寫的標準合約。

　　

　　咱們將使用上圖中的 eosio.token 合約來練習發佈 token。

二、eosio.token很是的簡單，僅包含 eosio.token.hpp、eosio.token.cpp兩件文件。其中提供了6個action：

　　

三、創建一個 eosio.token account，此帳戶用於發佈eosio.token合約。

cleos create account eosio eosio.token xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

四、在 eosio.token 目錄下編譯合約 

eosio-cpp -I include -o eosio.token.wasm src/eosio.token.cpp --abigen

五、用 eosio.token 帳號發佈合約 

cleos set contract eosio.token /home/ubuntu/contracts/eosio.contracts/eosio.token --abi eosio.token.abi -p eosio.token@active

六、一個合約能夠建立多個token。使用 create 方法建立一種token。

cleos push action eosio.token create '[ "eosio", "1000000000.0000 SYS"]' -p eosio.token@active

　　由於此處是建立token，因此須要 eosio.token 帳戶的權限。

　　it's a symbol_name type composed of two pieces of data, a maximum supply float and a symbol_name in capitalized alpha characters only, for example "1.0000 SYM".

　　The issuer will be the one with authority to call issue and or perform other actions such as freezing, recalling, and whitelisting of owners.

 

　　This command created a new token SYS with a precision of 4 decimals and a maximum supply of 1000000000.0000 SYS. To create this token requires the permission of the eosio.token contract. For this reason, -p eosio.token@active was passed to authorize the request.

七、發行token。

　　The issuer can issue new tokens to the "alice" account created earlier.

　　發行者（issuer）能夠給其它用戶發行token。

cleos push action eosio.token issue '[ "alice", "100.0000 SYS", "memo" ]' -p eosio@active

　　注意，由於此處是發行token，因此須要發行者（issuer）的權限。

　　

　　To inspect the transaction, try using the -d -j options, they indicate "don't broadcast" and "return transaction as json," which you may find useful during development.

cleos push action eosio.token issue '["alice", "100.0000 SYS", "memo"]' -p eosio@active -d -j

八、轉移 token。

cleos push action eosio.token transfer '[ "alice", "bob", "25.0000 SYS", "m" ]' -p alice@active

　　Now check if "bob" got the tokens using cleos get currency balance

cleos get currency balance eosio.token bob SYS
25.00 SYS

　　Check "alice's" balance, notice that tokens were deducted from the account

cleos get currency balance eosio.token alice SYS
75.00 SYS

 

參考：

一、https://developers.eos.io/eosio-home/docs/token-contract#section-step-3-compile-the-contract