3 Creating Tokens
In CyberWay everybody can create his/her own type of tokens (In EOS this right applies to validators only). The tokens of the application should be deployed on a separate account from
cyber.token. When creating tokens a developer can use a reference implementation of the cyber.token contract as a base by loading its contents into developer’s workspace.Enter the directory created for the contracts and load a copy of the remote repository with the contract source files into it.
cd CONTRACTS_DIR
git clone https://github.com/cyberway/cyberway.contracts --branch <branch name> --single-branch
The cyberway.contracts repository contains several contracts, but the
cyber.token contract is required to create tokens.cd cyberway.contracts/cyber.token
Before you deploy a token-contract, you need to create an account of this contract by executing the following command line:
cleos create account olga olga.token <public key>
Command line parameters:
olga — an account name for the contract being created;
olga.token — a name of the token contract downloaded from the
cyberway.contracts repository with the source files.As an example a contract account has been created with the
olga.token name.eosio-cpp -I include -o olga.token.wasm src/olga.token.cpp --abigen
The contract is compiled into a web assembler file wasm format. The presence of the
--abigen option indicates that the abi/olga.token.abi file will also be generated.cleos set contract olga.token CONTRACTS_DIR/cyberway.contracts/olga.token --abi abi/olga.token.abi -p [email protected]
Parameter:
[email protected] — a name that will be used to authorize the request.The token contract will be considered successfully installed if the resulting output of the command being executed contains information of the form:
executed transaction: ...
# eosio <= eosio::setcode {"account":"olga.token","vmtype":0,"vmversion":0,"code":"<code>
# eosio <= eosio::setabi {"account":"olga.token","abi":"<code>
warning: transaction executed locally, but may not be confirmed by the network yet ]
To create a new token use the action
create. The argument is the type of the token symbol_name, which contains two values — the maximum value of the sentence and the symbol of the token. The call to this action has the form:cleos push action olga.token create '{"issuer":"olga", "maximum_supply":"1000000000.0000 SYS"}' -p [email protected]
The
-p [email protected] option authorizes the olga.token contract to perform this action.Creating a token is considered successful if the following information appears on the monitor:
executed transaction: <info>
# olga.token <= olga.token::create {"issuer":"olga","maximum_supply":"1000000000.0000 SYS"}
As a result, a new token SYS will be created, which has an accuracy of four decimal digits. The maximum allowable number of tokens in circulation should be limited to the value of 1,000,000,000. To create this token, a permission of the contract
olga.token is required. The name [email protected] will be used when authorizing the request.The author of a token can issue tokens to an already existing account, for example, to an account with the name «alice» by executing:
cleos push action olga.token issue '[ "alice", "100.0000 SYS", "memo" ]' -p [email protected]
The following information should appear as a result of the command execution:
executed transaction: ...
# olga.token <= olga.token::issue {"to":"user","quantity":"100.0000 SYS","memo":"memo"}
>> issue
# olga.token <= olga.token::transfer {"from":"olga","to":"alice","quantity":"100.0000 SYS","memo":"memo"}
>> transfer
# olga<= olga.token::transfer {"from":"olga","to":"alice","quantity":"100.0000 SYS","memo":"memo"}
# user <= olga.token::transfer {"from":"olga","to":"alice","quantity":"100.0000 SYS","memo":"memo"}
The output contains one
issue action and three transfer actions. At issue run time, three internal calls are additionally generated notifying the sender and receiver of tokens.Some tokens can be transferred from the balance of one account to the balance of another account. For example, to transfer an amount of 25 tokens from the «alice» account balance to «bob» account balance you need to use the following command line:
cleos push action olga.token transfer '[ "alice", "bob", "25.0000 SYS", "m" ]' -p [email protected]
To perform this action you need permission from the «alice» sender account — the
-p [email protected] option is available.The transfer of tokens is considered as successfully completed if upon its completion the following information appears in the command window:
executed transaction: ...
# olga.token <= olga.token::transfer {"from":"alice","to":"bob","quantity":"25.0000 SYS","memo":"Here you go bob!"}
>> transfer
# user <= olga.token::transfer {"from":"alice","to":"bob","quantity":"25.0000 SYS","memo":"Here you go bob!"}
# tester <= olga.token::transfer {"from":"alice","to":"bob","quantity":"25.0000 SYS","memo":"Here you go bob!"}
To control the token transfer, you can use the
get_currency_balance call to get the balance data of the sender and the receiver accounts by executing:cleos get currency balance olga.token alice SYS
cleos get currency balance olga.token bob SYS
Last modified 3yr ago