2. 数字资产交易¶
代码样例参看:contractsdk/go/example/erc721.go
或使用超级链XuperOS,其已发布丰富的合约模板,涵盖溯源、存证、积分、去中心化等多行业模板。 点击了解
2.1. ERC721简介¶
ERC721是数字资产合约,交易的商品是非同质性商品。其中,每一份资产,也就是token_id都是独一无二的类似收藏品交易。
2.2. ERC721具备哪些功能¶
- 通过initialize方法,向交易池注入自己的token_id
注意token_id必须是全局唯一
- 通过invoke方法,执行不同的交易功能
transfer: userA将自己的某个收藏品token_id转给userB
approve: userA将自己的某个收藏品token_id的售卖权限授予userB
transferFrom: userB替userA将赋予权限的收藏品token_id卖给userC
pproveAll: userA将自己的所有收藏品token_id的售卖权限授予userB
- 通过query方法,执行不同的查询功能
balanceOf: userA的所有收藏品的数量
totalSupply: 交易池中所有的收藏品的数量
approvalOf: userA授权给userB的收藏品的数量
2.3. 调用json文件示例¶
Initialize
./xchain-cli wasm invoke -a ‘下面json中args字段的内容’ –method initialize -H localhost:37101 erc721
1 2 3 4 5 6 7 8 9 | {
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "initialize", # initialize or query or invoke
"args": {
"from": "dudu", # userName
"supply": "1,2" # token_ids
}
}
|
Invoke
./xchain-cli native invoke -a ‘args内容’ –method invoke -H localhost:37101 erc721
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | {
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "invoke", # initialize or query or invoke
"args": {
"action": "transfer", # action name
"from": "dudu", # usera
"to": "chengcheng", # userb
"token_id": "1" # token_ids
}
}
{
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "invoke", # initialize or query or invoke
"args": {
"action": "transferFrom", # action name
"from": "dudu", # userA
"caller": "chengcheng", # userB
"to": "miaomiao", # userC
"token_id": "1" # token_ids
}
}
{
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "invoke", # initialize or query or invoke
"args": {
"action": "approve", # action name
"from": "dudu", # userA
"to": "chengcheng", # userB
"token_id": "1" # token_ids
}
}
|
Query
./xchain-cli native query -a ‘args内容’ –method query -H localhost:37101 erc721
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | {
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "query", # initialize or query or invoke
"args": {
"action": "balanceOf", # action name
"from": "dudu" # userA
}
}
{
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "query", # initialize or query or invoke
"args": {
"action": "totalSupply" # action name
}
}
{
"module_name": "native", # native或wasm
"contract_name": "erc721", # contract name
"method_name": "query", # initialize or query or invoke
"args": {
"action": "approvalOf", # action name
"from": "dudu", # userA
"to": "chengcheng" # userB
}
}
|