oceanprotocol/ocean.js
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Update README_simpleflow.md

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Alex Coseru 2020-05-22 12:16:55 +03:00 committed by GitHub
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@ -41,61 +41,62 @@ For now, you're Alice:) Let's proceed.
const { Ocean, Logger } = require('@oceanprotocol/lib') const { Ocean, Logger } = require('@oceanprotocol/lib')
const config={ const config={
network: 'rinkeby', network: 'rinkeby',
privateKey:'8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f' privateKey:'8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f',
providerUri: 'localhost:8030' //this is the provider URL
} }
const ocean = Ocean(config) const ocean = Ocean(alice_config)
const account = await ocean.accounts.list()[0] const account = await ocean.accounts.list()[0]
const myToken = ocean.datatoken.create('123.com',account) const myToken = ocean.datatoken.create('localhost:8030',account)
console.log(myToken.getAddress())
``` ```
## 2. Alice mints 100 tokens ## 2.Alice hosts a dataset
A locally providerService is required, which will serve just one file for this demo.
Let's create the file to be shared:
```
touch /var/mydata/myFolder1/file
````
Run the providerService:
(given that ERC20 contract address from the above is 0x1234)
```
ENV DT="{'0x1234':'/var/mydata/myFolder1'}"
docker run @oceanprotocol/provider-py -e CONFIG=DT
```
## 3. Alice mints 100 tokens
```javascript ```javascript
myToken.mint(100) myToken.mint(100)
``` ```
## 3. Alice transfers 1 token to Bob ## 4. Alice transfers 1 token to Bob
```javascript ```javascript
myToken.transfer(1,BobAddress) myToken.transfer(1,BobAddress)
``` ```
## 4. Bob consumes dataset ## 5. Bob consumes dataset
Now, you are Bob :) Now, you are Bob :)
Given then the provider serves only one file, it will serve the same file for any ERC20 DT
```javascript ```javascript
const config={ const bob_config={
network: 'rinkeby', network: 'rinkeby',
privateKey:'8da4ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f' privateKey:'1234ef21b864d2cc526dbdb2a120bd2874c36c9d0a1fb7f8c63d7f7a8b41de8f'
} }
const ocean = Ocean(config) const bob_ocean = Ocean(bob_config)
const account = await ocean.accounts.list()[0] const account = await bob_ocean.accounts.list()[0]
const myToken = ocean.datatoken.load(erc20_address) const asset=bob_ocean.assets.load(dt_address)
const asset=ocean.assets.loadFromDataToken(myToken) const file=bob_ocean.assets.download(asset,account)
const file=ocean.assets.download(asset,account)
``` ```
where
```javascript
class assets{
let ERC20address;
function loadFromDataToken(erc20_address){
this.ERC20address=erc20_address
}
async function download(account){
const publisher = Ocean.publisher.loadFromERC20(this.ERC20address)
const transaction = publisher.prepare(this.ERC20address)
await account.signTransaction(transaction)
const file=await publisher.download(this.ERC20address)
return file
}
}
```
Disclaimer: this is a logical flow only