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https://github.com/hyperledger/fabric-samples.git
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Decorate Typescript Chaincode
Add the contract-api specific annotations and enable the experimental features. Also properly format code according to the linter Signed-off-by: Brett Logan <brett.t.logan@ibm.com>
This commit is contained in:
Brett Logan
denyeart
parent
66b4b2b86a
commit
e31ecf3165
5 changed files with 64 additions and 46 deletions
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@ -1,12 +1,26 @@
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/*
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* SPDX-License-Identifier: Apache-2.0
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*/
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SPDX-License-Identifier: Apache-2.0
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*/
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import {Object, Property} from 'fabric-contract-api';
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@Object()
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export class Asset {
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@Property()
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public docType?: string;
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@Property()
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public ID: string;
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@Property()
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public Color: string;
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@Property()
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public Size: number;
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@Property()
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public Owner: string;
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@Property()
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public AppraisedValue: number;
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}
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@ -2,65 +2,67 @@
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* SPDX-License-Identifier: Apache-2.0
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*/
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import { Context, Contract } from 'fabric-contract-api';
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import { Asset } from './asset';
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import {Context, Contract, Returns, Transaction} from 'fabric-contract-api';
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import {Asset} from './asset';
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export class AssetTransfer extends Contract {
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@Transaction()
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public async initLedger(ctx: Context) {
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const assets: Asset[] = [
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{
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ID: "asset1",
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Color: "blue",
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ID: 'asset1',
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Color: 'blue',
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Size: 5,
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Owner: "Tomoko",
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Owner: 'Tomoko',
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AppraisedValue: 300,
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},
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{
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ID: "asset2",
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Color: "red",
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ID: 'asset2',
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Color: 'red',
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Size: 5,
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Owner: "Brad",
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Owner: 'Brad',
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AppraisedValue: 400,
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},
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{
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ID: "asset3",
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Color: "green",
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ID: 'asset3',
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Color: 'green',
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Size: 10,
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Owner: "Jin Soo",
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Owner: 'Jin Soo',
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AppraisedValue: 500,
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},
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{
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ID: "asset4",
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Color: "yellow",
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ID: 'asset4',
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Color: 'yellow',
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Size: 10,
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Owner: "Max",
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Owner: 'Max',
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AppraisedValue: 600,
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},
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{
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ID: "asset5",
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Color: "black",
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ID: 'asset5',
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Color: 'black',
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Size: 15,
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Owner: "Adriana",
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Owner: 'Adriana',
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AppraisedValue: 700,
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},
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{
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ID: "asset6",
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Color: "white",
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ID: 'asset6',
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Color: 'white',
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Size: 15,
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Owner: "Michel",
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Owner: 'Michel',
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AppraisedValue: 800,
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},
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];
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for (let i = 0; i < assets.length; i++) {
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assets[i].docType = 'asset';
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await ctx.stub.putState(assets[i].ID, Buffer.from(JSON.stringify(assets[i])));
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console.info('Added <--> ', assets[i]);
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for (const asset of assets) {
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asset.docType = 'asset';
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await ctx.stub.putState(asset.ID, Buffer.from(JSON.stringify(asset)));
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console.info(`Asset ${asset.ID} initialized`);
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}
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}
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// createAsset issues a new asset to the world state with given details.
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@Transaction()
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public async createAsset(ctx: Context, id: string, color: string, size: number, owner: string, appraisedValue: number) {
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const asset = {
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ID: id,
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@ -69,73 +71,72 @@ export class AssetTransfer extends Contract {
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Owner: owner,
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AppraisedValue: appraisedValue,
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};
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await ctx.stub.putState(id, Buffer.from(JSON.stringify(asset)));
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}
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// readAsset returns the asset stored in the world state with given id.
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@Transaction(false)
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public async readAsset(ctx: Context, id: string): Promise<string> {
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const assetJSON = await ctx.stub.getState(id); // get the asset from chaincode state
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if (!assetJSON || assetJSON.length === 0) {
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throw new Error(`The asset ${id} does not exist`);
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}
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return assetJSON.toString();
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}
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// updateAsset updates an existing asset in the world state with provided parameters.
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@Transaction()
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public async updateAsset(ctx: Context, id: string, color: string, size: number, owner: string, appraisedValue: number) {
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const exists = await this.assetExists(ctx, id);
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if (!exists) {
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throw new Error(`The asset ${id} does not exist`);
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}
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// overwritting original asset with new asset
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let updatedAsset = {
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// overwriting original asset with new asset
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const updatedAsset = {
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ID: id,
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Color: color,
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Size: size,
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Owner: owner,
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AppraisedValue: appraisedValue,
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};
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return ctx.stub.putState(id, Buffer.from(JSON.stringify(updatedAsset)));
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}
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// deleteAsset deletes an given asset from the world state.
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@Transaction()
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public async deleteAsset(ctx: Context, id: string) {
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const exists = await this.assetExists(ctx, id);
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if (!exists) {
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throw new Error(`The asset ${id} does not exist`);
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}
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return ctx.stub.deleteState(id);
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}
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// assetExists returns true when asset with given ID exists in world state.
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@Transaction(false)
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@Returns('boolean')
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public async assetExists(ctx: Context, id: string): Promise<boolean> {
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const assetJSON = await ctx.stub.getState(id);
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if (!assetJSON || assetJSON.length === 0) {
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return false;
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}
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return true;
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return assetJSON && assetJSON.length > 0;
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}
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// transferAsset updates the owner field of asset with given id in the world state.
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@Transaction()
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public async transferAsset(ctx: Context, id: string, newOwner: string) {
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let assetString = await this.readAsset(ctx, id);
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let asset = JSON.parse(assetString);
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const assetString = await this.readAsset(ctx, id);
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const asset = JSON.parse(assetString);
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asset.Owner = newOwner;
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await ctx.stub.putState(id, Buffer.from(JSON.stringify(asset)));
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}
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// getAllAssets returns all assets found in the world state.
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@Transaction(false)
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@Returns('string')
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public async getAllAssets(ctx: Context): Promise<string> {
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const allResults = [];
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// range query with empty string for startKey and endKey does an open-ended query of all assets in the chaincode namespace.
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for await (const { key, value } of ctx.stub.getStateByRange("", "")) {
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for await (const {key, value} of ctx.stub.getStateByRange('', '')) {
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const strValue = Buffer.from(value).toString('utf8');
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let record;
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try {
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@ -144,9 +145,8 @@ export class AssetTransfer extends Contract {
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console.log(err);
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record = strValue;
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}
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allResults.push({ Key: key, Record: record });
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allResults.push({Key: key, Record: record});
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}
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console.info(allResults);
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return JSON.stringify(allResults);
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}
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@ -2,7 +2,8 @@
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* SPDX-License-Identifier: Apache-2.0
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*/
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import { AssetTransfer } from './assetTransfer';
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export { AssetTransfer } from './assetTransfer';
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import {AssetTransfer} from './assetTransfer';
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export {AssetTransfer} from './assetTransfer';
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export const contracts: any[] = [AssetTransfer];
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@ -1,5 +1,6 @@
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{
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"compilerOptions": {
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"experimentalDecorators": true,
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"outDir": "dist",
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"target": "es2017",
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"moduleResolution": "node",
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@ -15,7 +15,9 @@
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"no-string-throw": true,
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"no-var-keyword": true,
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"no-trailing-whitespace": true,
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"object-literal-key-quotes": [true, "as-needed"]
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"object-literal-key-quotes": [true, "as-needed"],
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"object-literal-sort-keys": false,
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"max-line-length": false
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},
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"rulesDirectory": []
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}
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