tickethead-sdk
Version:
SDK for the Tickethead API
126 lines • 5.41 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.BlockchainService = void 0;
const signer_1 = require("./signer");
const converter_1 = require("../common/converter");
/**
* Service class for blockchain transactions.
*/
class BlockchainService {
constructor(client, version) {
this.client = client;
this.version = version;
}
/**
* Returns true if the service is reachable
*
* @returns Services' online status
*/
health() {
return __awaiter(this, void 0, void 0, function* () {
try {
const res = yield this.client.get(`event/health`);
if (res.data.status === 'ok') {
return { online: true };
}
}
catch (e) {
// Do nothing
}
return { online: false };
});
}
/**
* This is the first step in committing data to the blockchain.
* Creates a new proposal which need to be signed with the private key.
*
* @param proposal New proposal data
* @returns Digest hash of the proposal
*/
createProposal(proposal) {
return __awaiter(this, void 0, void 0, function* () {
// The payload is snake cased because chaincode consumes it
const res = yield this.client.post(`blockchain/${this.version}/transaction/proposal`, Object.assign(Object.assign({}, proposal), { args: [JSON.stringify((0, converter_1.toSnakeCase)(proposal.args))] }));
return res.data.data;
});
}
/**
* This is the second step in committing data to the blockchain.
* Submits the proposal signature so that it can be endorsed.
* It is signed with the user's private key.
*
* @param proposal Proposal's digest and signature
* @returns Transaction (tx) digest, used in the commit transaction step
*/
createTransaction(proposal) {
return __awaiter(this, void 0, void 0, function* () {
const res = yield this.client.post(`blockchain/${this.version}/transaction/proposal/${proposal.digest}`, { signature: proposal.signature });
return res.data.data;
});
}
/**
* Third and final step in creating a transaction.
* Commits a transaction. Once a proposal is submitted,
* signed and endorsed it can be committed as a transaction to the blockchain.
*
* @param tx Signed transaction
* @returns Status of the transaction
*/
commitTransaction(tx) {
return __awaiter(this, void 0, void 0, function* () {
const res = yield this.client.post(`blockchain/${this.version}/transaction/${tx.digest}`, { signature: tx.signature });
return res.data.data;
});
}
/**
* Creates a proposal, signs it and commits it to the blockchain.
*
* @param proposal Transaction proposal containing the bc function and arguments
* @param keys Private key and certificate to sign the intermediate steps
* @returns Transaction commit status
*/
sendTransaction(proposal, keys) {
return __awaiter(this, void 0, void 0, function* () {
const proposalDigest = yield this.createProposal({
fcn: proposal.fcn,
certificate: keys.certificate,
args: proposal.args,
});
const proposalSignature = (0, signer_1.signDigest)(keys.privateKey, proposalDigest.digest);
const txDigest = yield this.createTransaction({
digest: proposalDigest.digest,
signature: proposalSignature,
});
const txSignature = (0, signer_1.signDigest)(keys.privateKey, txDigest.digest);
return this.commitTransaction({
digest: txDigest.digest,
signature: txSignature,
});
});
}
/**
* Sends online transaction to the blockchain service.
*
* @param proposal Transaction proposal containing the bc function and arguments
* @param keys Private key and certificate for which the transaction should be invoked.
* @returns Response from the chaincode.
*/
sendOnlineTransaction(proposal, keys) {
return __awaiter(this, void 0, void 0, function* () {
const body = Object.assign(Object.assign(Object.assign({}, proposal), keys), { args: [JSON.stringify((0, converter_1.toSnakeCase)(proposal.args))] });
const res = yield this.client.post(`blockchain/${this.version}/transaction`, body);
return res.data.data;
});
}
}
exports.BlockchainService = BlockchainService;
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