Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | 50x 50x 50x 50x 6x 4x 1x 1x 3x 1x 2x 1x 1x 50x 50x 3x | import { AvailableNetworks } from '../../Program';
import { BlockFrostAPI } from '@blockfrost/blockfrost-js';
import {
BlockfrostClient,
DEFAULT_BLOCKFROST_API_VERSION,
DEFAULT_BLOCKFROST_RATE_LIMIT_CONFIG,
DEFAULT_BLOCKFROST_URLS
} from '@cardano-sdk/cardano-services-client';
import Bottleneck from 'bottleneck';
let blockfrostApi: BlockFrostAPI | undefined;
let blockfrostClient: BlockfrostClient | undefined;
/**
* Gets the singleton blockfrost API instance.
*
* @returns The blockfrost API instance, this function always returns the same instance.
*/
export const getBlockfrostApi = () => {
if (blockfrostApi !== undefined) return blockfrostApi;
// custom hosted instance
if (process.env.BLOCKFROST_CUSTOM_BACKEND_URL && process.env.BLOCKFROST_CUSTOM_BACKEND_URL !== '') {
blockfrostApi = new BlockFrostAPI({
customBackend: process.env.BLOCKFROST_CUSTOM_BACKEND_URL,
rateLimiter: false
});
return blockfrostApi;
}
// instance hosted by Blockfrost
if (process.env.BLOCKFROST_API_KEY === undefined || process.env.BLOCKFROST_API_KEY === '')
throw new Error('BLOCKFROST_API_KEY or BLOCKFROST_CUSTOM_BACKEND_URL environment variable is required');
if (process.env.NETWORK === undefined) throw new Error('NETWORK environment variable is required');
// network is not mandatory, we keep it for safety.
blockfrostApi = new BlockFrostAPI({
network: process.env.NETWORK as AvailableNetworks,
projectId: process.env.BLOCKFROST_API_KEY,
rateLimiter: false
});
return blockfrostApi;
};
/**
* Gets the singleton blockfrost API instance.
*
* @returns The blockfrost API instance, this function always returns the same instance.
*/
export const getBlockfrostClient = (): BlockfrostClient => {
Iif (blockfrostClient !== undefined) return blockfrostClient;
// custom hosted instance
Iif (process.env.BLOCKFROST_CUSTOM_BACKEND_URL) {
blockfrostClient = new BlockfrostClient(
{ apiVersion: DEFAULT_BLOCKFROST_API_VERSION, baseUrl: process.env.BLOCKFROST_CUSTOM_BACKEND_URL },
{ rateLimiter: { schedule: (task) => task() } }
);
return blockfrostClient;
}
// instance hosted by Blockfrost
Iif (!process.env.BLOCKFROST_API_KEY)
throw new Error('BLOCKFROST_API_KEY or BLOCKFROST_CUSTOM_BACKEND_URL environment variable is required');
Iif (!process.env.NETWORK) throw new Error('NETWORK environment variable is required');
const baseUrl = DEFAULT_BLOCKFROST_URLS[process.env.NETWORK as keyof typeof DEFAULT_BLOCKFROST_URLS];
Iif (!baseUrl) throw new Error(`Unsupported NETWORK for blockfrost: ${process.env.NETWORK}`);
// network is not mandatory, we keep it for safety.
blockfrostClient = new BlockfrostClient(
{ apiVersion: DEFAULT_BLOCKFROST_API_VERSION, baseUrl, projectId: process.env.BLOCKFROST_API_KEY },
{
rateLimiter: new Bottleneck({
reservoir: DEFAULT_BLOCKFROST_RATE_LIMIT_CONFIG.size,
reservoirIncreaseAmount: DEFAULT_BLOCKFROST_RATE_LIMIT_CONFIG.increaseAmount,
reservoirIncreaseInterval: DEFAULT_BLOCKFROST_RATE_LIMIT_CONFIG.increaseInterval,
reservoirIncreaseMaximum: DEFAULT_BLOCKFROST_RATE_LIMIT_CONFIG.size
})
}
);
return blockfrostClient;
};
// for testing purpose
export const clearBlockfrostApi = () => {
if (blockfrostApi !== undefined) blockfrostApi = undefined;
};
|