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| 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 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | 40x 40x 40x 40x 40x 2x 2x 1x 1x 2x 2x 1x 1x 2x 2x 1x 1x 2x 2x 1x 1x 3x 1x 1x 1x 6x 2x 2x 1x 1x 1x | import { BlockfrostProvider } from '../../util/BlockfrostProvider/BlockfrostProvider';
import { BlockfrostToCore, blockfrostToProviderError } from '../../util';
import {
Cardano,
EraSummary,
Milliseconds,
NetworkInfoProvider,
Seconds,
StakeSummary,
SupplySummary
} from '@cardano-sdk/core';
import { Schemas } from '@blockfrost/blockfrost-js/lib/types/open-api';
import { handleError } from '@blockfrost/blockfrost-js/lib/utils/errors';
export class BlockfrostNetworkInfoProvider extends BlockfrostProvider implements NetworkInfoProvider {
public async stake(): Promise<StakeSummary> {
try {
const network = await this.blockfrost.network();
return {
active: BigInt(network.stake.active),
live: BigInt(network.stake.live)
};
} catch (error) {
throw blockfrostToProviderError(error);
}
}
public async lovelaceSupply(): Promise<SupplySummary> {
try {
const { supply } = await this.blockfrost.network();
return {
circulating: BigInt(supply.circulating),
total: BigInt(supply.total)
};
} catch (error) {
throw blockfrostToProviderError(error);
}
}
public async ledgerTip(): Promise<Cardano.Tip> {
try {
const block = await this.blockfrost.blocksLatest();
return BlockfrostToCore.blockToTip(block);
} catch (error) {
throw blockfrostToProviderError(error);
}
}
public async protocolParameters(): Promise<Cardano.ProtocolParameters> {
try {
const response = await this.blockfrost.epochsLatestParameters();
return BlockfrostToCore.protocolParameters(response);
} catch (error) {
throw blockfrostToProviderError(error);
}
}
public async genesisParameters(): Promise<Cardano.CompactGenesis> {
return this.blockfrost
.genesis()
.then((response) => ({
activeSlotsCoefficient: response.active_slots_coefficient,
epochLength: response.epoch_length,
maxKesEvolutions: response.max_kes_evolutions,
maxLovelaceSupply: BigInt(response.max_lovelace_supply),
networkId:
response.network_magic === Cardano.NetworkMagics.Mainnet
? Cardano.NetworkId.Mainnet
: Cardano.NetworkId.Testnet,
networkMagic: response.network_magic,
securityParameter: response.security_param,
slotLength: Seconds(response.slot_length),
slotsPerKesPeriod: response.slots_per_kes_period,
systemStart: new Date(response.system_start * 1000),
updateQuorum: response.update_quorum
}))
.catch((error) => {
throw blockfrostToProviderError(error);
});
}
protected async fetchEraSummaries(): Promise<Schemas['network-eras']> {
try {
// Although Blockfrost have the endpoint, the blockfrost-js library don't have a call for it
// https://github.com/blockfrost/blockfrost-js/issues/294
const response = await this.blockfrost.instance<Schemas['network-eras']>('network/eras');
return response.body;
} catch (error) {
throw handleError(error);
}
}
protected async parseEraSummaries(summaries: Schemas['network-eras'], systemStart: Date): Promise<EraSummary[]> {
try {
return summaries.map((r) => ({
parameters: {
epochLength: r.parameters.epoch_length,
slotLength: Milliseconds(r.parameters.slot_length * 1000)
},
start: {
slot: r.start.slot,
time: new Date(systemStart.getTime() + r.start.time * 1000)
}
}));
} catch (error) {
throw handleError(error);
}
}
public async eraSummaries(): Promise<EraSummary[]> {
try {
const { systemStart } = await this.genesisParameters();
const summaries = await this.fetchEraSummaries();
return this.parseEraSummaries(summaries, systemStart);
} catch (error) {
throw blockfrostToProviderError(error);
}
}
}
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