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@dfinity/cmc
Advanced tools
A library for interfacing with the cycle minting canister.
You can use cmc-js
by installing it in your project.
npm i @dfinity/cmc
The bundle needs peer dependencies, be sure that following resources are available in your project as well.
npm i @dfinity/agent @dfinity/candid @dfinity/principal @dfinity/utils
The features are available through the class CMCCanister
. It has to be instantiated with the canister ID of the cycles minting canister. On mainnet
, its ID is rkp4c-7iaaa-aaaaa-aaaca-cai
.
e.g. querying the current Icp to cycles conversion rate.
import { CMCCanister } from "@dfinity/cmc";
import { createAgent } from "@dfinity/utils";
const agent = await createAgent({
identity,
host: HOST,
});
const { getIcpToCyclesConversionRate } = CMCCanister.create({
agent,
canisterId: CYCLES_MINTING_CANISTER_ID,
});
const rate = await getIcpToCyclesConversionRate();
cmc-js
implements following features:
Method | Type |
---|---|
create | (options: CMCCanisterOptions) => CMCCanister |
Returns conversion rate of ICP to Cycles
Method | Type |
---|---|
getIcpToCyclesConversionRate | () => Promise<bigint> |
Notifies Cycles Minting Canister of the creation of a new canister. It returns the new canister principal.
Method | Type |
---|---|
notifyCreateCanister | (request: NotifyCreateCanisterArg) => Promise<Principal> |
Notifies Cycles Minting Canister of new cycles being added to canister. It returns the new Cycles of the canister.
Method | Type |
---|---|
notifyTopUp | (request: NotifyTopUpArg) => Promise<bigint> |
This function calls the get_default_subnets
method of the CMC canister, which returns a list of
default subnets as Principal
objects. It can be called as query or update.
Method | Type |
---|---|
getDefaultSubnets | ({ certified }?: QueryParams) => Promise<Principal[]> |
Parameters:
params
: - The query parameters for the call.params.certified
: - Determines whether the response should be certified
(default: non-certified if not specified).This function calls the get_subnet_types_to_subnets
method of the CMC canister, which returns a list of subnets where canisters can be created.
These subnets are excluded from the random subnet selection process used by the CMC when no explicit subnet ID is provided
during canister creation and therefore, not provided in the results of the similar function get_default_subnets
.
Method | Type |
---|---|
getSubnetTypesToSubnets | ({ certified, }?: QueryParams) => Promise<SubnetTypesToSubnetsResponse> |
Parameters:
params
: - The optional query parameters for the call.params.certified
: - Specifies whether the response should be certified.
If not provided, the response defaults to non-certified.FAQs
A library for interfacing with the cycle minting canister.
The npm package @dfinity/cmc receives a total of 2,395 weekly downloads. As such, @dfinity/cmc popularity was classified as popular.
We found that @dfinity/cmc demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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