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@cardano-sdk/cip2
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This package implements concepts from the draft specification being developed in CIP-0002.
Currently there is only 1 input selection algorithm: RoundRobinRandomImprove, which is a Random-Improve adaptation that handles asset selection.
import { roundRobinRandomImprove, defaultSelectionConstraints, InputSelector, SelectionResult, SelectionSkeleton } from '@cardano-sdk/cip2';
import { loadCardanoSerializationLib, CSL, CardanoSerializationLib, ProtocolParametersRequiredByWallet } from '@cardano-sdk/core';
const demo = async (protocolParameters: ProtocolParametersRequiredByWallet): Promise<SelectionResult> => {
const csl: CardanoSerializationLib = await loadCardanoSerializationLib();
const selector: InputSelector = roundRobinRandomImprove(coinsPerUtxoWord);
// It is important that you use the same instance of cardano-serialization-lib across your application.
// Bad: TransactionUnspentOutput.new(...)
// Good: CSL.TransactionUnspentOutput.new(...)
const utxo: CSL.TransactionUnspentOutput[] = [CSL.TransactionUnspentOutput.new(...), ...];
const outputs: CSL.TransactionOutput[] = [CSL.TransactionOutput.new(...), ...];
// Used to estimate min fee and validate transaction size
const buildTx = (inputSelection: SelectionSkeleton): Promise<CSL.Transaction> => {...};
const constraints = defaultSelectionConstraints({
protocolParameters, buildTx,
});
return selector.select({
utxo,
outputs,
constraints,
});
};
Input selection is tested with property-based tests using fast-check, as well as a few regular example-based tests.
Due to nature of property-based tests, code coverage report is slightly different on each build.
RoundRobinRandomImprove has 100% code coverage when using high numRuns
option (e.g. 100_000).
Note that to run it with high numRuns
you need to increase Jest and fast-check timeout.
See code coverage report.
FAQs
TypeScript definitions for CIP2 (Coin Selection Algorithms for Cardano)
The npm package @cardano-sdk/cip2 receives a total of 1 weekly downloads. As such, @cardano-sdk/cip2 popularity was classified as not popular.
We found that @cardano-sdk/cip2 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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