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Swap to use the Helper Function to create policies (#908)

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The old way used the direct protobuf functions, there is a helper function
in the chaincode does exactly that.

Signed-off-by: Matthew B White <whitemat@uk.ibm.com>
This commit is contained in:
Matthew B White 2023-01-18 12:25:07 +00:00 committed by GitHub
parent a70547dd94
commit e7d3b41287
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1 changed files with 8 additions and 37 deletions
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45
asset-transfer-sbe/chaincode-typescript/src/assetContract.ts
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@ -5,7 +5,6 @@
import { Context, Contract, Info, Transaction } from 'fabric-contract-api';
import { Asset } from './asset';
import { KeyEndorsementPolicy } from 'fabric-shim';
import * as fabprotos from 'fabric-shim/bundle';
@Info({title: 'AssetContract', description: 'Asset Transfer Smart Contract, using State Based Endorsement(SBE), implemented in TypeScript' })
export class AssetContract extends Contract {
@ -111,42 +110,14 @@ export class AssetContract extends Contract {
// setStateBasedEndorsementNOutOf sets an endorsement policy to the assetId Key
// setStateBasedEndorsementNOutOf enforces that a given number of Orgs (N) out of the specified Orgs must endorse future update transactions for the specified assetId Key.
private static async setStateBasedEndorsementNOutOf(ctx: Context, assetId: string, nOrgs:number, ownerOrgs: string[]): Promise<void> {
await ctx.stub.setStateValidationParameter(assetId, AssetContract.policy(nOrgs, ownerOrgs));
const ROLE_TYPE_MEMBER = 'MEMBER';
// Use the KeyEndorsementPolicy helper form the chaincode libarries
// If you need more advanced policies, please use that helper as a reference point.
const keyEndorsementPolicy = new KeyEndorsementPolicy();
keyEndorsementPolicy.addOrgs(ROLE_TYPE_MEMBER,...ownerOrgs);
await ctx.stub.setStateValidationParameter(assetId, keyEndorsementPolicy.getPolicy());
}
// Create a policy that requires a given number (N) of Org principals signatures out of the provided list of Orgs
private static policy(nOrgs: number, mspIds: string[]): Uint8Array {
const principals = [];
const sigsPolicies = [];
mspIds.forEach((mspId, i) => {
const mspRole = {
role: fabprotos.common.MSPRole.MSPRoleType.MEMBER,
mspIdentifier: mspId
};
const principal = {
principalClassification: fabprotos.common.MSPPrincipal.Classification.ROLE,
principal: fabprotos.common.MSPRole.encode(mspRole).finish()
};
principals.push(principal);
const signedBy = {
signedBy: i,
};
sigsPolicies.push(signedBy);
});
// Create the policy such that it requires any N signature's from all of the principals provided
const allOf = {
n: nOrgs,
rules: sigsPolicies
};
const noutof = {
nOutOf: allOf
};
const spe = {
version: 0,
rule: noutof,
identities: principals
};
return fabprotos.common.SignaturePolicyEnvelope.encode(spe).finish();
}
}