feat: add VersionedMessage.deserializeMessageVersion utility function (#27415)
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@ -5,17 +5,26 @@ import {MessageV0} from './v0';
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export type VersionedMessage = Message | MessageV0;
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// eslint-disable-next-line no-redeclare
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export const VersionedMessage = {
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deserialize: (serializedMessage: Uint8Array): VersionedMessage => {
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deserializeMessageVersion(serializedMessage: Uint8Array): 'legacy' | number {
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const prefix = serializedMessage[0];
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const maskedPrefix = prefix & VERSION_PREFIX_MASK;
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// if the highest bit of the prefix is not set, the message is not versioned
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if (maskedPrefix === prefix) {
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return Message.from(serializedMessage);
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return 'legacy';
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}
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// the lower 7 bits of the prefix indicate the message version
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const version = maskedPrefix;
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return maskedPrefix;
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},
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deserialize: (serializedMessage: Uint8Array): VersionedMessage => {
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const version =
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VersionedMessage.deserializeMessageVersion(serializedMessage);
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if (version === 'legacy') {
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return Message.from(serializedMessage);
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}
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if (version === 0) {
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return MessageV0.deserialize(serializedMessage);
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} else {
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@ -0,0 +1,28 @@
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import {expect} from 'chai';
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import {VersionedMessage} from '../../src/message';
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describe('VersionedMessage', () => {
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it('deserializeMessageVersion', () => {
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const bufferWithLegacyPrefix = new Uint8Array([1]);
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expect(
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VersionedMessage.deserializeMessageVersion(bufferWithLegacyPrefix),
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).to.eq('legacy');
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for (const version of [0, 1, 127]) {
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const bufferWithVersionPrefix = new Uint8Array([(1 << 7) + version]);
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expect(
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VersionedMessage.deserializeMessageVersion(bufferWithVersionPrefix),
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).to.eq(version);
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}
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});
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it('deserialize failure', () => {
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const bufferWithV1Prefix = new Uint8Array([(1 << 7) + 1]);
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expect(() => {
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VersionedMessage.deserialize(bufferWithV1Prefix);
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}).to.throw(
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'Transaction message version 1 deserialization is not supported',
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);
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});
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});
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