@solana/spl-token/lib/esm/serialization.js

SPL Token Program JS API

import { Layout } from '@solana/buffer-layout';
import { publicKey } from '@solana/buffer-layout-utils';
export class COptionPublicKeyLayout extends Layout {
    constructor(property) {
        super(-1, property);
        this.publicKeyLayout = publicKey();
    }
    decode(buffer, offset = 0) {
        const option = buffer[offset];
        if (option === 0) {
            return null;
        }
        return this.publicKeyLayout.decode(buffer, offset + 1);
    }
    encode(src, buffer, offset = 0) {
        if (src === null) {
            buffer[offset] = 0;
            return 1;
        }
        else {
            buffer[offset] = 1;
            this.publicKeyLayout.encode(src, buffer, offset + 1);
            return 33;
        }
    }
    getSpan(buffer, offset = 0) {
        if (buffer) {
            const option = buffer[offset];
            return option === 0 ? 1 : 1 + this.publicKeyLayout.span;
        }
        throw new RangeError('Buffer must be provided');
    }
}
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