4fb1c9da26
* fix: update buffer-layout to fix downstream bundler issues * chore: run check on generated type declaration
49 lines
1.2 KiB
TypeScript
49 lines
1.2 KiB
TypeScript
import {Buffer} from 'buffer';
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import * as BufferLayout from '@solana/buffer-layout';
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import * as Layout from './layout';
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/**
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* @internal
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*/
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export type InstructionType = {
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/** The Instruction index (from solana upstream program) */
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index: number;
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/** The BufferLayout to use to build data */
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layout: BufferLayout.Layout;
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};
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/**
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* Populate a buffer of instruction data using an InstructionType
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* @internal
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*/
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export function encodeData(type: InstructionType, fields?: any): Buffer {
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const allocLength =
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type.layout.span >= 0 ? type.layout.span : Layout.getAlloc(type, fields);
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const data = Buffer.alloc(allocLength);
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const layoutFields = Object.assign({instruction: type.index}, fields);
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type.layout.encode(layoutFields, data);
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return data;
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}
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/**
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* Decode instruction data buffer using an InstructionType
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* @internal
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*/
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export function decodeData(type: InstructionType, buffer: Buffer): any {
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let data;
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try {
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data = type.layout.decode(buffer);
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} catch (err) {
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throw new Error('invalid instruction; ' + err);
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}
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if (data.instruction !== type.index) {
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throw new Error(
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`invalid instruction; instruction index mismatch ${data.instruction} != ${type.index}`,
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);
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}
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return data;
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}
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