28 lines
790 B
JavaScript
28 lines
790 B
JavaScript
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// @flow
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import * as BufferLayout from 'buffer-layout';
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import * as Layout from './layout';
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/**
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* @typedef {Object} InstructionType
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* @property (index} The Instruction index (from solana upstream program)
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* @property (BufferLayout} The BufferLayout to use to build data
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*/
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export type InstructionType = {|
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index: number,
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layout: typeof BufferLayout,
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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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*/
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export function encodeData(type: InstructionType, fields: Object): 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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