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6655e35 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | import {Buffer} from 'buffer';
import * as BufferLayout from '@solana/buffer-layout';
import {VoteAuthorizeWithSeedArgs} from './programs/vote';
/**
* Layout for a public key
*/
export const publicKey = (property: string = 'publicKey') => {
return BufferLayout.blob(32, property);
};
/**
* Layout for a signature
*/
export const signature = (property: string = 'signature') => {
return BufferLayout.blob(64, property);
};
/**
* Layout for a 64bit unsigned value
*/
export const uint64 = (property: string = 'uint64') => {
return BufferLayout.blob(8, property);
};
interface IRustStringShim
extends Omit<
BufferLayout.Structure<
Readonly<{
length: number;
lengthPadding: number;
chars: Uint8Array;
}>
>,
'decode' | 'encode' | 'replicate'
> {
alloc: (str: string) => number;
decode: (b: Uint8Array, offset?: number) => string;
encode: (str: string, b: Uint8Array, offset?: number) => number;
replicate: (property: string) => this;
}
/**
* Layout for a Rust String type
*/
export const rustString = (
property: string = 'string',
): BufferLayout.Layout<string> => {
const rsl = BufferLayout.struct<
Readonly<{
length?: number;
lengthPadding?: number;
chars: Uint8Array;
}>
>(
[
BufferLayout.u32('length'),
BufferLayout.u32('lengthPadding'),
BufferLayout.blob(BufferLayout.offset(BufferLayout.u32(), -8), 'chars'),
],
property,
);
const _decode = rsl.decode.bind(rsl);
const _encode = rsl.encode.bind(rsl);
const rslShim = rsl as unknown as IRustStringShim;
rslShim.decode = (b: Uint8Array, offset?: number) => {
const data = _decode(b, offset);
return data['chars'].toString();
};
rslShim.encode = (str: string, b: Uint8Array, offset?: number) => {
const data = {
chars: Buffer.from(str, 'utf8'),
};
return _encode(data, b, offset);
};
rslShim.alloc = (str: string) => {
return (
BufferLayout.u32().span +
BufferLayout.u32().span +
Buffer.from(str, 'utf8').length
);
};
return rslShim;
};
/**
* Layout for an Authorized object
*/
export const authorized = (property: string = 'authorized') => {
return BufferLayout.struct<
Readonly<{
staker: Uint8Array;
withdrawer: Uint8Array;
}>
>([publicKey('staker'), publicKey('withdrawer')], property);
};
/**
* Layout for a Lockup object
*/
export const lockup = (property: string = 'lockup') => {
return BufferLayout.struct<
Readonly<{
custodian: Uint8Array;
epoch: number;
unixTimestamp: number;
}>
>(
[
BufferLayout.ns64('unixTimestamp'),
BufferLayout.ns64('epoch'),
publicKey('custodian'),
],
property,
);
};
/**
* Layout for a VoteInit object
*/
export const voteInit = (property: string = 'voteInit') => {
return BufferLayout.struct<
Readonly<{
authorizedVoter: Uint8Array;
authorizedWithdrawer: Uint8Array;
commission: number;
nodePubkey: Uint8Array;
}>
>(
[
publicKey('nodePubkey'),
publicKey('authorizedVoter'),
publicKey('authorizedWithdrawer'),
BufferLayout.u8('commission'),
],
property,
);
};
/**
* Layout for a VoteAuthorizeWithSeedArgs object
*/
export const voteAuthorizeWithSeedArgs = (
property: string = 'voteAuthorizeWithSeedArgs',
) => {
return BufferLayout.struct<VoteAuthorizeWithSeedArgs>(
[
BufferLayout.u32('voteAuthorizationType'),
publicKey('currentAuthorityDerivedKeyOwnerPubkey'),
rustString('currentAuthorityDerivedKeySeed'),
publicKey('newAuthorized'),
],
property,
);
};
export function getAlloc(type: any, fields: any): number {
const getItemAlloc = (item: any): number => {
if (item.span >= 0) {
return item.span;
} else if (typeof item.alloc === 'function') {
return item.alloc(fields[item.property]);
} else if ('count' in item && 'elementLayout' in item) {
const field = fields[item.property];
if (Array.isArray(field)) {
return field.length * getItemAlloc(item.elementLayout);
}
} else if ('fields' in item) {
// This is a `Structure` whose size needs to be recursively measured.
return getAlloc({layout: item}, fields[item.property]);
}
// Couldn't determine allocated size of layout
return 0;
};
let alloc = 0;
type.layout.fields.forEach((item: any) => {
alloc += getItemAlloc(item);
});
return alloc;
}
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