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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/viem/_esm/utils/abi
Просмотр файла: encodeAbiParameters.js
import { AbiEncodingArrayLengthMismatchError, AbiEncodingBytesSizeMismatchError, AbiEncodingLengthMismatchError, InvalidAbiEncodingTypeError, InvalidArrayError, } from '../../errors/abi.js';
import { InvalidAddressError, } from '../../errors/address.js';
import { BaseError } from '../../errors/base.js';
import { IntegerOutOfRangeError } from '../../errors/encoding.js';
import { isAddress } from '../address/isAddress.js';
import { concat } from '../data/concat.js';
import { padHex } from '../data/pad.js';
import { size } from '../data/size.js';
import { slice } from '../data/slice.js';
import { boolToHex, numberToHex, stringToHex, } from '../encoding/toHex.js';
import { integerRegex } from '../regex.js';
/**
* @description Encodes a list of primitive values into an ABI-encoded hex value.
*
* - Docs: https://viem.sh/docs/abi/encodeAbiParameters#encodeabiparameters
*
* Generates ABI encoded data using the [ABI specification](https://docs.soliditylang.org/en/latest/abi-spec), given a set of ABI parameters (inputs/outputs) and their corresponding values.
*
* @param params - a set of ABI Parameters (params), that can be in the shape of the inputs or outputs attribute of an ABI Item.
* @param values - a set of values (values) that correspond to the given params.
* @example
* ```typescript
* import { encodeAbiParameters } from 'viem'
*
* const encodedData = encodeAbiParameters(
* [
* { name: 'x', type: 'string' },
* { name: 'y', type: 'uint' },
* { name: 'z', type: 'bool' }
* ],
* ['wagmi', 420n, true]
* )
* ```
*
* You can also pass in Human Readable parameters with the parseAbiParameters utility.
*
* @example
* ```typescript
* import { encodeAbiParameters, parseAbiParameters } from 'viem'
*
* const encodedData = encodeAbiParameters(
* parseAbiParameters('string x, uint y, bool z'),
* ['wagmi', 420n, true]
* )
* ```
*/
export function encodeAbiParameters(params, values) {
if (params.length !== values.length)
throw new AbiEncodingLengthMismatchError({
expectedLength: params.length,
givenLength: values.length,
});
// Prepare the parameters to determine dynamic types to encode.
const preparedParams = prepareParams({
params: params,
values: values,
});
const data = encodeParams(preparedParams);
if (data.length === 0)
return '0x';
return data;
}
function prepareParams({ params, values, }) {
const preparedParams = [];
for (let i = 0; i < params.length; i++) {
preparedParams.push(prepareParam({ param: params[i], value: values[i] }));
}
return preparedParams;
}
function prepareParam({ param, value, }) {
const arrayComponents = getArrayComponents(param.type);
if (arrayComponents) {
const [length, type] = arrayComponents;
return encodeArray(value, { length, param: { ...param, type } });
}
if (param.type === 'tuple') {
return encodeTuple(value, {
param: param,
});
}
if (param.type === 'address') {
return encodeAddress(value);
}
if (param.type === 'bool') {
return encodeBool(value);
}
if (param.type.startsWith('uint') || param.type.startsWith('int')) {
const signed = param.type.startsWith('int');
const [, , size = '256'] = integerRegex.exec(param.type) ?? [];
return encodeNumber(value, {
signed,
size: Number(size),
});
}
if (param.type.startsWith('bytes')) {
return encodeBytes(value, { param });
}
if (param.type === 'string') {
return encodeString(value);
}
throw new InvalidAbiEncodingTypeError(param.type, {
docsPath: '/docs/contract/encodeAbiParameters',
});
}
function encodeParams(preparedParams) {
// 1. Compute the size of the static part of the parameters.
let staticSize = 0;
for (let i = 0; i < preparedParams.length; i++) {
const { dynamic, encoded } = preparedParams[i];
if (dynamic)
staticSize += 32;
else
staticSize += size(encoded);
}
// 2. Split the parameters into static and dynamic parts.
const staticParams = [];
const dynamicParams = [];
let dynamicSize = 0;
for (let i = 0; i < preparedParams.length; i++) {
const { dynamic, encoded } = preparedParams[i];
if (dynamic) {
staticParams.push(numberToHex(staticSize + dynamicSize, { size: 32 }));
dynamicParams.push(encoded);
dynamicSize += size(encoded);
}
else {
staticParams.push(encoded);
}
}
// 3. Concatenate static and dynamic parts.
return concat([...staticParams, ...dynamicParams]);
}
function encodeAddress(value) {
if (!isAddress(value))
throw new InvalidAddressError({ address: value });
return { dynamic: false, encoded: padHex(value.toLowerCase()) };
}
function encodeArray(value, { length, param, }) {
const dynamic = length === null;
if (!Array.isArray(value))
throw new InvalidArrayError(value);
if (!dynamic && value.length !== length)
throw new AbiEncodingArrayLengthMismatchError({
expectedLength: length,
givenLength: value.length,
type: `${param.type}[${length}]`,
});
let dynamicChild = false;
const preparedParams = [];
for (let i = 0; i < value.length; i++) {
const preparedParam = prepareParam({ param, value: value[i] });
if (preparedParam.dynamic)
dynamicChild = true;
preparedParams.push(preparedParam);
}
if (dynamic || dynamicChild) {
const data = encodeParams(preparedParams);
if (dynamic) {
const length = numberToHex(preparedParams.length, { size: 32 });
return {
dynamic: true,
encoded: preparedParams.length > 0 ? concat([length, data]) : length,
};
}
if (dynamicChild)
return { dynamic: true, encoded: data };
}
return {
dynamic: false,
encoded: concat(preparedParams.map(({ encoded }) => encoded)),
};
}
function encodeBytes(value, { param }) {
const [, paramSize] = param.type.split('bytes');
const bytesSize = size(value);
if (!paramSize) {
let value_ = value;
// If the size is not divisible by 32 bytes, pad the end
// with empty bytes to the ceiling 32 bytes.
if (bytesSize % 32 !== 0)
value_ = padHex(value_, {
dir: 'right',
size: Math.ceil((value.length - 2) / 2 / 32) * 32,
});
return {
dynamic: true,
encoded: concat([padHex(numberToHex(bytesSize, { size: 32 })), value_]),
};
}
if (bytesSize !== Number.parseInt(paramSize, 10))
throw new AbiEncodingBytesSizeMismatchError({
expectedSize: Number.parseInt(paramSize, 10),
value,
});
return { dynamic: false, encoded: padHex(value, { dir: 'right' }) };
}
function encodeBool(value) {
if (typeof value !== 'boolean')
throw new BaseError(`Invalid boolean value: "${value}" (type: ${typeof value}). Expected: \`true\` or \`false\`.`);
return { dynamic: false, encoded: padHex(boolToHex(value)) };
}
function encodeNumber(value, { signed, size = 256 }) {
if (typeof size === 'number') {
const max = 2n ** (BigInt(size) - (signed ? 1n : 0n)) - 1n;
const min = signed ? -max - 1n : 0n;
if (value > max || value < min)
throw new IntegerOutOfRangeError({
max: max.toString(),
min: min.toString(),
signed,
size: size / 8,
value: value.toString(),
});
}
return {
dynamic: false,
encoded: numberToHex(value, {
size: 32,
signed,
}),
};
}
function encodeString(value) {
const hexValue = stringToHex(value);
const partsLength = Math.ceil(size(hexValue) / 32);
const parts = [];
for (let i = 0; i < partsLength; i++) {
parts.push(padHex(slice(hexValue, i * 32, (i + 1) * 32), {
dir: 'right',
}));
}
return {
dynamic: true,
encoded: concat([
padHex(numberToHex(size(hexValue), { size: 32 })),
...parts,
]),
};
}
function encodeTuple(value, { param }) {
let dynamic = false;
const preparedParams = [];
for (let i = 0; i < param.components.length; i++) {
const param_ = param.components[i];
const index = Array.isArray(value) ? i : param_.name;
const preparedParam = prepareParam({
param: param_,
value: value[index],
});
preparedParams.push(preparedParam);
if (preparedParam.dynamic)
dynamic = true;
}
return {
dynamic,
encoded: dynamic
? encodeParams(preparedParams)
: concat(preparedParams.map(({ encoded }) => encoded)),
};
}
export function getArrayComponents(type) {
const matches = type.match(/^(.*)\[(\d+)?\]$/);
return matches
? // Return `null` if the array is dynamic.
[matches[2] ? Number(matches[2]) : null, matches[1]]
: undefined;
}
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