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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| /* | ||
| This file is part of web3.js. | ||
| web3.js is free software: you can redistribute it and/or modify | ||
| it under the terms of the GNU Lesser General Public License as published by | ||
| the Free Software Foundation, either version 3 of the License, or | ||
| (at your option) any later version. | ||
| web3.js is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public License | ||
| along with web3.js. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| import { AbiError } from 'web3-errors'; | ||
| import { AbiParameter } from 'web3-types'; | ||
| import { toChecksumAddress } from 'web3-utils'; | ||
| import { isAddress, utils } from 'web3-validator'; | ||
| import { DecoderResult, EncoderResult } from '../types.js'; | ||
| import { alloc, WORD_SIZE } from '../utils.js'; | ||
|
|
||
| const ADDRESS_BYTES_COUNT = 20; | ||
| const ADDRESS_OFFSET = WORD_SIZE - ADDRESS_BYTES_COUNT; | ||
|
|
||
| export function encodeAddress(param: AbiParameter, input: unknown): EncoderResult { | ||
| if (typeof input !== 'string') { | ||
| throw new AbiError('address type expects string as input type', { | ||
| value: input, | ||
| name: param.name, | ||
| type: param.type, | ||
| }); | ||
| } | ||
| let address = input.toLowerCase(); | ||
| if (!address.startsWith('0x')) { | ||
| address = `0x${address}`; | ||
| } | ||
| if (!isAddress(address)) { | ||
| throw new AbiError('provided input is not valid address', { | ||
| value: input, | ||
| name: param.name, | ||
| type: param.type, | ||
| }); | ||
| } | ||
| // for better performance, we could convert hex to destination bytes directly (encoded var) | ||
| const addressBytes = utils.hexToUint8Array(address); | ||
| // expand address to WORD_SIZE | ||
| const encoded = alloc(WORD_SIZE); | ||
| encoded.set(addressBytes, ADDRESS_OFFSET); | ||
| return { | ||
| dynamic: false, | ||
| encoded, | ||
| }; | ||
| } | ||
|
|
||
| export function decodeAddress(_param: AbiParameter, bytes: Uint8Array): DecoderResult<string> { | ||
| const addressBytes = bytes.subarray(ADDRESS_OFFSET, WORD_SIZE); | ||
| if (addressBytes.length !== ADDRESS_BYTES_COUNT) { | ||
| throw new AbiError('Invalid decoding input, not enough bytes to decode address', { bytes }); | ||
| } | ||
| const result = utils.uint8ArrayToHexString(addressBytes); | ||
|
|
||
| // should we check is decoded value is valid address? | ||
| // if(!isAddress(result)) { | ||
| // throw new AbiError("encoded data is not valid address", { | ||
| // address: result, | ||
| // }); | ||
| // } | ||
| return { | ||
| result: toChecksumAddress(result), | ||
| encoded: bytes.subarray(WORD_SIZE), | ||
| consumed: WORD_SIZE, | ||
| }; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| /* | ||
| This file is part of web3.js. | ||
| web3.js is free software: you can redistribute it and/or modify | ||
| it under the terms of the GNU Lesser General Public License as published by | ||
| the Free Software Foundation, either version 3 of the License, or | ||
| (at your option) any later version. | ||
| web3.js is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public License | ||
| along with web3.js. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| import { AbiError } from 'web3-errors'; | ||
| import { AbiParameter } from 'web3-types'; | ||
| import { uint8ArrayConcat } from 'web3-utils'; | ||
| // eslint-disable-next-line import/no-cycle | ||
| import { decodeParamFromAbiParameter, encodeNumber, encodeParamFromAbiParameter } from '.'; | ||
| import { DecoderResult, EncoderResult } from '../types.js'; | ||
| import { extractArrayType, isDynamic, WORD_SIZE } from '../utils.js'; | ||
| import { decodeNumber } from './number.js'; | ||
| import { encodeDynamicParams } from './utils.js'; | ||
|
|
||
| export function encodeArray(param: AbiParameter, values: unknown): EncoderResult { | ||
| if (!Array.isArray(values)) { | ||
| throw new AbiError('Expected value to be array', { abi: param, values }); | ||
| } | ||
| const { size, param: arrayItemParam } = extractArrayType(param); | ||
| const encodedParams = values.map(v => encodeParamFromAbiParameter(arrayItemParam, v)); | ||
| const dynamic = size === -1; | ||
| const dynamicItems = encodedParams.length > 0 && encodedParams[0].dynamic; | ||
| if (!dynamic && values.length !== size) { | ||
| throw new AbiError("Given arguments count doesn't match array length", { | ||
| arrayLength: size, | ||
| argumentsLength: values.length, | ||
| }); | ||
| } | ||
| if (dynamic || dynamicItems) { | ||
| const encodingResult = encodeDynamicParams(encodedParams); | ||
| if (dynamic) { | ||
| const encodedLength = encodeNumber( | ||
| { type: 'uint256', name: '' }, | ||
| encodedParams.length, | ||
| ).encoded; | ||
| return { | ||
| dynamic: true, | ||
| encoded: | ||
| encodedParams.length > 0 | ||
| ? uint8ArrayConcat(encodedLength, encodingResult) | ||
| : encodedLength, | ||
| }; | ||
| } | ||
| return { | ||
| dynamic: true, | ||
| encoded: encodingResult, | ||
| }; | ||
| } | ||
|
|
||
| return { | ||
| dynamic: false, | ||
| encoded: uint8ArrayConcat(...encodedParams.map(p => p.encoded)), | ||
| }; | ||
| } | ||
|
|
||
| export function decodeArray(param: AbiParameter, bytes: Uint8Array): DecoderResult<unknown[]> { | ||
| // eslint-disable-next-line prefer-const | ||
| let { size, param: arrayItemParam } = extractArrayType(param); | ||
| const dynamic = size === -1; | ||
|
|
||
| let consumed = 0; | ||
| const result: unknown[] = []; | ||
| let remaining = bytes; | ||
| // dynamic array, we need to decode length | ||
| if (dynamic) { | ||
| const lengthResult = decodeNumber({ type: 'uint32', name: '' }, bytes); | ||
| size = Number(lengthResult.result); | ||
| consumed = lengthResult.consumed; | ||
| remaining = lengthResult.encoded; | ||
| } | ||
| const hasDynamicChild = isDynamic(arrayItemParam); | ||
| if (hasDynamicChild) { | ||
| // known length but dynamic child, each child is actually head element with encoded offset | ||
| for (let i = 0; i < size; i += 1) { | ||
| const offsetResult = decodeNumber( | ||
| { type: 'uint32', name: '' }, | ||
| remaining.subarray(i * WORD_SIZE), | ||
| ); | ||
| consumed += offsetResult.consumed; | ||
| const decodedChildResult = decodeParamFromAbiParameter( | ||
| arrayItemParam, | ||
| remaining.subarray(Number(offsetResult.result)), | ||
| ); | ||
| consumed += decodedChildResult.consumed; | ||
| result.push(decodedChildResult.result); | ||
| } | ||
| return { | ||
| result, | ||
| encoded: remaining.subarray(consumed), | ||
| consumed, | ||
| }; | ||
| } | ||
|
|
||
| for (let i = 0; i < size; i += 1) { | ||
| // decode static params | ||
| const decodedChildResult = decodeParamFromAbiParameter( | ||
| arrayItemParam, | ||
| bytes.subarray(consumed), | ||
| ); | ||
| consumed += decodedChildResult.consumed; | ||
| result.push(decodedChildResult.result); | ||
| } | ||
| return { | ||
| result, | ||
| encoded: bytes.subarray(consumed), | ||
| consumed, | ||
| }; | ||
| } |
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