diff options
author | Steve Klebanoff <steve.klebanoff@gmail.com> | 2018-12-01 06:09:23 +0800 |
---|---|---|
committer | Steve Klebanoff <steve.klebanoff@gmail.com> | 2018-12-01 06:09:23 +0800 |
commit | ef041d1603ed9c707c032c5620f9829eeaf0e361 (patch) | |
tree | e67491b0c66fc50dcf8dfdfa7e57068696f219fc /packages/utils/src/abi_encoder/evm_data_types/int.ts | |
parent | 271adcdb7e3ecb9f88f05f36ffb71d2147bac292 (diff) | |
parent | 34b2f4736e30b50f94a3110c313131b56e35bc02 (diff) | |
download | dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.tar dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.tar.gz dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.tar.bz2 dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.tar.lz dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.tar.xz dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.tar.zst dexon-sol-tools-ef041d1603ed9c707c032c5620f9829eeaf0e361.zip |
Merge branch 'feature/instant/prod-env-switches-cdn' into feature/instant/rollbar-env
Diffstat (limited to 'packages/utils/src/abi_encoder/evm_data_types/int.ts')
-rw-r--r-- | packages/utils/src/abi_encoder/evm_data_types/int.ts | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/packages/utils/src/abi_encoder/evm_data_types/int.ts b/packages/utils/src/abi_encoder/evm_data_types/int.ts new file mode 100644 index 000000000..f1dcf5ea1 --- /dev/null +++ b/packages/utils/src/abi_encoder/evm_data_types/int.ts @@ -0,0 +1,59 @@ +import { DataItem, SolidityTypes } from 'ethereum-types'; +import * as _ from 'lodash'; + +import { BigNumber } from '../../configured_bignumber'; +import { DataTypeFactory } from '../abstract_data_types/interfaces'; +import { AbstractBlobDataType } from '../abstract_data_types/types/blob'; +import { RawCalldata } from '../calldata/raw_calldata'; +import { constants } from '../utils/constants'; +import * as EncoderMath from '../utils/math'; + +export class IntDataType extends AbstractBlobDataType { + private static readonly _MATCHER = RegExp( + '^int(8|16|24|32|40|48|56|64|72|88|96|104|112|120|128|136|144|152|160|168|176|184|192|200|208|216|224|232|240|248|256){0,1}$', + ); + private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true; + private static readonly _MAX_WIDTH: number = 256; + private static readonly _DEFAULT_WIDTH: number = IntDataType._MAX_WIDTH; + private readonly _width: number; + private readonly _minValue: BigNumber; + private readonly _maxValue: BigNumber; + + public static matchType(type: string): boolean { + return IntDataType._MATCHER.test(type); + } + + private static _decodeWidthFromType(type: string): number { + const matches = IntDataType._MATCHER.exec(type); + const width = + !_.isNull(matches) && matches.length === 2 && !_.isUndefined(matches[1]) + ? parseInt(matches[1], constants.DEC_BASE) + : IntDataType._DEFAULT_WIDTH; + return width; + } + + public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) { + super(dataItem, dataTypeFactory, IntDataType._SIZE_KNOWN_AT_COMPILE_TIME); + if (!IntDataType.matchType(dataItem.type)) { + throw new Error(`Tried to instantiate Int with bad input: ${dataItem}`); + } + this._width = IntDataType._decodeWidthFromType(dataItem.type); + this._minValue = new BigNumber(2).toPower(this._width - 1).times(-1); + this._maxValue = new BigNumber(2).toPower(this._width - 1).sub(1); + } + + public encodeValue(value: BigNumber | string | number): Buffer { + const encodedValue = EncoderMath.safeEncodeNumericValue(value, this._minValue, this._maxValue); + return encodedValue; + } + + public decodeValue(calldata: RawCalldata): BigNumber { + const valueBuf = calldata.popWord(); + const value = EncoderMath.safeDecodeNumericValue(valueBuf, this._minValue, this._maxValue); + return value; + } + + public getSignature(): string { + return `${SolidityTypes.Int}${this._width}`; + } +} |