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author | Leonid Logvinov <logvinov.leon@gmail.com> | 2019-01-09 19:02:25 +0800 |
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committer | Leonid Logvinov <logvinov.leon@gmail.com> | 2019-01-09 19:02:25 +0800 |
commit | ea14913b412e78ff458bdfba47182f7363e776e5 (patch) | |
tree | 3ee220bfbbd9923b5e1adc36ee51f9b5d39ad640 /packages/utils/src/abi_encoder/evm_data_types/address.ts | |
parent | 5868c91cfb54cfa9177572b201d88d1168bf5b06 (diff) | |
parent | 5dd55491b86bf8577405e37d0f2d668aa1273b10 (diff) | |
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Merge development
Diffstat (limited to 'packages/utils/src/abi_encoder/evm_data_types/address.ts')
-rw-r--r-- | packages/utils/src/abi_encoder/evm_data_types/address.ts | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/packages/utils/src/abi_encoder/evm_data_types/address.ts b/packages/utils/src/abi_encoder/evm_data_types/address.ts new file mode 100644 index 000000000..88846b1fa --- /dev/null +++ b/packages/utils/src/abi_encoder/evm_data_types/address.ts @@ -0,0 +1,49 @@ +import { DataItem, SolidityTypes } from 'ethereum-types'; +import * as ethUtil from 'ethereumjs-util'; +import * as _ from 'lodash'; + +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'; + +export class AddressDataType extends AbstractBlobDataType { + private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true; + private static readonly _ADDRESS_SIZE_IN_BYTES = 20; + private static readonly _DECODED_ADDRESS_OFFSET_IN_BYTES = constants.EVM_WORD_WIDTH_IN_BYTES - + AddressDataType._ADDRESS_SIZE_IN_BYTES; + + public static matchType(type: string): boolean { + return type === SolidityTypes.Address; + } + + public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) { + super(dataItem, dataTypeFactory, AddressDataType._SIZE_KNOWN_AT_COMPILE_TIME); + if (!AddressDataType.matchType(dataItem.type)) { + throw new Error(`Tried to instantiate Address with bad input: ${dataItem}`); + } + } + + // Disable prefer-function-over-method for inherited abstract methods. + /* tslint:disable prefer-function-over-method */ + public encodeValue(value: string): Buffer { + if (!ethUtil.isValidAddress(value)) { + throw new Error(`Invalid address: '${value}'`); + } + const valueBuf = ethUtil.toBuffer(value); + const encodedValueBuf = ethUtil.setLengthLeft(valueBuf, constants.EVM_WORD_WIDTH_IN_BYTES); + return encodedValueBuf; + } + + public decodeValue(calldata: RawCalldata): string { + const valueBufPadded = calldata.popWord(); + const valueBuf = valueBufPadded.slice(AddressDataType._DECODED_ADDRESS_OFFSET_IN_BYTES); + const value = ethUtil.bufferToHex(valueBuf); + return value; + } + + public getSignature(): string { + return SolidityTypes.Address; + } + /* tslint:enable prefer-function-over-method */ +} |