Fixed conversion within base units (#7)

* Fixed toBaseUnit/fromBaseUnit

* BaseAmount edge cases

Author: EvgenKor

lib/networks/client.d.ts

@@ -1,6 +1,6 @@
 import { TxFee } from './transaction';
 /** Account number or address */
-export type AccountId = number | string;
+export declare type AccountId = number | string;
 export declare abstract class Client {
     transactionUrl: string;
     abstract getAddress(): Promise<string>;
@@ -27,20 +27,17 @@ export declare abstract class Client {
     getDirectDepositContract(poolAddress: string): Promise<string>;
     directDeposit(poolAddress: string, amount: string, zkAddress: string): Promise<string>;
     getTransactionUrl(hash: string): string;
-    /**
-     *
-     */
-    updateState(): Promise<void>;
+    decimals(tokenAddress: string): Promise<number>;
     /**
      * Convert human-readable representation of coin to smallest non-divisible (base) representation.
      * @param amount
      */
-    abstract toBaseUnit(amount: string): string;
+    abstract toBaseUnit(tokenAddress: string, amount: string): Promise<string>;
     /**
     * Convert coin represented with smallest non-divisible units to a human-readable representation.
     * @param amount
     */
-    abstract fromBaseUnit(amount: string): string;
+    abstract fromBaseUnit(tokenAddress: string, amount: string): Promise<string>;
     /**
      * Get estimated transaction fee.
      */

lib/networks/client.js

@@ -11,6 +11,7 @@ export declare class EthereumClient extends Client {
     private pool;
     private dd;
     private ddContractAddresses;
+    private tokenDecimals;
     gasMultiplier: number;
     constructor(provider: provider, config?: Config);
     getChainId(): Promise<number>;
@@ -20,16 +21,18 @@ export declare class EthereumClient extends Client {
     getTokenNonce(tokenAddress: string): Promise<string>;
     getTokenName(tokenAddress: string): Promise<string>;
     transfer(to: string, amount: string): Promise<string>;
+    decimals(tokenAddress: string): Promise<number>;
     /**
-     * Converts ether to Wei.
-     * @param amount in Ether
+     * Converts a token amount to the minimum supported resolution
+     * Resolution depends on token's `decimal` property
+     * @param amount in Ether\tokens
      */
-    toBaseUnit(amount: string): string;
+    toBaseUnit(tokenAddress: string, amount: string): Promise<string>;
     /**
-     * Converts Wei to ether.
-     * @param amount in Wei
+     * Converts token native amount to the humah-readable representations
+     * @param amount in minimum supported units
      */
-    fromBaseUnit(amount: string): string;
+    fromBaseUnit(tokenAddress: string, amount: string): Promise<string>;
     estimateTxFee(): Promise<TxFee>;
     mint(minterAddress: string, amount: string): Promise<string>;
     transferToken(tokenAddress: string, to: string, amount: string): Promise<string>;