chore: dont override toString of BigNumber and other PR feedback

1 files changed, 84 insertions, 0 deletions

diff --git a/packages/instant/src/components/erc20_asset_amount_input.tsx b/packages/instant/src/components/erc20_asset_amount_input.tsx
new file mode 100644
index 000000000..583fad28b
--- /dev/null
+++ b/packages/instant/src/components/erc20_asset_amount_input.tsx
@@ -0,0 +1,84 @@
+import * as _ from 'lodash';
+import * as React from 'react';
+
+import { ColorOption, transparentWhite } from '../style/theme';
+import { ERC20Asset } from '../types';
+import { assetUtils } from '../util/asset';
+import { BigNumberInput } from '../util/big_number_input';
+import { util } from '../util/util';
+
+import { ScalingAmountInput } from './scaling_amount_input';
+import { Container, Text } from './ui';
+
+// Asset amounts only apply to ERC20 assets
+export interface ERC20AssetAmountInputProps {
+    asset?: ERC20Asset;
+    value?: BigNumberInput;
+    onChange: (value?: BigNumberInput, asset?: ERC20Asset) => void;
+    startingFontSizePx: number;
+    fontColor?: ColorOption;
+}
+
+export interface ERC20AssetAmountInputState {
+    currentFontSizePx: number;
+}
+
+export class ERC20AssetAmountInput extends React.Component<ERC20AssetAmountInputProps, ERC20AssetAmountInputState> {
+    public static defaultProps = {
+        onChange: util.boundNoop,
+    };
+    constructor(props: ERC20AssetAmountInputProps) {
+        super(props);
+        this.state = {
+            currentFontSizePx: props.startingFontSizePx,
+        };
+    }
+    public render(): React.ReactNode {
+        const { asset, onChange, ...rest } = this.props;
+        return (
+            <Container whiteSpace="nowrap">
+                <Container borderBottom={`1px solid ${transparentWhite}`} display="inline-block">
+                    <ScalingAmountInput
+                        {...rest}
+                        textLengthThreshold={this._textLengthThresholdForAsset(asset)}
+                        maxFontSizePx={this.props.startingFontSizePx}
+                        onChange={this._handleChange}
+                        onFontSizeChange={this._handleFontSizeChange}
+                    />
+                </Container>
+                <Container display="inline-flex" marginLeft="10px" title={assetUtils.bestNameForAsset(asset)}>
+                    <Text
+                        fontSize={`${this.state.currentFontSizePx}px`}
+                        fontColor={ColorOption.white}
+                        textTransform="uppercase"
+                    >
+                        {assetUtils.formattedSymbolForAsset(asset)}
+                    </Text>
+                </Container>
+            </Container>
+        );
+    }
+    private readonly _handleChange = (value?: BigNumberInput): void => {
+        this.props.onChange(value, this.props.asset);
+    };
+    private readonly _handleFontSizeChange = (fontSizePx: number): void => {
+        this.setState({
+            currentFontSizePx: fontSizePx,
+        });
+    };
+    // For assets with symbols of different length,
+    // start scaling the input at different character lengths
+    private readonly _textLengthThresholdForAsset = (asset?: ERC20Asset): number => {
+        if (_.isUndefined(asset)) {
+            return 3;
+        }
+        const symbol = asset.metaData.symbol;
+        if (symbol.length <= 3) {
+            return 5;
+        }
+        if (symbol.length === 5) {
+            return 3;
+        }
+        return 4;
+    };
+}