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87
packages/internal/dex/sdk/src/lib/nativeTokenService.test.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| import { | ||
| expectERC20, | ||
| expectNative, | ||
| formatAmount, | ||
| FUN_TEST_TOKEN, | ||
| nativeTokenService, | ||
| newAmountFromString, | ||
| } from 'test/utils'; | ||
|
|
||
| describe('NativeTokenService', () => { | ||
| describe('wrapAmount', () => { | ||
| it('converts native token amounts to their wrapped equivalent', () => { | ||
| const nativeAmount = newAmountFromString('1', nativeTokenService.nativeToken); | ||
| const wrappedEquivalent = nativeTokenService.wrapAmount(nativeAmount); | ||
| expectERC20(wrappedEquivalent.token, nativeTokenService.wrappedToken.address); | ||
| expect(formatAmount(wrappedEquivalent)).toEqual('1.0'); | ||
| }); | ||
| }); | ||
|
|
||
| describe('unwrapAmount', () => { | ||
| it('converts wrapped token amounts to their native equivalent', () => { | ||
| const wrappedAmount = newAmountFromString('1', nativeTokenService.wrappedToken); | ||
| const nativeEquivalent = nativeTokenService.unwrapAmount(wrappedAmount); | ||
| expectNative(nativeEquivalent.token); | ||
| expect(formatAmount(nativeEquivalent)).toEqual('1.0'); | ||
| }); | ||
|
|
||
| it('throws an error if the token is not a wrapped native amount', () => { | ||
| const erc20Amount = newAmountFromString('1', FUN_TEST_TOKEN); | ||
| expect(() => nativeTokenService.unwrapAmount(erc20Amount)).toThrowError( | ||
| 'token 0xCc7bb2D219A0FC08033E130629C2B854b7bA9195 is not wrapped', | ||
| ); | ||
| }); | ||
| }); | ||
|
|
||
| describe('maybeWrapToken', () => { | ||
| it('wraps native tokens', () => { | ||
| const wrappedToken = nativeTokenService.maybeWrapToken(nativeTokenService.nativeToken); | ||
| expectERC20(wrappedToken); | ||
| }); | ||
|
|
||
| it('does not wrap an already wrapped token', () => { | ||
| const stillTheWrappedToken = nativeTokenService.maybeWrapToken(nativeTokenService.wrappedToken); | ||
| expect(stillTheWrappedToken).toEqual(nativeTokenService.wrappedToken); | ||
| }); | ||
|
|
||
| it('does not wrap a normal ERC20 token', () => { | ||
| const stillTheFunToken = nativeTokenService.maybeWrapToken(FUN_TEST_TOKEN); | ||
| expect(stillTheFunToken).toEqual(stillTheFunToken); | ||
| }); | ||
| }); | ||
|
|
||
| describe('maybeWrapAmount', () => { | ||
| it('wraps native amounts', () => { | ||
| const nativeAmount = newAmountFromString('1', nativeTokenService.nativeToken); | ||
| const wrappedEquivalent = nativeTokenService.maybeWrapAmount(nativeAmount); | ||
| expectERC20(wrappedEquivalent.token, nativeTokenService.wrappedToken.address); | ||
| expect(formatAmount(wrappedEquivalent)).toEqual('1.0'); | ||
| }); | ||
|
|
||
| it('does not wrap an already wrapped amount', () => { | ||
| const wrappedAmount = newAmountFromString('1', nativeTokenService.wrappedToken); | ||
| const stillTheWrappedAmount = nativeTokenService.maybeWrapAmount(wrappedAmount); | ||
| expect(stillTheWrappedAmount).toEqual(wrappedAmount); | ||
| }); | ||
|
|
||
| it('does not wrap a normal ERC20 amount', () => { | ||
| const erc20Amount = newAmountFromString('1', FUN_TEST_TOKEN); | ||
| const stillTheFunAmount = nativeTokenService.maybeWrapAmount(erc20Amount); | ||
| expect(stillTheFunAmount).toEqual(erc20Amount); | ||
| }); | ||
| }); | ||
|
|
||
| describe('isNativeToken', () => { | ||
| it('returns true for the native token', () => { | ||
| expect(nativeTokenService.isNativeToken(nativeTokenService.nativeToken)).toEqual(true); | ||
| }); | ||
|
|
||
| it('returns false for the wrapped token', () => { | ||
| expect(nativeTokenService.isNativeToken(nativeTokenService.wrappedToken)).toEqual(false); | ||
| }); | ||
|
|
||
| it('returns false for a normal ERC20 token', () => { | ||
| expect(nativeTokenService.isNativeToken(FUN_TEST_TOKEN)).toEqual(false); | ||
| }); | ||
| }); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| import { | ||
| Amount, Coin, ERC20, Native, | ||
| } from 'types'; | ||
| import { newAmount } from './utils'; | ||
|
|
||
| export class NativeTokenService { | ||
| constructor(readonly nativeToken: Native, readonly wrappedToken: ERC20) {} | ||
|
|
||
| wrapAmount(amount: Amount<Native>): Amount<ERC20> { | ||
| return newAmount(amount.value, this.wrappedToken); | ||
| } | ||
|
|
||
| unwrapAmount(amount: Amount<ERC20>): Amount<Native> { | ||
| if (amount.token !== this.wrappedToken) { | ||
| throw new Error(`token ${amount.token.address} is not wrapped`); | ||
| } | ||
| return newAmount(amount.value, this.nativeToken); | ||
| } | ||
|
|
||
| maybeWrapToken(token: Coin): ERC20 { | ||
| if (this.isNativeToken(token)) { | ||
| return this.wrappedToken; | ||
| } | ||
| return token as ERC20; | ||
| } | ||
|
|
||
| maybeWrapAmount(amount: Amount<Coin>): Amount<ERC20> { | ||
| return newAmount(amount.value, this.maybeWrapToken(amount.token)); | ||
| } | ||
|
|
||
| isNativeToken(token: Coin): token is Native { | ||
| return token === this.nativeToken; | ||
| } | ||
| } |
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