Add contracts to packages, fix most linting errors

1 files changed, 56 insertions, 0 deletions

diff --git a/packages/contracts/util/token_registry_wrapper.ts b/packages/contracts/util/token_registry_wrapper.ts
new file mode 100644
index 000000000..5065a1802
--- /dev/null
+++ b/packages/contracts/util/token_registry_wrapper.ts
@@ -0,0 +1,56 @@
+import {ContractInstance, Token} from './types';
+
+export class TokenRegWrapper {
+  private tokenReg: ContractInstance;
+  constructor(tokenRegContractInstance: ContractInstance) {
+    this.tokenReg = tokenRegContractInstance;
+  }
+  public addTokenAsync(token: Token, from: string) {
+    const tx = this.tokenReg.addToken(
+      token.address,
+      token.name,
+      token.symbol,
+      token.decimals,
+      token.ipfsHash,
+      token.swarmHash,
+      {from},
+    );
+    return tx;
+  }
+  public async getTokenMetaDataAsync(tokenAddress: string) {
+    const data = await this.tokenReg.getTokenMetaData(tokenAddress);
+    const token: Token = {
+      address: data[0],
+      name: data[1],
+      symbol: data[2],
+      decimals: data[3].toNumber(),
+      ipfsHash: data[4],
+      swarmHash: data[5],
+    };
+    return token;
+  }
+  public async getTokenByNameAsync(tokenName: string) {
+    const data = await this.tokenReg.getTokenByName(tokenName);
+    const token: Token = {
+      address: data[0],
+      name: data[1],
+      symbol: data[2],
+      decimals: data[3].toNumber(),
+      ipfsHash: data[4],
+      swarmHash: data[5],
+    };
+    return token;
+  }
+  public async getTokenBySymbolAsync(tokenSymbol: string) {
+    const data = await this.tokenReg.getTokenBySymbol(tokenSymbol);
+    const token: Token = {
+      address: data[0],
+      name: data[1],
+      symbol: data[2],
+      decimals: data[3].toNumber(),
+      ipfsHash: data[4],
+      swarmHash: data[5],
+    };
+    return token;
+  }
+}