moved ZeroExTransactionDecoder into contract wrappers

1 files changed, 63 insertions, 0 deletions

diff --git a/packages/contract-wrappers/src/utils/zeroex_transaction_decoder.ts b/packages/contract-wrappers/src/utils/zeroex_transaction_decoder.ts
new file mode 100644
index 000000000..441424e92
--- /dev/null
+++ b/packages/contract-wrappers/src/utils/zeroex_transaction_decoder.ts
@@ -0,0 +1,63 @@
+import { getContractAddressesForNetworkOrThrow, NetworkId } from '@0x/contract-addresses';
+import * as ContractArtifacts from '@0x/contract-artifacts';
+import { SimpleContractArtifact } from '@0x/types';
+import { AbiDefinition, ContractAbi } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { DeployedContractInfo, DeployedContractInfoByName, TransactionData, TransactionDecoder, TransactionProperties } from '@0x/utils';
+
+export class ZeroExTransactionDecoder extends TransactionDecoder {
+    private static _instance: ZeroExTransactionDecoder;
+
+    public static addABI(
+        abiArray: AbiDefinition[],
+        contractName: string,
+        deploymentInfos?: DeployedContractInfo[],
+    ): void {
+        const instance = ZeroExTransactionDecoder._getInstance();
+        instance.addABI(abiArray, contractName, deploymentInfos);
+    }
+
+    public static decode(calldata: string, txProperties?: TransactionProperties): TransactionData {
+        const instance = ZeroExTransactionDecoder._getInstance();
+        const decodedCalldata = instance.decode(calldata, txProperties);
+        return decodedCalldata;
+    }
+
+    private static _getInstance(): ZeroExTransactionDecoder {
+        if (!ZeroExTransactionDecoder._instance) {
+            ZeroExTransactionDecoder._instance = new ZeroExTransactionDecoder();
+        }
+        return ZeroExTransactionDecoder._instance;
+    }
+
+    private constructor() {
+        super();
+        // Load addresses by contract name
+        const deployedContractInfoByName: DeployedContractInfoByName = {};
+        _.each(NetworkId, (networkId: any) => {
+            if (typeof networkId !== 'number') {
+                return;
+            }
+            const contractAddressesForNetwork = getContractAddressesForNetworkOrThrow(networkId);
+            _.each(contractAddressesForNetwork, (contractAddress: string, contractName: string) => {
+                const contractNameLowercase = _.toLower(contractName);
+                if (_.isUndefined(deployedContractInfoByName[contractNameLowercase])) {
+                    deployedContractInfoByName[contractNameLowercase] = [];
+                }
+                deployedContractInfoByName[contractNameLowercase].push({
+                    contractAddress,
+                    networkId,
+                });
+            });
+        });
+        // Load contract artifacts
+        _.each(ContractArtifacts, (contractArtifactAsJson: any) => {
+            const conractArtifact = contractArtifactAsJson as SimpleContractArtifact;
+            const contractName = conractArtifact.contractName;
+            const contractNameLowercase = _.toLower(contractName);
+            const contractAbi: ContractAbi = conractArtifact.compilerOutput.abi;
+            this.addABI(contractAbi, contractName, deployedContractInfoByName[contractNameLowercase]);
+        });
+    }
+}